Categories
write my dissertation for me

Social media audit and content analysis Commercial website

Social media audit and content analysis

            Te social media audit is an important tool to evaluate what us working across social media channels. For instance, a commercial website can undertake a social media audit to inspect the traffic of the clients on the social media and the visiting pattern of the clients. This information is quite important in order to assess the success of the website. In the present paper, the social media content analysis was performed to analyze the success of the commercial website that is engaged in the online selling of the clothes for both the men and women. The client asked to evaluate the customer traffic on the website and the inquiry that is most valued to the consumers.

Search term: “New arrival”

            The search term used in the social media audit was new arrival. It means that the customers are looking for the new inventory in the apparel warehouse. The customer was also keen to observe that how many customers searched for that inquiry form the last six weeks. Moreover, he was also interested that whether the searching trend was increased or decreased over time. This is the time for seasonal peak and the customers are looking for the arrival of the new entry in the ware house for the clothing. The audit reveals that the customer’s tendency to search the term “new arrival” is significant at the first week.

             The tendency tends to increase over time and decreases over time. This implies that the when customer do not find any new item in the inventory they loose interest to search for the new items in the inventory of the websites. Therefore, this information is an important source if the understanding that the online inventory must possess the latest and up-to-date designs and the outfits for the customers. Negligence in that regard could be harmful for the business and the profitability. 

Figure 1: Number of search terms used by the customer on the website during the time period of last six weeks.

                 There is also other important messages and information that can also be identified. Foe instance, the role of the feedback is very important. For instance, the message sent and received, new subscribers and news customers are also important sources of information that is needed in order to evaluate the business. This information is also included in the social media audit. Once, the client ha such information, he/she has clear idea that what is going in the business. Moreover, what the customer is thinking about the business and how the business can be improved in that regard. Therefore, customer can then adopt strategies with the help of that information to improve the condition of the business in a positive direction. This direction could be fruitful and positive in that regard. The details are given in the table 1.

Particulars Numbers
Incoming messages 1080
Outgoing messages 566
New subscribers 345
New customers 234

Table 1: Social media audit information

Categories
essay help professional dissertation writers write my dissertation for me

drag the appropriate items to their respective bins.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 1/41

Homework 5 Geologic Time Due: 11:59pm on Sunday, February 28, 2016

You will receive no credit for items you complete after the assignment is due. Grading Policy

Interactive Animation: Relative Geologic Dating

When you have finished, answer the questions.

Part A

Which of the following statements about relative and absolute age dating is most accurate?

ANSWER:

Correct

Part B

What is the principle of original horizontality?

ANSWER:

Relative age dating places rocks and events in chronological order and can provide information about absolute age.

Relative age dating provides information about absolute ages but does not place rocks and events in chronological order.

Relative age dating places rocks and events in chronological order but does not provide information about absolute age.

Relative age dating does not provide information about absolute ages, nor does it place rocks and events in chronological order.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 2/41

Correct

Part C

What is the principle of superposition? 

ANSWER:

Correct

Part D

What is the principle of cross­cutting relationships?

ANSWER:

Correct

Part E

Five layers of rock are cut by two faults. Both faults cut through all five layers of rock. Fault A breaks through to the surface, whereas fault B does not. Which of the following statements about faults A and B is most accurate?

Metamorphic rocks are close to horizontal when deposited.

Sedimentary rocks are close to horizontal when deposited.

Sedimentary rocks are close to horizontal when eroded.

Metamorphic rocks are close to horizontal when eroded.

Within a sequence of rock layers formed at Earth’s surface, rock layers in the middle of a sequence are older.

Within a sequence of rock layers formed at Earth’s surface, rock layers higher in the sequence are older.

Within a sequence of rock layers formed at Earth’s surface, rock layers lower in the sequence are older.

Geologic features that cut through rocks must form at roughly the same time as the rocks that they cut through.

Geologic features that cut through rocks must form before the rocks that they cut through.

Geologic features that cut through rocks must form after the rocks that they cut through.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 3/41

ANSWER:

Correct

Part F

Which principle of relative age dating is important for determining the relative age of igneous rock that has intruded into overlying rock?

ANSWER:

Correct

Part G

A fault (F) breaks three layers of sedimentary rock (S). An igneous intrusion (I1) has broken through the bottommost layer of rock. A second igneous intrusion (I2) has moved up the fault and pooled on top of the uppermost layer of rock. Which event would be considered the youngest?

ANSWER:

Correct

Faults A and B are about the same age, and both are older than the five layers of rock.

Fault A is younger than fault B, and both are older than the five layers of rock.

Faults A and B are about the same age, and both are younger than the five layers of rock.

Fault A is younger than fault B, and both are younger than the five layers of rock.

the principle of original horizontality

the principle of cross­cutting relationships

the principle of intrusive relationships

the principle of superposition

Faulting of rock along F is the youngest event. We know this because all three layers of sedimentary rock have been broken.

The intrusion of I2 is the youngest event. We can know this because I2 sits on top of all other rocks.

Deposition of the three sedimentary layers, S, is the youngest event. We know this because the fault underlies the igneous rocks.

The intrusion of I1 or I2 is the youngest event. Without more information, we cannot know which igneous rock is youngest.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 4/41

SmartFigure: Relative Dating

Launch the SmartFigure Video

When you have finished, answer the questions.

Part A

A sandstone contains inclusions of metamorphic rock. An igneous dike cuts both the sandstone and inclusions. List the rocks from youngest to oldest.

Hint 1.

Use your knowledge regarding the principles of cross­cutting relationships and dating by inclusions to answer this question.

ANSWER:

Correct

Part B

metamorphic rock, igneous dike, sandstone

igneous dike, sandstone, metamorphic rock

metamorphic rock, sandstone, igneous dike

sandstone, metamorphic rock, igneous dike

igneous dike, metamorphic rock, sandstone

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 5/41

If a sequence of sedimentary units is cut by a fault, what does the principle of cross­cutting relationships tell a geologist?

Hint 1.

Recall what the principle cross­cutting relationships states and how it is used for relative age dating.

ANSWER:

Correct

Part C

Which of the following describes the principle of original horizontality?

Hint 1.

The video showed a sequence of folded sedimentary rocks. What had to occur to form this feature?

ANSWER:

Correct

Part D

The sedimentary units on the left side of the fault are the same as those on the right side.

All of the sedimentary units must have been deposited and lithified before being cut by the fault.

The fault is older than the sedimentary sequence.

Sedimentary layers are laid down horizontally.

The oldest sedimentary unit is located at the base of the sequence, while the youngest is at the top.

Inclusions within a sedimentary rock are older than the sedimentary rock itself.

Folded sedimentary layers were originally laid down flat and later deformed.

A fault or dike that cut a sedimentary sequence is younger than the sedimentary rocks it breaks through.

Undeformed sedimentary layers present on one side of a river­cut canyon are the same as those on the opposite side.

The oldest sedimentary unit is located at the base of the sequence, while the youngest is at the top.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 6/41

An undeformed sequence of sedimentary rocks is exposed in a large river canyon. Which two principles would be demonstrated by the rocks?

Hint 1.

Think back to the five principles you learned about in the video. Which two would be the most applicable to an undeformed rock sequence that has been eroded by a large stream?

ANSWER:

Correct

Part E

An igneous dike cuts through limestone, but not through the overlying sandstone. Which of the following statements is most accurate?

Hint 1.

Think about how the principles of superposition and cross­cutting relationships are used for this question.

ANSWER:

Correct

principles of lateral continuity and inclusions

principles of superposition and lateral continuity

principles of cross­cutting relationships and superposition

principles of superposition and dating by inclusions

principles of lateral continuity and cross­cutting relationships

First, the sandstone was laid down, next the limestone was deposited, and finally was cut by the igneous dike.

The limestone and sandstone were deposited and then cut by the igneous dike.

First, the limestone was laid down, then intruded by the igneous dike, and lastly the sandstone was deposited.

The igneous dike represents the oldest rock, while the sedimentary rocks are relatively younger.

First, the limestone was laid down, folded and cut by an igneous dike, and finally the sandstone was deposited.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 7/41

GeoTutor: Constructing an Order of Sequence of Geologic Events ­ Geologic Time Scale

Geologists have divided the whole of history into units of increasing magnitude. This is called the geologic time scale. The entire time scale was originally based on relative dating, since radiometric dating was not available at the time. Absolute dating techniques determine a numerical age of strata given in number of years. Relative dating techniques, on the other hand, determine the age of a stratum relative to other strata (i.e., if it is younger or older), without providing any numerical data. Geologists have been able to determine the relative ages of rocks and any fossils they contain to reconstruct a history that reveals the evolution of Earth’s continents and living organisms using four laws of stratigraphy:

1. Law of Superposition: Younger strata are deposited on top of older strata. 2. Law of Original Horizontality: Strata are deposited horizontally. Tilted strata had been tilted by some geologic event after the time of deposition. 3. Law of Lateral Continuity: Layers of sediment initially extend laterally in all directions. As a result, rocks that are otherwise similar, but are now separated by a valley or other erosional feature, can be assumed to be originally continuous.

4. Law of Cross­Cutting Relationships: Magma intrudes and crystallizes (forming features such as faults and dikes). These features are younger than the strata they cut through.

The geologic time scale subdivides the 4.6­billion­year history of Earth into several units, outlining the time frames of several events of the geologic past. See below for the geologic time scale chart.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 8/41

Part A ­ Laws of stratigraphy

In the figure below, a series of geologic events, A­J, shows the configuration of rocks as seen from a road. Some strata have been tilted, and a volcanic dike has intruded some

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 9/41

of the rocks. Use the laws of stratigraphy to rank these strata.

Rank the strata from oldest to youngest.

Hint 1. The Law of Cross­Cutting Relationships

The volcanic dike (H) must be older than any strata it does not cut through and younger than any strata it does cut through, because the strata it cuts through must have been there before the intrusion of magma.

Hint 2. The Law of Original Horizontality

Pretend the tilted strata are horizontal. That is, “D” is above “A,” “C” is above “A,” and so on. The Law of Original Horizontality states that strata are deposited horizontally in their original states. Tilted strata had been tilted by some geologic event after the time of deposition, but still retain their relative order.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 10/41

All attempts used; correct answer displayed

Notice that the tilted strata are immediately overlain by horizontal strata. This can only occur if erosion has partially removed the tilted strata so they all terminate at the same depth.

Part B ­ The geologic time scale and unconformities

Gaps in the rock record are called unconformities. Unconformities are caused by periods of erosion that have occurred between periods of deposition, which have erased a portion of the rock record. There are three types of unconformities: (1) angular unconformities occur when tilted strata are overlain by horizontal strata—Click here to see an angular unconformity; (2) disconformities occur when strata are separated by an erosional surface—Click here to see a disconformity); (3) nonconformities occur when strata overlay igneous or metamorphic rocks that are resistant to erosion—Click here to see a nonconformity.

Now use the figure below, which has labeled each of the rock strata/layers from Part A with their respective geologic time periods, to fill in the gaps in the following sentences.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 11/41

Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.

Hint 1. How to determine the missing time period

Identify the youngest and oldest strata in the diagram, and use the geologic time scale provided above to find all of the geologic periods between these ages.

Hint 2. The types of unconformities

The volcanic dike terminating abruptly at a stratigraphic boundary would indicate that erosion has occurred.

Hint 3. The age of unconformities

An unconformity must be at least the age of the strata overlying it and can be as old as the strata below it.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 12/41

Correct

The tilting of the Triassic rocks could have occurred in the Triassic, Jurassic, or Cretaceous periods. This amounts to an uncertainty of at least 55 million years.

Interactive Animation: Angular Uncomformities, Noncomformities, and Discomformities

When you have finished, answer the questions.

Help

1. The Quaternary and Tertiary rocks are separated by this type of unconformity: 

a disconformity .

2. Due to an unconformity, the  Jurassic  period is missing from the rock record.

3. The Triassic rocks must have been most likely tilted during or after the  Triassic  period

4. The dike dates at least to the  Quarternary  period.

5. The Triassic and Cretaceous rocks are separated by this type of unconformity: 

an angular unconformity .

Reset

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 13/41

Part A

Which image is an example of an angular unconformity?

SEE IMAGES BELOW FOR ANSWER SELECTIONS.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 14/41

Correct

Part B

In the images below, which contains a disconformity?

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 15/41

Correct

Part C

What does the term unconformity mean?

Hint 1.

un = NOT; conform = go along with

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 16/41

Correct

Part D

In the following rock sequence, how much erosion might have occurred between rock layer A and rock layer B?

ANSWER:

Correct

Part E

What characteristic most directly DISTINGUISHES an angular unconformity from a nonconformity?

Hint 1.

The word angular is the key hint.

ANSWER:

a missing rock layer in a sequence that represents a period of deposition

an extra rock layer that represents a period of deposition

a missing rock layer in a sequence that represents a period of erosion or nondeposition

an extra rock layer that represents a period of erosion

at least 10,000 years

none or only a very small amount (Time does not equate to erosion.)

more time than it took to deposit rock layer B

at least 1 million years

more time than it took to deposit rock layer A

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 17/41

Correct

Part F

Which list best describes the events that would lead to the layering of sedimentary rocks in this diagram?

ANSWER:

Correct

GeoTutor: Constructing an Order of Sequence of Geologic Events – Relative Dating

The ordering of events in geological history has long been a difficult task, but once simple principles were determined observation and logic could be used to determine the order of events. With these principles, one cannot calculate the exact number of years ago an event occurred, but instead the sequence of events can be determined. This is referred to as relative dating. The principles are as follows:

1. The law of superposition: In sedimentary rocks, the rock bed on the bottom must be older than the rock bed on the top. 2. The principle of original horizontality: Sedimentary rocks were originally deposited as flat­lying, horizontal layers.

Angular unconformities represent missing time, whereas nonconformities do not.

Conformities represent missing rock layers.

Nonconformities separate parallel rock layers of the same rock type.

Nonconformities separate two different rock types, whereas angular unconformities form only between strata of the same rock type.

Angular unconformities separate rock layers along nonparallel surfaces.

deposition, erosion, deposition, erosion, deposition

erosion, deformation, erosion, deformation, erosion

deposition, deformation, deposition, deformation, deposition

erosion, deposition, erosion, deposition, erosion, deposition, erosion

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 18/41

3. The principle of cross­cutting relationships: Any rock or feature, cutting through another rock or feature, must be younger than the material through which it cuts. (For example, with faults, igneous intrusions such as dikes, or fractures, the first rock must be there for these secondary features to cut through.)

4. Inclusions: Any rock fragments included within another rock must be older than the rock in which they are included. (For example, if eroded fragments of one rock layer become part of another sedimentary rock layer, the rock with the included fragments must be younger than the fragments themselves.)

Part A ­ Basic Principles for Relative Geologic Dating

Below is a geologic structure that illustrates the various principles of relative dating. You will identify the basic principles used in relative geologic dating by dragging labels to their corresponding targets in the image below.

Drag the appropriate labels to their respective targets.

Hint 1. Inclusions in sedimentary rock layers

According to the principle of inclusions, the layer of rock that has inclusions from another rock layer must be younger.

Hint 2. A dike cutting through sedimentary rock layers

The rock layers that the dike cut through must have been there first. This is the principle of cross­cutting relationships.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 19/41

Correct

As you can see from above, using the logic of these principles when observing sedimentary rock, we can determine a sequence of events.

Now that we have investigated the principles of relative dating, we can use these principles to determine how to read the sequence of geologic events in a location.

Part B ­ Ordering of Geologic Events

The principles of relative dating can be used to understand the order of geologic events. A geologic event can be anything: the deposition of horizontal layers of sedimentary rock, the faulting or folding of rock layers, the tilting of rock layers, the erosion (or wearing away) of rock, the intrusion of volcanic rock within existing rock layers, and so on. Refer to these relative dating principles:

1. Inclusions: Any rock fragments included within another rock must be older than the rock in which they are included. (For example, if eroded fragments of one rock

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 20/41

layer become part of another sedimentary rock layer, the rock with the included fragments must be younger than the fragments themselves.) 2. The principle of cross­cutting relationships: Any rock or feature, cutting through another rock or feature, must be younger than the material through which it cuts. (For example, with faults, igneous intrusions such as dikes, or fractures, the first rock must be there for these secondary features to cut through.)

3. Angular Unconformity: It consists of tilted or folded sedimentary rocks that are overlain by younger, more flat­lying strata. An angular unconformity indicates that during the pause in deposition, a period of deformation (folding or tilting) and erosion occurred.

4. Tilting or deformation could occur to an otherwise horizontally layered sedimentary rocks. Most layers of sediment are deposited in a nearly horizontal position. Thus, when we see rock layers that are folded or tilted, we can assume that they must have been moved into that position by crustal disturbances after their deposition. In such an instance, the tilted structure will be younger than the orginal horizontal layers.

Order the five images below along the timeline based on the sequence of geologic events. To find the oldest, look for the image that shows the least geologic changes. To find the youngest, look for the picture that has the most geologic changes.

Rank from oldest to youngest.

Hint 1. Inclusions from rock layers above and below

In the picture where the gray layer first appears, the layer must be younger than the layers above and below because it has inclusions of both layers of rock within it according to the principle of inclusions. Therefore, this event must have happened after the picture without the gray layer. This can occur when igneous rock intrudes between layers of sedimentary rock and incorporates pieces of the rock layers above and below into the cooling magma.

Hint 2. The oldest and the youngest geologic features/events

The oldest geologic feature should have the least geologic changes and the youngest should have all features from the previous events.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 21/41

All attempts used; correct answer displayed

As you can see, you can apply the logic of the principles of relative dating to successfully sequence the order of geologic events in a scene. The principles allow you to tell the geologic story of a landscape.

Lab Activity 8.2.1 ­ Relative Dating

Now that you have practiced ordering geologic events that occurred within a scene or outcrop, you will relate the five geologic laws to this process. First, apply geologic laws to an outcrop in the order that they are invoked by events within said outcrop. Then examine a second scene, where you will identify the geologic laws that explain the relative orders of pairs of events.

Part A ­ Applying Geologic Laws in Order

Please rank from first to last the geologic laws that are used to determine the relative order of the four events that are labeled (but not ordered) in the drawing of the outcrop below.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 22/41

Please rank the geologic laws used for the history of this outcrop from first to last.

You did not open hints for this part.

ANSWER:

Part B ­ Supporting an Outcrop’s History with Geologic Laws

For each rectangle associated with a pair of geologic structures or events, please identify the name of the geologic law that determines which of the two events within the pair

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 23/41

occurred first.

Drag the appropriate labels to their respective targets.

You did not open hints for this part.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 24/41

Gigapan: Virtual Fieldwork—Relative Dating and Unconformities

Geologists can determine the geologic history of an area by describing rock outcrops and analyzing the layers of rock. Today you will be a geologist visiting a rock outcrop virtually. You will be able to zoom in and out of the Gigapan image to explore the outcrop and determine the relative ages of rock layers and the geologic history of the area by applying your knowledge of the principles of geology and unconformities.

The principles of geology that you will use in this example are:

The law of superposition: A sedimentary rock bed on the bottom must be older than the rock bed on the top. The principle of original horizontality: Sedimentary rocks were originally deposited as flat­lying, horizontal layers. The principle of lateral continuity: Sedimentary layers, when formed, extended horizontally in all directions.

You will also use your knowledge of unconformities, features created when deposition stopped, uplifting and erosion occurred, and, after a period of time, sedimentation began anew above the eroded layer. There are three main types of unconformities:  

A nonconformity is found where igneous or metamorphic rocks have eroded and then sedimentary rock layers are deposited above. A disconformity is a break between parallel sedimentary rock layers above and below. Disconformities represent times when sediments were not deposited or were eroded. An angular unconformity is found where sedimentary layers were tilted and eroded and younger and more flat­laying sedimentary layers were deposited above.  

In this exercise, you will use Gigapan technology to:

become familiar with interpreting rock outcrops, understand the sequence of events that occurred as these rocks formed and changed over time, and identify the location of an unconformity in this outcrop and provide evidence for its type.

Gigapan technology mosaics thousands of photos together into a single image, allowing you to zoom in and see the tiniest of details. Imagine zooming in on a grain of sand on a photo of a beach!

Instructions for all Parts:

1. Launch the Gigapan image http://www.gigapan.com/galleries/10030/gigapans/129421 2. You can zoom into the image to take a close look at the angular unconformity.

Instructions for Part A:

1. Scroll down and click on the  Google Earth link   on the Gigapan site to launch the Gigapan image  in Google Earth. 2. Close the photo by clicking on Exit Photo to see your field site location in Google Earth. 3. Zoom in or out to determine your location. Also, on the upper right side, your will find the north arrow. If “N” is not aligned with “North” move it to North. This will ensure that the alignment of your field site is directly facing you in an east­west direction.

4. You can reopen the Gigapan image by clicking on Angular Unconformity, west of El Paso, Texas on the left pane of Google Earth. 5. Do not close Google Earth.

Part A ­ Locating your field site

As a geologist, you always want to first locate your field site on a map. It helps other geologists to locate the field site for future studies and helps you look for relationships with data from other nearby field sites. Now, determine where you are (your field site) in the world. Choose the map that best locates your field site.http://www.gigapan.com/galleries/10030/gigapans/129421

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 25/41

You did not open hints for this part.

ANSWER:

Instructions for Part B:

1. Go back to the Gigapan image for the Angular Unconformity, west of El Paso, Texas. 2. Examine the outcrop carefully. Make note of any features that would show up on a map (e.g., roads, trees, etc.). 3. Now switch back to Google Earth and zoom in or out to determine how the outcrop is oriented (runs north to south, runs northeast to southwest, etc.) compared to where you are standing and viewing the outcrop. If “N” is not aligned with “North” move it to North.

Part B ­ The orientation of the outcrop

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 26/41

Rock units tell us about Earth’s past, so if we find evidence of geologic processes that have directional components (direction of plate movement, folds and faults, mineral foliation, wind and water currents, etc.), we need to be able to accurately reconstruct those directions. Also, in terms of the scientific method, it helps other geologists to be able to recreate the field investigation step­by­step to confirm or refute any previous findings.

Imagine visiting this outcrop, standing at the location where the Gigapan image was taken, and observing the natural and built features around you. Choose the most accurate representation of the outcrop’s orientation and your vantage point (where you are standing in relation to the outcrop). The representations below depict you and the outcrop as viewed from above. Similar to how you identified the location of this outcrop in the previous part, use Google Earth at a multiple zoom levels. The yellow dot is the point where the Gigapan image was taken.

You did not open hints for this part.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 27/41

Instructions for Parts C and D:

1. Exit Google Earth and go back to the Gigapan image for Angular Unconformity, west of El Paso, Texas. 2. Examine the outcrop carefully, and make note of the orientation of the layers of sedimentation in this image. Are all of the rock layers running in the same direction? Does the formation contain layers running at different angles?

3. Recall that angular unconformities refer to the junction between sedimentary rocks at an angle and rocks that are more horizontal and represent a time when the rocks were uplifted and eroded. Can you see the evidence of uplift and erosion in the image?

Part C ­ Analysis of an outcrop sketch

Where you see layers of sedimentary rock at an angle in contact with rocks that are horizontal, they are separated by a surface called an angular unconformity. This erosion surface represents a time when rocks were eroded before new layers of rock were formed. This can also occur during a pause in deposition, when a period of deformation (such as folding or tilting) has occurred.

Choose the sketch that best represents the rock outcrop.

You did not open hints for this part.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 28/41

Part D ­ Making observations I

Simple yet thoughtful observation exposes the history of an outcrop. The sedimentary rocks in the Gigapan image were formed as sediment accumulated as layers that stacked atop older layers. As layers became lower in the stack sequence and covered by newer layers, they became rocks.

If this area had been under water, the shells of organisms would have become limestone, a rock that can’t be identified visually but can be identified using field­based tests. Underwater movement of sediment may also create mixes of fine and coarse grains. This sediment becomes conglomerate, a rock clearly identifiable given its combined

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 29/41

coarse and fine grains. Over time, some layers would have become exposed as the water retreated and the rock layers above them were eroded. Additionally, some layers would have been tilted by tectonic forces.

Classify the observations according to the rock that they describe, or choose “Not enough information to tell.”

Drag the appropriate items to their respective bins. Each item may be used only once.

You did not open hints for this part.

ANSWER:

Part E ­ Making observations II

Choose the location of the unconformity.

You did not open hints for this part.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 30/41

Part F ­ Making observations III

Now that you have identified the unconformity in this outcrop, can you explain why it is an angular unconformity? Review the statements below, and indicate which are correct.

Select all that apply.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 31/41

You did not open hints for this part.

ANSWER:

Part G ­ Drawing conclusions from the timing of events

Review the outcrop again. Order the specific locations identified in the outcrop by their age. Note where the arrow, square, and circles are located.

Rank the areas identified in the cross section from oldest to youngest.

You did not open hints for this part.

ANSWER:

It is an angular unconformity because layers of sedimentary rock are above and below the unconformity and the layers above and below are not parallel.

It is an angular unconformity because it is at an angle to the ground surface instead of parallel.

The tilting of the layers of rock occurred before erosion of the unconformity surface.

It is an angular unconformity because the layers of sedimentary rock above and below the unconformity are at the same angle.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 32/41

Part H ­ Forming a conclusion: Determining the geologic history of an area from an outcrop

Geologists collect observations from field sites and then summarize their interpretations. It’s your turn to take everything you learned while exploring the rocks in this formation near El Paso, Texas, into a coherent story. Arrange the following geologic events in the order that they occurred.

Rank from oldest to youngest.

You did not open hints for this part.

ANSWER:

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 33/41

Interactive Animation: Radioactive Decay

When you have finished, answer the questions.

Part A

What happens during radioactive decay?

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 34/41

ANSWER:

Part B

What is the scientific definition of half­life?

ANSWER:

Part C

Two containers hold the same radioactive isotope. Container A contains 1000 atoms, and container B contains 500 atoms. Which of the following statements about containers A and B is true?

ANSWER:

Part D

A container holds 100 atoms of an isotope. This isotope has a half­life of 1.5 months. How many total atoms will be in the container after 3 months?

ANSWER:

Daughter isotopes turn into energy.

Parent isotopes turn into energy.

Energy turns into daughter isotopes.

Parent isotopes turn into daughter isotopes.

Daughter isotopes turn into parent isotopes.

the number of parent isotopes that will be lost during a single radioactive decay event

the number of daughter isotopes that will be gained during a single radioactive decay event

the amount of time over which the number of daughter isotopes increases by half

the amount of time over which the number of parent isotopes decreases by half

The rate of decay of atoms in container B is the same as the rate of decay of atoms in container A.

The rate of decay of atoms in container B is greater than the rate of decay of atoms in container A.

The rate of decay of atoms in container A is greater than the rate of decay of atoms in container B.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 35/41

Part E

A container holds 100 atoms of an isotope. This isotope has a half­life of 1.5 months. How many atoms of the radioactive isotope will be in the container after 3 months?

ANSWER:

Part F

A rock sample contains 75 atoms of a parent isotope and 25 atoms of a daughter isotope. The half­life of the parent isotope is 100 years. How old is this rock?

ANSWER:

GeoTutor: Constructing an Order of Sequence of Geologic Events ­ Dating with Radioactivity ­ 2

You probably have read or seen stories about archeological findings that include organic remains of a 1000­year­old mummy or an ancient weapon made from stone, which is an inorganic material. Geologists and paleontologists calculate the age of these organic (contain carbon) and inorganic (do not contain carbon) materials by radiometric dating using the isotopes C­14 and U­235, respectively.

1. C­14 dating: This process is often known as radiocarbon dating. It is used to determine both historical and recent events of archeological artifacts of biological origin such as bone, cloth, wood, and plant fibers.

2. U­235 dating: This is used to determine the age of inorganic substances such as ancient rocks and minerals.

100 atoms

50 atoms

33 atoms

25 atoms

25 atoms

33 atoms

50 atoms

100 atoms

25 years old

50 years old

75 years old

100 years old

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 36/41

Part A ­ Calculating the Age of a Fossil Based on the Number of Half­lives Elapsed

Each isotope has a unique half­life. The half­life of an isotope is the time taken for half of the starting quantity to decay (with a ratio of 1:1). After two half­lives, there will be one­ fourth of the original parent sample and three­quarters would have decayed to the daughter product (with a ratio of 1:3). After three half­lives, the ratio becomes 1:7, and so forth.

The graph, for instance, shows that assuming the half­life of a sample is 4 months, then in 4 months, there will be 0.5 gram of the parent element and 0.5 gram of the daughter element will be produced. In month 8 (which is two­half­lives), there will be only 0.25 gram of parent element left and 0.75 gram of daughter element; that is, one­fourth of the parent sample (in red) is left, and in month 12, there is only one­eighth of the parent element.

You attend a geology lab where you are asked to estimate the age of a fossil. The ratio of parent to daughter elements in the fossil sample is 1:7. You know that fossils are the remains of living organisms, which have some amount of C­14 isotope. The C­14 isotope, which has a half­life of 5730 years, begins to decay as the organism dies.

What would be your estimation of the fossil’s age?

You did not open hints for this part.

ANSWER:

22,920

5730

2865

11,460

40,110

17,190

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 37/41

Part B ­ Radiometric Dating of Organic and Inorganic materials

John is assisting a geologist who has traveled across the world and collected a few samples. He asks John to classify the samples that can be dated using carbon­14 and uranium­235 (or U­235). All organic materials contain carbon and are dated using C­14; inorganic materials are dated using any radioactive element, such as uranium, rubidium, potassium, and thorium, except carbon. Now, help John group the samples.

Drag the appropriate items to their respective bins. Each item may be used only once.

You did not open hints for this part.

ANSWER:

Chapter 18 Reading Quiz Question 2

Part A

Which geological principle states that even if most sedimentary rock layers are presently folded, they were deformed after deposition?

You did not open hints for this part.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 38/41

ANSWER:

Chapter 18 Problem 1 Multiple Choice

Part A

An unconformity is a buried ________.

ANSWER:

Chapter 18 Problem 2 Multiple Choice

Part A

Which of the following best characterizes an angular unconformity?

ANSWER:

principle of original horizontality

law of superposition

principle of cross­cutting relationships

principle of unconformities

principle of inclusions

surface of erosion separating younger strata above from older strata below

surface of erosion with older strata above and younger strata below

fault or fracture with older rocks above and younger rocks below

fault or fracture with younger strata above and older strata below

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 39/41

Chapter 18 Problem 6 Multiple Choice

Part A

By applying the law of superposition ________ dates can be determined.

ANSWER:

Chapter 18 Problem 9 Multiple Choice

Part A

Sandstone strata and a mass of granite are observed to be in contact. Which of the following statements is correct geologically?

ANSWER:

Tilted strata lie below the unconformity, and bedding in younger strata above is parallel to the unconformity.

Horizontal lava flows lie below the unconformity, and horizontal, sedimentary strata lie above.

It is the discordant boundary between older strata and an intrusive body of granite.

Tilted strata lie below the unconformity with loose, unconsolidated soil above.

conventional

radiometric

relative

both relative and radiometric

The sandstone is younger if the granite contains sandstone inclusions.

The granite is older if the sandstone contains pebbles of the granite.

The granite is older if it contains inclusions of sandstone.

The sandstone is younger if it shows evidence of contact metamorphism.

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 40/41

Chapter 18 Problem 28 True/False

Part A

A disconformity is an erosional unconformity with parallel beds or strata above and below.

ANSWER:

Chapter 18 Problem 12 Multiple Choice

Part A

A worm would stand a poor chance of being fossilized because ________.

ANSWER:

Chapter 18 Problem 51 Short Answer

Part A

The remains or traces of prehistoric life are called ________.

ANSWER:

True

False

worms have been rare during the geologic past

worms have no hard parts

worms contain no carbon­14

all of these

2/26/2016 Homework 5 Geologic Time

https://session.masteringgeology.com/myct/assignmentPrintView?assignmentID=1211587 41/41

Chapter 18 Problem 16 Multiple Choice

Part A

Which of the following is not a very long­lived, radioactive isotope?

ANSWER:

Score Summary: Your score on this assignment is 47.1%. You received 7.06 out of a possible total of 15 points, plus 0 points of extra credit.

C­14

K­40

U­238

Rb­87

Categories
Assignment Help buy coursework custom dissertation writing write my dissertation for me

what can be inferred by the passage of the black codes

1.What can be inferred by the passage of the Black Codes
A.Many Southerners were willing to allow African-Americans equally
B.Many white Southerners wanted African Americans to remain as slaves
C.Many white Southerners wanted African Americans to receive equal education
D.Southerns lawmakers wanted to separate but equal the rights

  1. Which of the following groups support radical reconstruction
    A.Business people interested in rebuilding
    B.Newly freed African-Americans
    C.Rich white landowners
    D.ScalaWags
  2. After the passage of 13 14 and 15 amendments why did African Americans continue to experience political oppression.
    A. The amendments we’re not intended to exclusively solve African-American problems
    B. Southerners little leatrice trated and Tack Jim Crow laws
    C. Many African Americans did not trust that the Amendments would be upheld
    D. Poor Communications kept African Americans from learning about their rights
  3. Which of the following is a major example of Abraham Lincoln’s policy of Ling see towards the defeat South
    A. President Lincoln will nuses to have a federal government assume responsibility of confederate government debts
    B. President Lincoln choice to have Southerners as his vice president in the 18 64 election
    C. President Lincoln’s decision that Southerners state governments could recognize after 10% of the voters took a loyalty oath in the Union
    D. President Lincoln’s decision to extend the Emancipation Proclamtion to include all states
  4. Arrange the following legalist in that was passed after the Civil War and proper chronological order.
    A. I.,II.,III.,IV
    B. I.,II.,IV.,III
    C. II.,I.,III.,IV
    D. III.,IV.,II.,I.
    Why was President Lincoln unable to persuade Congress to accept his redstruction plan
    A. President Lincoln’s Plan did not follow Northerners to vote on the registration Act
    B. Congress believe that Freedoms Bureau should be responsible for reconstruction
    C. Congress believed President Lincoln’s Plan was too difficult for the South
    D. President Lincoln was assassinated before he was able to persuade Congress
  5. What did President Johnson believed reconstruction should accomplish.
    A. That rich white Southerners landowners would not return to power
    B. That the South would return to its pre-war system without slavery
    C. That politics and civil rights of Freedom would be granted
    D. That the South would remain as conquered Nation
  6. According to the ruling in the Plessy versus freguson case why was segregation acceptable
    A. Segeregation with legal because African Americans were not citizens
    B. Segregegation was legal as long as the finances for Black and Whites Segregation
    C. Segregation was acceptable in private facilities only
    D. Segregation who’s acceptable won a state-by-state basic 1 1 2,681
    asked by Ash
    Feb 7, 2018
    I’ll be glad to check your answers. 0 2
    👩‍🏫
    Ms. Sue
    Feb 7, 2018
    I need answer please if I don’t pass this my grade will a an F 3 0
    posted by Ash
    Feb 7, 2018
    Maybe next time you’ll study so that you actually learn something. 2 30
    👩‍🏫
    Ms. Sue
    Feb 7, 2018
    Omg I’m on the same thing and I need help on the first question lol 0 0
    posted by Ineedanswers
    Feb 9, 2018

What’s 3, the only one I don’t know.

0 1
posted by ok
Feb 9, 2018
Yall are !@#$%^&hhhesss for not sharing ur answers so i’ll do the favor

1.B
2.A,B,&D
3.B
4.C
5.C
6.D
7.A
8.B
9.Essay

41 1
posted by bestanswers
Feb 12, 2018
Thank bestanswers! i hate it when people say they’ll check the answers then never do!

2 0
posted by Giggles
Feb 12, 2018
i swear none of yall share yall answer

1 0
posted by gfutf bjfvyghvhg
Feb 13, 2018
he is right

2 0
posted by gfutf bjfvyghvhg
Feb 13, 2018

YOU ARE THE BEST “BESTANSWERS”

1 0
posted by Ash
Feb 13, 2018
THANK YOU bestanswers! you are truly a saint.

1 0
posted by blueblue
Mar 9, 2018
We teachers are not accepting cheating anymore. We will be 1pting out perfect scores and finding cheaters! Do not use this site or you will flunk the class that is a promise.

0 21
posted by Teacher
Apr 4, 2018
I think “Teachers” can spell a little better than you can Mrs. “Teacher”

10 1
posted by This one here on another level
Apr 9, 2018
Thank dude

1 0
posted by thanks best answers!!
Apr 13, 2018

Stop using this site!

1 21
posted by Mrs. Garner
Jan 31, 2019
those teachers can stop commenting on here

3 0
posted by student
Mar 11, 2019
8 is B

0 0
posted by Fayth
Mar 22, 2019
Contrary to popular belief, Ms. Sue, some kids do study and still need help with tests. Speaking from experience, as I have stayed up for hours upon hours trying to take in chapters upon chapters of dumb history I’ll never need to know!

Ash, if you did study and you still cannot understand, may I suggest a tutor? Ms. Sue is a very discouraging person, and she is a terrible teacher from what I can tell. If you ever do need help with something, do not be afraid to ask someone who will actually help you.

And Ms. Sue. You absolutely suck. Your attitude towards students is cruel, and discouraging. You seem to lack empathy, and apathy. Ash simply needed help to find the answers, and you as a teacher have failed to do that. For someone who is most likely very much older than us all, you have the mentality, Mannerisms, and politeness of a child. Do us all a favor and grow the heck up. Because, despite your advantage of so many more years on this planet than us, you have failed to do so.

6 0
posted by Bug Boy
Apr 12, 2019
You said it Bug Boy

1 0
posted by Unknown
Apr 12, 2019

Bug Boy went off of that thot bruh

5 0
posted by Yikes
Apr 17, 2019
Thanks so much guys. I never can understand history and I study a lot but I still make bad grades. So thanks Bug Boy for standing up for us kids. And thank you Best Answer for helping.

1 0
posted by ThisIsIt
Apr 17, 2019
ms sue a thot

1 0
posted by lmao
Apr 18, 2019

Categories
buy coursework cheap dissertation writing services dissertation writing services write my dissertation for me

find the sum of the interior angles of a nonagon


  1. Find the sum of the interior angles of a nonagon. (1 point)

140°
1,620°
1,260°
1,450°


  1. Find the measure of each interior angle of a polygon with 12 sides. (1 point)

1,800°
150°
180°
145°


  1. Four of the angles of a pentagon measure 85°, 110°, 135°, and 95°. Find the measure of the missing angle. (1 point)

115°
95°
135°
85°

My answers:

  1. 1,260°
  2. 150°
  3. 115° 1 0 2,386
    asked by Delilah
    Feb 5, 2013
    All are right. 1 0
    👩‍🏫
    Ms. Sue
    Feb 5, 2013
    2.
    Find the sum of the interior angles of a nonagon. (1 point)

140°
1,620°
1,260°
1,450°

When you walk all the way around a figure with straight sides clockwise you turn 360 degrees. Ech of your right turns is 180 – interior angle there

in this case 9 * right turn angle = 360
right turn angle = 40
so each interior angle is 180 – 40 = 140
9* 140 = 1260

4.
Same deal for the next one
360/ 12 = 30
180 – 30 = 150 = interior angle

5.
each exterior angle = 180 – angle
180 – 85 = 95
180 – 110 = 70
180 – 135 = 45
180 – 45 = 85
then we have (180-x)
95+70+45+85 +180 – x = 360
475 – x = 360
x = 115

1 1
posted by Damon
Feb 5, 2013
Those answer are all correct, good job.

0 0
posted by Ms. Smart
Feb 10, 2017
Connexus answers

  1. B
  2. C
  3. A
  4. B
  5. A
  6. C
  7. D
  8. C
  9. B
  10. D
  11. C
  12. You have to do that one yourself it’s a writen answer. 8 1
    posted by Allison
    Feb 3, 2019

Thank you Allison

0 0
posted by UnaLoca
Feb 4, 2019
Nice job Allison! Those answers are 100%

0 0
posted by MarineCat6
Feb 12, 2019

Categories
essay help professional dissertation writers write my dissertation for me

aama code of ethics

Lewis, M.A., & Tamparo, C. D. (2012). Medical law, ethics, and bioethics for the health professions. Philadelphia: F. A. Davis.

CHAPTER 1

Medical Law, Ethics, and Bioethics

CHAPTER2

Medical Practice Management

CHAPTER3

Health-Care Team in the Ambulatory Setting

KEY TERMS

Medical Law, Ethics, and Bioethics

((The aim of education is the knowledge, not of facts,

but of values.” -William Ralph lnge ( 1860-1954 ); Church of England

clergyman, scholar, and critic

hospitalist Individual who assumes the care of hospitalized individuals in place of their primary care provider.

internal milieu Internal environment. pluralistic Referring to numerous distinct ethnic, religious, and cultural groups that coexist in society.

LEARNING OUTCOMES Upon successful completion of this chapter, you will be able to: 1.1 Define key terms. 1.2 Compare medical law, ethics, and bioethics. 1.3 Discuss some bioethical issues in medicine. 1.4 Explain the importance of medical law, ethics , and bioethics in the practice of medicine. 1.5 List and discuss at least three ethical codes. 1.6 Describe the American Association of Medical Assistants (AAMA) Code of Ethics. 1.7 Interpret the AAMA Creed . 1.8 Compare/ contrast the AAMA and the American Medical Association (AMA) codes of ethics. 1.9 Describe the Patient Bill of Rights. 1.10 Explain the Ethics Check questions. 1.11 Describe characteristics that are important for a professional health-care employee.

COMPETENCIES COMMISSION ON ACCREDITATION OF ALLIED HEALTH EDUCATION PROGRAMS {CAAHEP) • Summarize the Patient Bill of Rights. (CAAHEP IX.C.4) • Differentiate between legal , ethical, and moral issues affecting health care. (CAAHEP X.C.1) • Compare personal, professional, and organizational ethics. (CAAHEP X.C.2) • IdentifY the effect pe,rsonal ethics may have on professional performance. (CAAHEP X.C.S) • Incorporate the Patient’s Bill of Rights into personal practice and medical office policies and

procedures. (CAAHEP IX.P.S)

2

Chapter 1 Medical law, Ethics, and Bioethics

• Develop a plan for separation of personal and professional eth ics. (CAAHEP X.P.2) • Apply ethica l behaviors, including honesty/ integrity in performance of med ical assisting practice.

(CAAHEP X.A.1) • Examine the impact personal eth ics and morals may have on the ind ividua l’s practice.

(CAAHEP X.A.2)

ACCREDITING BUREAU OF HEALTH EDUCATION SCHOOLS (ABHES) • Being cognizant of eth ica l boundaries. (ASHES 11.b.4) • Analyze the effect of hereditary, cultural and environmental influences . (AS HES S.g)

Are You a Professional? A certified medical assistant (CMA) employed by an obstetrician/ gynecologist calls her former medical assistant instructor to inform her of an opening for a clinical assistant in the obstetrics and gynecology (OB-GYN) clinic. After describing the position and its responsibilities, the CMA says, “We really need another person in the clinical area. I’m the doctor’s only nurse.”

Surprised by the comment, the instructor inquires, “When did you go back to school to become a nurse?”

She replies, “Oh, I didn’ t, but everyone thinks I am his nurse. I do everything a nurse does.”

The title of this text, Medical Law, Ethics, and Bioethics for the Health Professions, presents three distinct topics: medical law, ethics, and bioethics. Such distinction, however, is for the sake of clarity. Discussion of any one of these topics will include the others. Any study of health law will surface themes of ethics and bioethics. Conversely, discussing ethics and bioethics without considering the law is futile.

LAW

Laws are societal rules or regulations that are prudent or obligatory to observe. Failure to observe the law is punishable by the government and/ or law enforcement agencies. Laws are designed to protect the welfare and safety of society and to resolve conflicts in an orderly and nonviolent manner. They constantly evolve in accordance with an increasingly pluralistic society. Laws have governed humankind and the practice of medicine for thousands of years. Today federal and state govern- ments have constitutional authority to create and enforce laws. A brief look at these laws, their sources, and their definitions appears in subsequent chapters.

Medical law is essential in regulating licensure of health-care professionals and institutions, pro- viding for client safety, protecting the client-provider relationship, and identifying liability for health-care professionals and institutions. Health law also regulates insurance and managed care as well as federal public health programs. It also has established standards for reproduction and birth issues as well as life and death decisions.

ETHICS

Ethics is a set of moral standards or a code for behavior to govern an individual’s interactions with other individuals and within society. Joseph Fletcher (1905-1991), an American professor who pio- neered in the field ofbioethics, differentiates morals from ethics, stating, “‘morality’ is what people do in fact believe to be right and good, while ‘ethics’ is a critical reflection about morality and the

4 Unit I Understanding the Basics

rational analysis of it.” According to Fletcher, for example, “Should I terminate pregnancy?” is a moral question, whereas “How should I go about deciding?” is an ethical concern.

Although laws are more apt to be rules applied to and observed by all, different cultures have different moral codes. Cultural differences exist relative to age, gender, sexual orientation, ethnic heritage, educational preparation, life experiences, spiritual influences, role models and mentors, economics, values, internal milieu, and health and illness. Every standard for ethics is culture-bound. Therefore, there are few if any universal truths in ethics because it is difficult to identifY customs as being either correct or incorrect. It is also true that one person’s moral code has no special status relative to another person’s moral code; it is only one among many. See Chapter 12, A Cultural Per- spective for Health Professionals, for further discussion on the influence of culture.

Ethical standards can be personal, organizational, institutional, or worldwide. Ethics refers to the various codes of conduct that have been established through the years by members of many pro- fessional organizations, including the medical profession. A number of medical codes appear in the appendices and on DavisPlus.

BIOETHICS

Bioethics refers to the ethical implications of biomedical technology and its practices. Bio refers to life, and issues in bioethics are often life-and-death issues. Edmund D. Pellegrino, Professor Emeritus of Medicine and Medical Ethics at Georgetown University, states that “bioethics, still in its infancy, is routinely called on by the government to provide political cover for controversial public health decisions involving the life and death of Americans.” In other words, political leaders often look to bioethical discussions to guide them in making decisions regarding controversial public health issues. Specialists in the field ofbioethics provide the platform for this decision making.

Since former President Clinton established a National Bioethics Advisory Commission (NBAC) in 1995, subsequent presidents have established their own commission to provide input to the pres- ident and national leaders on issues ofbioethics. In April2010, President Barack Obama appointed members to his Presidential Commission for the Study ofBioethical Issues. Obama mandated that this Commission address potential bioethical issues through advancements in biomedicine and “related areas of science and technology.” The Commission plays a key role in keeping the President informed about bioethical issues.

The challenge to bioethics created by modern medicine and research in the past few decades is staggering. Rapid changes in medicine and technology offer unique and sometimes overwhelming choices to clients and their families. Consumers more actively involved in their health care and quite knowledgeable of medical technology and its implications question medical professionals as they have never before been questioned. The public carefully scrutinizes medical technology and how it relates to their daily lives. Thus, the application ofbioethics in everyday life provides opportunities, challenges, enthusiasm, and sometimes difficult choices.

COMPARING MEDICAl lAW, ETHICS, AND BIOETHICS

Law, ethics, and bioethics are different yet related concepts. Laws are mandatory rules to which all citizens must adhere or risk civil or criminal liability. Ethics often relate to morals and set forth uni- versal goals to try to meet, but there is no temporal penalty for failing to meet ethical goals as there is apt to be in law. However, law in the United States has been and continues to be a driving force in shaping ethics.

Confusion over the interpretation oflaw, ethics, and bioethics is understandable. They sometimes conflict. Consider the following example for further clarification:

The U.S. Supreme Court addressed the issue of abortion in Roe v Wade, 410 U.S. 113, 1973. The law states that during the first trimester, pregnant women have a constitutional right to abortions, and the state has no vested interest in regulating them at this time. During the second trimester, the state may regulate abortions and insist on reasonable standards of medical practice if an abortion

Chapter 1 Medical Law, Ethics, and Bioethics 5

is to be performed. During the third trimester, the state’s interests override pregnant women’s rights to abortions, and the state may deny abortion except when necessary to preserve the health or life of the mother.

The personal ethics of a provider or health-care professional may dictate non participation in an abortion or any abortion-related activities. Bioethics and the allocation of scarce resources are evi- denced by some state statutes that have denied the use of state funds for an abortion or strive to make abortions less available. As demonstrated by this example, sometimes law, ethics, andbioethics conflict.

IN THE NEWS

As a result of two U.S. Supreme Court rulings that prohibit parents from havi ng a bsolute veto over their daughters’ decision to have an a bortio n, many state

legislatures rushed to tighten controls on abortions . As of 2011, only Washingto n, Oregon , New Yo rk, Vermont, Connecticut, Hawaii , Ma in e, and Washingto n DC had no pare nta l notifi- cation or consent laws related to minors seeking abortion (see Fig. 1-1 ). Thirty-six states re- quire some involvement in a minor’s dec is ion; 22 states require parental consent, 10 states req uire only parenta l notification , and 4 states require both parental consent and notification . This information changes yearly as state legislative bodies struggle to exercise control over a bortions in their state. Sometimes, such legislation is later overt urned by the U.S. Supreme Court . Legal attempts continue the move to rescind Roe v Wade.

Figure 1-1. U.S. map showing states requ iring no parent notification and/or consent for a minor’s abortion.

THE IMPORTANCE OF MEDICAl lAW, ETHICS, AND BIOETHICS

There are many reasons that make medical law, ethics, and bioethics important for health-care pro- fessionals. It is necessary to follow health-care laws and to examine one’s actions in light of both laws and ethics. It is helpful to learn more from the bioethical issues that clients face and to appre- ciate differences in moral reasoning among individuals and various cultures. Also, there is the need to confront personal biases and bigotry.

6 Unit I Understanding the Basics

In addition, there are political and economic factors that are relevant to the importance of medical law, ethics, and bioethics. They include:

• Demands of society for quality health care at minimal personal cost • The debate over whether health care is a right or a privilege • The equality of the distribution of and access to emerging medical technology • The controversy among the political arena, national health-care reform, and the consumer

over who pays for health care and how it is paid • The powerful role of medical insurance and managed care.

Thoughtful consideration of the reasons identified here as well as the political and economic factors fosters mature decision making and quality health care for clients.

TODAY’S HEALTH-CARE CLIMATE

There is much in today’s health-care environment to challenge any health-care professional’s ethics, values, and practices. Just a few are identified here for reflection.

• Consumers are bombarded with medical information. The media, both printed and elec- tronic, report on many aspects of health care. This immediate access of information empow- ers consumers to ask more questions of medical professionals, allowing them to be better informed about choices.

• Increasingly, hospitals and ambulatory care centers are establishing ethics committees and/or institutional review boards (IREs) that enable community resource persons, educators, and providers to grapple with ethical dilemmas both before and after they occur in the clinical setting. Laws and ethical standards designed to protect clients and establish guidelines for the medical community represent an effort to create a climate for an equitable exchange between client and provider. The primary goal of an ethics committee is to have a plan in place before a crisis occurs. IRBs have been empowered by the U.S. Food and Drug Adminis- tration (FDA) and the Department of Health and Human Services (DHHS) to monitor, review, and oversee any medical research involving human subjects. An IRB is required if there is either direct or indirect support from the DHHS.

• Medical technology is advancing at a more rapid rate than legal and ethical standards can address. Consider the time without antibiotics, when premature infants died due to lack of neonatal intensive care and when invasive surgery rather than a computed tomography scan was the only method to reveal problems with internal organs. There are a number of medical advances likely to occur in the next decade. Many may come with a flurry of ethi- cal and bioethical implications that will create debate in the medical community. They include: • Restoring irreversibly damaged hearts by replacing dead heart muscle with new laboratory-

grown muscle after a heart attack • Using harvested skin cells obtained through a small biopsy and suspended in a solution to

be sprayed directly _onto a major burn area. These cells rapidly divide to cover the wound up to 80 times larger than the donor site

• Using computer-assisted therapy sessions to identify depression and excessively negative thoughts in the treatment of clients

• Using high-technology brain scans to detect the earliest signs of both plaques and tangles found in Alzheimer disease and using a vaccine to stimulate the body’s own immune response to wipe out the plaques once identified

• Increasing numbers of specialists in medicine make it more difficult to coordinate client care. It is quite conceivable that a client has a primary care provider, a neurologist, a nephrologist, and an oncologist, all providing care. If hospitalization is necessary, is the pri- mary care provider or a hospitalist in charge? Who coordinates, and who approves care? Who decides the appropriate course of action in the case of conflicting medical opinions?

Chapter 1 Medical law, Ethics, and Bioethics

Although specialization may enhance quality health care, it demands greater coordination for clients to benefit, and it increases the cost of medical care. Managed care policies and providers will in part dictate how medical choices are made.

• Costs of medical care have risen exponentially. In 1940, a normal infant delivery cost

7

$35 for 10 days of inpatient hospital care. The delivering physician received an additional $35. In 1990, a normal delivery cost an average of $3300 for a 2- to 3-day inpatient hospital stay. In 2005, hospitalization for normal delivery and a 1- to 2-day hospital stay was $5200. The factors affecting the cost of a birth are: whether it is a vaginal or cesarean delivery, if there are complications, and the length of the hospital stay. Infant delivery is most expen- sive in the Northeast and on the West coast and least expensive in the South. In 2010, the typical cost of a vaginal delivery without complications ranged from about $9000 to $17,000 or more. The typical cost for a cesarean delivery without complications or a vaginal delivery with complications ranged from $14,000 to $25,000 or more. .

The importance of these issues is further evidenced by the struggle that has been made through the past couple of decades to pass some form of a national health-care reform in the nation’s capital. It finally happened in 2010, but not without a great deal of political maneuvering and posturing.

ETHICAL ISSUES IN MODERN MEDICINE

Many situations arise in the practice of medicine and in medical research that present problems requiring moral decisions. A few of these can be illustrated by the following questions.

Should a parent be able to refuse a mandated immunization for his or her child? Does public safety supersede an individual’s right? Is basic health care a right or a privilege? Who dictates client care- the client, the provider, or the health insurance company? Who pays for the care of children with very serious and life-threatening birth defects? Should more medical attention be paid to a “cure” or for “prevention?” How should legal abortions be funded? Is it important that everyone receive equal treatment in medical care? What are the issues related to prolonging life or assisted death for individuals with terminal illnesses? What criteria determine who receives donor organs? Should stem cell research be limited or advanced?

None of these questions has an easy answer, and most individuals do not even think about them unless suddenly and personally faced with one or more of them. These questions and other possi- bilities are the reason for entering into a discussion of pertinent bioethical issues. For some, answers can be found in ethical codes.

CODES OF ETHICS

For generations ethical codes have been written to further clarify medical law and ethics. Many codes have become law. Professional codes have evolved throughout history as practitioners grappled with various ethical and bioethical issues. Increasingly, groups of medical professionals have defined how members of their profession ought to behave. Below are a few examples.

The Hippocratic Oath (see Appendix 1), although not prominent in medical schools today, still carries significant weight among the medical community. The oath, which was first written in the fifth century B.C., was Christianized in the lOth or 11th century A.D. to eliminate reference to pagan gods. The Hippocratic Oath protected the rights of clients and appealed to the inner and finer instincts of the physician without imposing penalties.

The Geneva Convention Code of Medical Ethics, established by the World Medical Association in 1949, is similar to the Hippocratic Oath. This code refers to colleagues as brothers and states that religion, race, and other such factors are not a consideration for care of the total person. This code reflects the fact that medicine was becoming available to all during this era.

The Nuremberg Code was established between 1946 and 1949 as a result of the trials of war criminals after World War II. This code suggests guidelines for human experimentation and is

8 Unit I Understanding the Basics

directed to the world. The writers hoped that the code would ensure the safety of humans in the years to come.

The Declaration ofHelsink1~ written between 1964 and 1975, is an update on human experimen- tation. Much more detailed than the Nuremberg Code, it includes guidelines for both therapeutic and scientific clinical research. Unlike the Nuremberg Code, the Declaration of Helsinki is directed to the world of medicine rather than the world at large.

The American Medical Association (AMA) established the Principles of Medical Ethics in 1847 and updated it in 1957, 1980, and again in 2001 (see Appendix 1). The preamble and nine princi- ples have served as guidelines for physicians for many years. The document “Current Opinions of the Judicial Council of the American Medical Association” is intended as an adjunct to the revised Principles of Medical Ethics. Both documents are pertinent to physicians and their assis- tants today.

The number of professional medical organizations with written ethics codes is numerous. The codes are available on the Internet by searching the particular association and then for its code of ethics. A few are identified here:

• American Academy of Professional Coders (AAPC) • International Medical Informatics Association (IMIA) • National Association of Emergency Medical Technicians (NAEMT) • American Osteopathic Association (AOA) • American Association of Naturopathic Physicians (AANP) • American Chiropractic Association (ACA) • National Certification Commission for Acupuncture and Oriental Medicine (NCCAOM) • National Medical Association (NMA) • American Nurses Association (ANA)

By far the most important code directed to the ambulatory care professional is the AAMA Medical Assistant Code of Ethics and AAMA Medical Assistant Creed directed to the medical assistant (MA) in the ambulatory setting (see Appendix 1). The code was adopted by the American Association of Medical Assistants and appears in its constitution and bylaws. It provides guidelines to assist MAs in serving their profession in an ethical and professional manner. This code, as well as most other ethical codes, identifies to society at large what the standards are for the profession.

A number of codes have appeared that deal more with the rights of clients than the responsibil- ities and guidelines for health-care providers. They include numerous Patient Bill of Rights estab- lished by the American Hospital Association (AHA) and federal and state governments as well as individual hospitals and institutions. Contact the hospital nearest you for a sample of a patient bill of rights, or refer to DavisPlus for the sample from the AHA; they are all quite similar in content. Increasing in popularity are patient bills of rights specific for ambulatory health care. They are usu- ally written by specific clinics and generally include the right to be respected, right to access your medical record, right to receive a second opinion, right to participate in your health care, and the right to have your privacy protected at all times. A number of samples can be seen on the Internet by searching for entities such as the Cleveland Clinic and the Mayo Clinic.

The 2010 Healthcare Reform Bill includes a Patient Bill of Rights that has an entirely different scope. This portion of the bill is designed to ensure that there is affordable health care for everyone; it is designed to put consumers back in charge of their health coverage and prevent insurance carriers from certain practices to ban clients from coverage. The purpose of any patient bill of rights is to make certain clients know their rights. It can be helpful to recognize that in some cases clients always had these rights but were not aware of them.

The most challenging aspect of any ethical code is its personal application. Many books have been written on the subject, and decades of scholarly debate have sought effective criteria for making ethical decisions. No one method is the result. What is certain, however, is that how each individual makes an ethical decision is very personal. The Ethics Check questions identified below may be helpful as you begin to think about medical law, ethics, and bioethics as a health- care professional. ·

Chapter 1 Medical Law, Ethics, and Bioethics

ETHICS CHECI< Blanchard and Peale, in The Power of Ethical Management, developed a set of questions to serve as an “ethics check” that is a useful tool for a person facing an ethical dilemma. These

questions suggest that ethics is a very personal concept and a personal decision. Consider Blanchard and Peale’s three questions to include in a personal code of ethics:

1. Is it legal or in accordance with institutional or company policy? 2. Does it promote a win-win situation with as many individuals (client/employee/employer)

as possible? 3. How would I feel about myself ifi read about my decision or action in the daily newspaper?

How would my family feel? Could I look myself in the mirror? (Fig. 1-2.) e According to Blanchard and Peale, if the answer to any one of the three questions is no, consider

the action unethical. If the answer to all three questions is yes, the action is ethical. The identification of such a simple personal code of ethics can help to clarify actions, and these Ethics Check questions may provide further guidelines on how to act when in a difficult situation.

An individual will have greater difficulties remaining ethical in an organization in which the highest leaders are not ethical in their actions. It helps if the leader of a group is ethical, setting the standard and making it easier for everyone else to be ethical. However, ethical actions may and should come from anyone, regardless of status.

Case Study You are the clinic manager in a large multi provider medical center. There is no upward mobil- ity in this center, and you relish a new challenge. It is a rather slow day, and you use your office computer to access the Internet to do a job search. You find four jobs that are exciting, and you send your resume via the Internet. As you disconnect from the Internet, you recall that it is easy to trace access to sites on the Internet that you have just used for personal business.

Apply the Ethics Check to this case study. What is your conclusion?

Figure 1-2. Ethics Check question: How would I feel if I saw my decision in the newspaper?

10 Unit I Understanding the Basics

APPLYING MEDICAL LAW, ETHICS, AND BIOETHICS AS A PROFESSIONAL HEALTH-CARE EMPLOYEE

The significant conflict that often arises among medical law, ethics, and bioethics mandates that individuals choosing the health professions be people of high moral standards. They should be clear, open, and knowledgeable about their personal choices and beliefs and be able to recognize vast diversity in a pluralistic society. Health-care professionals must feel comfortable in a “servant” role while maintaining their own integrity and the respect of their clients.

Individuals employed in a service-oriented industry such as health care are expected to have cer- tain characteristics. The health professional must always be tactful and should know instinctively when speaking is wise and when listening is better. The health-care employee is an important com- munication link between the client and the provider.

Anyone in a health-care profession is in a nonreciprocal relationship with clients. The professional serves the client and gives the client full respect even when the client is disrespectful. Health-care professionals will want to act and speak nonjudgmentally of their clients and their activities, offering information rather than opinions. Clients expect to be treated with courtesy and understanding. Only the most caring and sensitive of employees can handle day after day of sick, hurting, and com- plaining clients and remain objective yet compassionate and positive.

Physician- and provider-employers require that their employees be diligent and knowledgeable in every detail of the job. Such knowledge and training can come only through professional prepa- ration that is demanding and exacting and continues throughout employment. Professionals who are flexible and take initiative will be an asset to their employers.

Honesty and integrity are traits required of the employee. Health-care professionals must always remember to practice only within the scope of their professional training and never misrepresent themselves. Confidentiality must be tenaciously protected, and both the clients’ and the providers’ best interests must be guarded.

Wise and prudent health-care employees will select employers for whom they have respect and to whom they can remain loyal. Matching your personal understanding of how to care for clients to that of your employer avoids conflicts at a later time. The majority of health-care professionals have a concern for quality health care, and that concern is often reflected in community efforts and contributions.

Refer to the following Case Law that illustrates a disregard of personal and professional ethics on the part of a medical provider.

Case Law A physician in Lehi, Utah was accused in August 2009 of the following: 1. Fondling his female medical assistant (MA) while pretending to teach her how to diagnose

heart murmurs (Civil Suit) 2. Two counts of forcible sex abuse (Criminal Case) 3. Two counts of voyeurism (Criminal Case) 4. One count of obstruction of justice (Criminal Case)

Dr. Steven Pack also faces an investigation by the Division of Occupational and Professional Licensing.

Dr. Pack allegedly called his 18-year-old MA to an examination room to teach her how to diagnose heart murmurs. He asked her to lie on an examination table, lifted her shirt and bra, and fondled her breasts as he told her he was “feeling” for heart murmurs. Pack allegedly again inappropriately touched the woman while teaching her how to use a heart monitor and elec- trocardiograph machine. The MA became upset and told a nurse practitioner at the office what happened. This civil lawsuit comes 1 day after Lehi police arrested Pack for allegedly recording

Chapter 1 Medical Law, Ethics, and Bioethics

with a concealed digital camera his female patients undressing in an examination room. In August 2010, Judge Samuel McVey sentenced Steven Pack to 1 year in jail without any early release and a second year with global positioning system (GPS) monitoring. Pack’s license to practice was suspended by the Utah Division of Occupational and Professional Licensing. Civil suits brought by the victims were settled before the sentencing, but the civil remedies were not made public.

There are a number of ethical and legal issues in this case. Identify them. Describe the action you might take in a similar situation.

YOU MUST DECIDE

There is no attempt in this book to determine right or wrong for any of the ethical issues in modern medicine. The purpose is to present the law and the facts that are pertinent in the ambulatory health- care setting and to raise some questions for consideration. Most everyone has decided what is right or wrong on the majority of moral issues, but the same distinction in ethics and bioethics is more complex and not so easily identified. This is partly because oflack of accurate knowledge or infor- mation on a particular issue, but accuracy, knowledge, and information are imperative. It is also important to know how and why those opinions have been formed and to look at what is acceptable according to the legal and ethical standards of today. As health professionals, the challenge is to live and act out of respect for oneself and others and to encourage others to do the same. It is important to know what we are to become and how we can become better than we are. Even when our opinions differ from those of the clients we serve, our clients always deserve respect and dignity from us. The hope is that the forthcoming discussions on “Allocation of Scarce Medical Resources,” “Genetic Engineering,” “Reproductive Issues,” “End of Life Issues,” and “Have a Care” will offer a better understanding of what is and what may become.

In reading the following chapters and considering their effect on you personally as well as your role as a health professional, you may find the following lines from a poem by F. A. Russel (1849-1914) helpful.

REMEMBER … Seek the right, perform the true, Raise the work and life anew. Hearts around you sink with care; You can help their load to bear. You can bring inspiring light, Arm their faltering will to fight.

SUMMARY

Knowledge oflaw, ethics, and bioethics is essential for all health-care professionals. The Ethics Check questions offer one approach to address these issues on a personal level. Professional codes of ethics are further guides to performance as a health-care professional. Those who have the professional traits identified in this chapter will be successful health-care employees and will find their profession rewarding and fulfilling. There is no opportunity for boredom in such a fast-paced and rapidly changing field as health care.

Watch It Now! Why study law and ethics? at http:/ j davisplus.fadavis.comjlawandethics

12 Unit I Understanding the Basics

SELECT THE BEST ANSWER

1. Medical law, ethics, and bioethics are necessary to understand a. Health law. b. Differences in moral reasoning among individuals and groups. c. The need to confront biases and bigotry. d. All of the above. e. Only a and b above.

2. Increasingly, hospitals find themselves in the ambulatory care business when a. Individuals are turned away from a clinic setting. b. Certain procedures can only be performed in the hospital. c. Medical technology is not available in a clinic setting. d. Clients prefer the added hours of service the hospital provides. e. Only b and c above.

3. The Hippocratic Oath a. Was written as a result of trials of war criminals. b. Protected the rights of clients and appealed to the finer instincts of the physician. c. Is an update on human experimentation. d. Is very similar to the Nuremberg Code. e. Only a and c above.

4. The most important code of ethics for the ambulatory care professional is the a. AMA Principles of Medical Ethics. b. AAPC Code of Ethics. c. AAMA Code ofEthics andAAMA Creed. d. Personal Ethics Check questions. e. Only c and d above.

5. Making an ethical and/or bioethical decision is based on a. An individual’s religious belief for the most part. b. The direction of the provider-employer. c. State and federal law. d. The cost effectiveness of the particular decision to be made. e. Accuracy, knowledge, and information of the particular issue.

TRUE OR FALSE

T F 1. Ethics is a set of moral standards or a code of behavior.

T F 2. Bioethics relates to societal rules or regulations obligatory to observe.

T F 3. Increased numbers of specialists make it more difficult to coordinate client care.

T F 4. National Healthcare Reform of2010 is likely the most historic domestic policy since Medicare was created in 1965.

T F 5. Blanchard and Peale identified a Patient Bill of Rights.

CLASSROOM EXERCISES

1. State in your own words what medical law, ethics, and bioethics mean to you.

2. What is the difference between law and ethics? Can a law be unethical? Can an ethic be unlawful? Justify your response.

3. What would you do if your personal code of ethics does not agree with that of your employer?

Chapter 1 Medical Law, Ethics, and Bioethics

4. Do the Medical Assistant Code of Ethics and the Principles of Medical Ethics have any con- flicting views? Explain.

5. In a small group discussion, tell how you as a health-care professional can show respect for a client who is rude and disrespectful to you.

6. What will you do if your opinions differ from your clients? For instance, a mother refuses inoculations for her child, and you believe they are necessary.

INTERNET ACTIVITIES

1. Using your favorite Internet search engine, key in the words “world medical ethics codes.” Identify the results.

2. Research the Judicial Council of the AMA on the Internet. What is the Council’s function? List two or three standards identified by this group as ethical/legal guidelines for physicians.

3. Research the 2010 Healthcare Reform Bill to determine whether the Patient Bill of Rights has been implemented, eliminated, or modified. Report your findings and identify any ethical concerns.

4. Research patient bill of rights for clinics for a number of samples. Compare with the hospital patient bill of rights. Identify the similarities and the differences.

REFERENCES

Blanchard, K. , & Peale, N.V.: The Power of Ethical Management. New York: William Morrow, 1988.

Fletcher,]. The Ethics of Genetic Control Ending Reproductive Roulette. Buffalo, NY: Prometheus Books, 1988.

WEB RESOURCES

American Association of Medical Assistants (AAMA) www.aama-ntl.org

American Medical Association (AMA) www.ama-assn.org

All Business: Lawsuit Comes a Day after Physician’s Arrest www.allbusiness.com

Medical Assistant Code of Ethics www.ehow.com/ about_7221549 _code-ethics-medical-assistants.html

State Policies in Brief, Guttmacher Institute: Parental Involvement in Minors’ Abortions www.guttmacher.org

DavisP~ 1 For additional resources please visit http:/ jdavisplus.fadavis.com

Categories
custom dissertation writing dissertation help essay help write my assignment write my dissertation for me

which sector of the midwest economy is the biggest

  1. Which sector of the Midwest economy is the biggest?
    3,216 results
    History
    Why were the 1920s a tale of two nations? That is why did one sector the economy already experience a depression while another part of the economy boom? Be sure to identify which sector boomed and which sector was already in a depression. Why does the

asked by Taylor Beach on July 8, 2014
Social Studies! 4 questions!

  1. Which sector of the Midwest economy is the biggest? A. agriculture B. industry C. services D. transportation ** 2. Where was the world’s first skyscraper located? A. Detroit B. St. Louis C. Minneapolis** D. Chicago 3. Many Midwestern cities began

asked by Beautiful Galaxy Girl on February 9, 2018
Geography (Ms. Sue)
1). Why is the Northeast one of the most heavily industrialized and urbanized areas? 2). How is the economy of the Midwest changing? 3). What helped the economy of the West to grow? My answers to these questions are the following: 1). The Northeast is one

asked by Anonymous on September 12, 2013
Geography
In general, the most materially advanced and developed countries are focused on extensive development of the _ sector of their economy. A. Secondary B. Tertiary C. Primary D. Quaternary I picked A, because the modern materially wealthy countries

asked by Cassie on February 27, 2014
trig
a. A sector that has been cut out of circular plastic sheet which has a circumference of 12.31 m. If the central angle of the sector is 1/4 of a revolution, find the area of the sector.

asked by rahul patel on January 25, 2012

Geo 7th Grade
What would you say is the biggest influence on Mexico’s economy?

asked by rawr… im a dinosaur…. rawr on November 26, 2012
social studies
what are the biggest contributors to ohio’s economy?

asked by jon on December 14, 2009
History
Which of the following region’s populations grew the slowest during the second half of the 1900’s?) The Midwest The Southwest The Southeast The West Coast my answer is the midwest

asked by Steve on May 15, 2017
American History
what are the biggest challenges facing the average American citizen today? I feel that the biggest challenges facing the average American today include lack of jobs, state of our economy, terrorism, and gun violence. Unfortunately in America today wages

asked by Sue on July 26, 2016
Business
What are groups of occupations arranged by sector of the economy? I’m doing a cross-word thing, so it starts with “C”.

asked by Danni on August 23, 2007
Economics
In not less than 3 pages Explain the process of circular flow of income and product in a 3 sector economy

asked by Favour on March 5, 2018
geometry

  1. Infinitely many different sectors can be cut from a circular piece of paper with a 12-cm radius, and any such sector can be fashioned into a paper cone with a 12-cm slant height. (a) Show that the volume of the cone produced by the 180-degree sector is

asked by Sarah on April 15, 2010
Geometry
Infinitely many different sectors can be cut from a circular piece of paper with a 12-cm radius, and any such sector can be fashioned into a paper cone with a 12-cm slant height. (a) Show that the volume of the cone produced by the 180-degree sector is

asked by Sarah on April 17, 2010
math
sector 2 on a spinner is a 90 digrese (sorry for spelling) sector. if the spinner is spun twice, what is the probability that it will stop in sector 2 both times?

asked by kate on March 10, 2017
How do i do this maths question??
A sector of a circle with radius r cm contains an angle of θ radians between the bounding radii. Given that the perimeter of the sector is 7cm, express θ in terms of r and show that the area is r/2(7-2r)cm square. Hence, find the maximum area of this

asked by Danny on June 19, 2009

Grade 7 Geo Questions thx!!
why is the Midwest is sometimes referred to as the breadbasket? What is the importance of the Mississippi River to the Midwest region??? what is the most important-y major-ish region? oh and thx in advance– 🙂

asked by rawr… im a dinosaur…. rawr on November 15, 2012
history
What type of economy eventually led to the soviet union’s collapse? 1) a devolping world economy 2)a non surplus economy 3)a command economy 4)a demand economy i choose 3

asked by Ciara’s Sister on December 16, 2011
trigonometry
A sector AOB of a circle, centre O, radius r cm, where the acute angle AOB is theta radians. Given that the perimeter of the sector is 14 cm and that the area of the sector is 10 cm^2, evaluate r and theta.

asked by lindsay on March 8, 2013
History
How did rearmament impact Germany’s economy and politics? a.It increased production, which led to new jobs, and allowed fascists to rise to power. b.It caused inflation and prompted France and Britain to invade Germany. c.It did not improve the weak

asked by Anonymous on January 25, 2018
Grammar
Indentify each sentence below with Simple, compound, complex, or compound-complex. Could you pleas tell me if these are correct? 1. After they defeated Germany in World War II, the Allies divided Germany and its capital city, Berlin, into four sectors: a

asked by please help me on November 29, 2008
socialstudies(5Qs)
hi guys could you check my social studies answer thanks.oh and if there wrong could you give me the right answer and some information. —————————————- 1.The climate throughout most of the united states is__________. A.tropical

asked by mat on November 4, 2013
Politics
I’m writing a speech, and it’s about the topic “Private sector investment is preferable to public sector investment for Human Space Exploration” I’m on the con side for this argument, and one of my reasons was that public sector will spur cooperation,

asked by Anna on September 18, 2011
Math
A sector of a circle has a radius 5cm The area of the sector is 5π Work out the arc length

asked by Avza on December 7, 2017
math
area of a sector of a circle of radius 36 cm is 54 pie cm square . find the length of the corresponding arc of the sector

asked by shaikha on March 15, 2015
Social Studies
Which type of economic system has the highest level of government control? A. traditional economy B. market economy C. command economy D. mixed economy

asked by FNAF Girl on September 17, 2018

math:mensuration plane shapes
a cone that has a base diameter-8cm and height-3cm is cut into a circle’s sector, what is the angle of the sector

asked by shegster on April 29, 2014
math
A sector in a circle of radius 8.1 m has an area of 53.5 m^2. The central angle in a sector must be _____o. Round to one decimal place.

asked by Emma on May 25, 2013
economy
what is the difference between a savings-surplus sector and a saving-deficit sector?

asked by navid on November 17, 2009
TRIG HELP ASAP
I really need help on this problem. A sector has area of 15 in^2 and central angle of 0.2 radians. Find the radius of the circle and arc length of the sector

asked by missy on February 6, 2012
History
How did economic reforms in Turkey in the late 1900s improve the Turkish economy? A. Turkey made it easier for people to start new businesses and form private companies. B. Turkey invested in government projects, putting money into the economy. C. Turkey

asked by Unkown on December 6, 2018
differential calculus
a bed is in a form of a circular sector. find its radius if the area of the sector is 1000 centimeter square and its perimeter is a minimum

asked by len on July 31, 2013
math
a circular pizza box logo has a sector with a central angle of 80 degrees and a diameter of 16 inches. Find the area of this sector

asked by G on April 23, 2014
Economics
The biggest disadvantage in a command economy is: A. market forces determine production decisions. B. the lack of incentive for individuals. C. there isn’t enough money to go around. D. there’s no government intervention. E. it’s run by a central planner.

asked by Dave on June 5, 2007
Public administration
I have a paper due on the following topic. Any assistance to get me started would be appreciated How do labor relations practiices in the public sector differ from those in the private sector?

asked by Keith on December 20, 2007
english
How do you write “Some of the biggest fish are sharks the very biggest is the whale shark” correctly?

asked by Anonymous on September 18, 2012

English
Help:Please change show me anthing that I need to do, by placing the correct form at the it the bottom of the essay. Topic: What is your biggest regret in life? My Biggest Regret Everyone have had some regrets about something in life. Some of the regrets

asked by Angel on November 10, 2009
trig
In a circle of radius 12 inches, a sector is formed by a central angle of pie/4 radians. Find the area of the sector to the nearest hundredth of a square inch.

asked by Lisa on March 28, 2011
Math
Bayes’ theorem problem, Struggling with this the whole night, please help.Thank you. Two states of nature exist for a particular situation: a good economy and a poor economy. An economic study may be performed to obtain more information about which of

asked by Queenie on July 4, 2016
math
It is projected that t months from now, the average price per unit for gods in a certain sector of the economy will be P(t) = -t3 +7t2 +200t + 300 dollars. c.Use calculus to estimate the change in the rate of price increase during the first half of the 6th

asked by namuun on November 12, 2011
social studies
which of the following is a reason why turkey has lagged behind european nations on the econimic front A. there are no nature resources in turkey B. there were few trade barriers set up in turkey C. agriculture is a large sector of the turkish economy D.

asked by please help on March 6, 2019
HTT/210
HOW DID YOUR SECTOR BECOME MORE POPULAR OR IMPORTANT TO THE TRAVEL AND TOURISM INDUSTRY? PROVIDE A SIGNIFICANT HISTORICAL OR RECENT DEVELOPMENT. WHAT IS THE COMMON DEMOGRAPHIC OR TARGET GROUP THAT UTILIZES YOUR TRANSPORTATION SECTOR WHEN TRAVELING OR

asked by leonor on March 2, 2011
Geography
Which of the following does NOT accurately describe the informal economy? A. The majority of women’s work occurs in the informal economy.* B. In-kind payments are an important aspect of the informal economy. C. Remittances sent by migrant workers

asked by Anonymous on September 15, 2017
Social Studies
Which statement best us explains the population growth in the five cities shown on the graph between 1870 and 1920? A. Many Urban industrial jobs are available in the Midwest and east regions B. Profits from the gold rush encourage the growth of cities on

asked by Gray Bae on April 23, 2018
math
A circular room has radius equal to 40 feet. Marble is to be laid on a sector of the room. What is the area of the sector if the central angle is 45°?

asked by mariyah on March 3, 2011
maths geomentry help!!!
the area of a sector PQR is a @rad.and the radius of the of the circle is rcm,the area of the sector is 20cm^2 and the perimeter is 26cm.find r?

asked by david on March 22, 2016

Geometry
ƒ¡ is a circle with center O . A and B are points on ƒ¡ such that the sector AOB has perimeter 40 . What is the measure of ÚAOB (in radians) when the area of the sector AOB is maximized

asked by Tony on March 11, 2013
geometry
FIND THE LENGTH OF THE RADIUS OF THE CIRCLE IS 9cm. THE ARC OF THE SECTOR MEASURES 60 DEGREES. FIND THE AREA OF THE SECTOR.

asked by YUSUF ALU on August 24, 2011
Mathmatics
A sector of a circle of radius 9 cm subtends angle 120 at center of the circle find the area of the sector to the nearest cm

asked by Eleazar on June 6, 2017
Geometry
The measure of the central angle of a sector of a circle is 90degrees. The arc length of the sector is 3(pie) cm. What is the radius of the circle?

asked by Courtney on April 15, 2012
civics
“Government is taking 40 percent of the GDP (all the goods and services produced in the country in a year). And that’s at the state, local, and federal level … At some point, you cease being a free economy, and you become a government (command)

asked by Nani on June 1, 2015
Geometry
A piece of paper in the form of a sector of a circle of radius 15 cm is rolled into a cone. Calculate the volume of the cone if the angle of the sector is 240 degrees.

asked by Raven on May 7, 2016
Maths
The angle of a sector of a circle with radius 42cm is 120 degree.if the sector is cut out and used to make a cone,what is the curved surface area of the cone?

asked by Bright ulubi on March 21, 2016
Math
A circular sector has an 6.26-inch radius and a 10.84-inch arc length. There is another sector that has the same area and the same perimeter. What are its measurements?

asked by Jane on February 19, 2017
Law
It is __ private-sector correctional providers, especially of prison facilities, are more effective than public-sector providers. A. doubtful that B. untrue that C. unknown at this time whether D. true that is it D

asked by Amy on June 25, 2014
CORRECTIONAL PRACTICE AND POLICY
It is __ private-sector correctional providers, especially of prison facilities, are more effective than public-sector providers. A. doubtful that B. untrue that C. unknown at this time whether D. true that I think it’s B Or A

asked by Sonoko on September 8, 2014

SS
The Midwestern region of the United States is often referred to as the heartland because it is the agricultural center of the nation. What have technological advances such as drilling equipment for wells, machinery, and computers done for the Midwest? The

asked by Anonymous on March 27, 2018
Economics
This problem is based on the specific factors model. Consider the economy of the Shire that produces cereals and swords. Each industry employs Hobbits, but land is specific to the production of cereals, and metal is a specific factor in the sword industry.

asked by Joy on October 3, 2013
Advance Math
If the radius of the right circular cylinder is 4 cm and the height is 16 cm and the measure of the central angle of the shaded sector is 45 degrees, what is the volume of the slice of the cylinder that has the 45 degree sector as it top surface

asked by prt on September 7, 2016
maths
find the angle of a sector of a circle of radius 35cm is 288′ find the perimeter of the sector

asked by ugochukwu on May 16, 2016
math
If the cone in question 22 is made of paper, and the paper is flattened out into the sector of a circle , what is the angle of the sector

asked by hussaina on May 23, 2017
Louisiana History
I really need help I don’t understand this. What type of economy was supported by bartering among Native Americans? a market economy b traditional economy c mercantile economy d command economy 2. Which of the following conditions made most of Louisiana an

asked by Keek on November 10, 2016
maths
please can some one help me..? Part a – O is the centre of the circle, and P , Q are points on the circumference of the circle, with the angle POQ being a right angle. The radius of the circle is 3 cm. Choose the option that is the area of the smaller

asked by kelly on September 11, 2007
stats 4

  1. RBI is analyzing the total credit flow in the economy and the circulation of money in the economy. In order to formulate its annual Monetary & Credit policy, RBI is assessing the credit off take in the banking sector and has classified as low, moderate

asked by prakash on March 29, 2011
mats
Suppose f(x) is a polynomial with integer coefficients of degree 100. Find the biggest possible number of pairs of integers n

asked by Anonymous on June 23, 2013
American History
Based on the information on the map, what can you infer about industry in the United States? 1. Manufacturing was a key part of the economy in the Northeast. 2. Agriculture was the major industry in the South. 3. Mills in the Northeast had to be close to

asked by Anonymous on January 16, 2018

American History
What are the biggest challenges facing the average American citizen today? Jobs, state of the economy, along with terrorism on our soil. Budgets cuts in our Defense has led to inefficient weapons available to the soldiers to fight wars here in America or

asked by Sue on July 21, 2016
geometry
The sector shown is formed into a cone by joining its two radii. Calculate the volume of the cone correct to the nearest whole number. It shows a diagram with a 240 degree sector or two-thirds of a circle with a radius of 12 cm. How do I do this? Thank you

asked by Lucas on May 15, 2012
college
What were the negatives of the new market economy? What were the positives of the new market economy? How did the creation of a single market economy shape American values and the economy of today?

asked by natasha on September 23, 2009
History/115
Q: What were the negatives of the new market economy? What were the positives of the new market economy? How did the creation of a single market economy shape American values and the economy of today?

asked by Johanna on September 2, 2010
HIS 115
What were the negatives of the new market economy? What were the positives of the new market economy? How did the creation of a single market economy shape American values and the economy of today?

asked by natasha on September 23, 2009
problem solving
What is the maximum area of a sector of a circle with P = 100? (Here is another surprise!!! — could you believe it is r2 when r = 25? How is this similar to a square being the maximum rectangle and the central angle of the maximum sector being 2 radians?)

asked by kakak on December 8, 2014
Public Administration
Does Jiskha have Public Administration or Organizational Behavior experts available? Or. is there an expert on public sector OB and public sector finance? Not exactly. The closest is one person has a Masters in Systems Management (UnivSouthernCal).

asked by San on April 6, 2007
American History
Based on the information on the map, what can you infer about industry in the United States? A. Manufacturing was a key part of the economy in the Northeast*** B. Agriculture was the main industry in the south C. Mills in the Northeast had to be close to

asked by Lol on February 21, 2018
math-precalc
In the shot put, the shot must land within a 40 degree sector. Consider a coordinate system where the vertex of the sector is at the origen, one side lies along the positive x-axis, and the units are meters. If a throw lands at the point with coordinates

asked by Haley on January 29, 2011
Writing
write an annotated bibliography on Franco, L. M., Bennett, S., & Kanfer, R. (2002). Health sector reform and public sector health worker motivation: a conceptual framework. Social Science & Medicine,54(8), 1255-1266

asked by Keyal on November 9, 2017

maths
a paper cone has a base diameter of 8cm a height of 3cm. a)caculate the volume of the cone in terms of pie b)if the cone is cut and opened out into the sector of a circle.what is the angle of the sector

asked by ulubi on June 15, 2016
economics
Briefly describe the main attributes of the following economic systems: market economy, centrally planned economy, and mixed economy.

asked by Anita fields on November 29, 2010
economics
Briefly describe the main attributes of the following economic systems: market economy, centrally planned economy, and mixed economy.

asked by Anita fields on November 29, 2010
Cranborne
In the diagram AOBP is the major sector of a circle centre O.BO=8cm, AOB=156° and the sector is bent to form a right cone. a)Caculate the radius of the cone b)Calculate the vertical angle of the cone

asked by Kudakwashe on October 14, 2015
Hospitality and Tourism
Match the definition with the word(s) Food and Beverage. Food and Beverage Sector, Hospitality, Lodging, Lodging Sector, Logistics, Recreation, Tourism, Travel and (tourism) Also known as accomodation Lodging Business of moving people from place to place

asked by Anonymous on August 27, 2016
social studies
Name the 5 regions that the U.S. is divided into. There are many ways to do this dividing. One would be: far west (including rocky mt. states) midwest (including Texas) south midatlantic New England Another, more based upon topography, would be: Pacific

asked by Courtney on January 2, 2007
geometry!
Γ is a circle with center O. A and B are points on Γ such that the sector AOB has a perimeter of 40. Amongst all circular sectors with a perimeter of 40, what is the central measure of ∠AOB (in radians) of the sector with the largest area?

asked by PLEASE…HELP..ANYONE on March 13, 2013
Math
A paper cone has a base diameter of 8cm and a height of 3cm(a) use Pythagoras theorem to calculate it’s slant height (b)if the cone is cut and opened out into the sector of a circle what is the angel of the sector

asked by Joy on May 30, 2016
us history
after the war of 1812, What were the negative aspects of the new market economy? What were the positive aspects of the new market economy? How did the creation of a single market economy shape American values and the economy of today?

asked by karen on July 17, 2010
geography
What type of economy does each statement describe? Select C for Command economy. Select M for Market economy. Select T for Traditional economy.

asked by Anonymous on March 13, 2017

Math
The difference between the smallest and second smallest angles of a quadrilateral is equal to the difference between the biggest and second biggest angles. If the biggest angle is twice the smallest angle, what is the measure of the smallest angle?

asked by MNHS_HELP on January 26, 2015
geometry
What is the ratio of the area of sector AOB to the area of sector COD? 1/3,1/4,1/9,3/8

asked by jo on March 25, 2016
math
Dana takes a sheet of paper, cuts a 120-degree circular sector from it, then rolls it up and tapes the straight edges together to form a cone. Given that the sector radius is 12 cm, find the height and volume of this paper cone.

asked by hodna on April 11, 2010
econ
1).The unemployment rate inan economy is 8%. The total population of the economy is 250, and the size of te civilian labor force is 150. The number of employed workers in this economy is _20. (IS THIS CORRECT)

asked by Anonymous on July 27, 2009
Algebra 2
If the arc length of a sector in the unit circle is 3π/2 what is the measure of the angle of the sector? 0 radians π/2 radians

asked by Kels on May 16, 2017
social studies
What were the negative aspects of the new market economy? What were the positive aspects of the new market economy? How did the creation of a single market economy shape American values and the economy of today?

asked by karen on July 16, 2010
macroecon – MC
hi guys just having a few torubles with this topic – “THE INCOME EXPENDITURE MODEL AND THE GOODS MARKET”. 1)1. Brilliant economist Sean Wylie Blair, Governor of the Central Bank of the island nation of Chou Gai, decides to build a two sector model of the

asked by milad on March 18, 2007
calculus
A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?

asked by lisa on April 25, 2013
calculus
A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?

asked by lisa on April 23, 2013
calculus
A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?

asked by lisa on April 25, 2013

oc
1 what the importance of public sector ? 2 what is the private sector importance ? 3 conclusion the public sector ? 4 conclusion the private sector ?

asked by manisha on December 19, 2015
Statistics
Option Seminar 2 5.19) According to data from the U.S. Energy information Administration, the 60.0 million U.S. households with personal computers were distributed as shown here with regard to geographic location and access to the Internet. The entries

asked by Lesliam on July 20, 2009
SS
The map shows the areas of New York with more dots than the places by the Ohio River. Based on the information from the map what can you infer about industry in the united states? A- Manufacturing was a key part of the economy in the northeast. B-

asked by Star Lord on January 11, 2018
Econometrics
If the price of 1 pound of cereals is $10 and the price of a sword is $100, what is the wage rate paid to Hobbits in the Shire? How many Hobbits work in the cereal sector? In sword sector?

asked by Joy on October 4, 2013
Maths
A sector of a circle of radius 8cm is bent to form a cone. Find the radius of the cone and it’s vertical angle if the angle substended at the centre by the sector is 280°

asked by Amarachi on June 10, 2018

Categories
cheap dissertation writing services phd dissertation writing services write my assignment write my dissertation for me

which statement best describes the relationship between science and technology

  1. Which statement best describes the relationship between science and technology?

A. The goal of science is to gain an understanding of the natural world, while the goal of technology is to use that understanding to improve people’s lives.<<
B. The goal of science is to create solutions that improve people’s lives by mimicking the natural world, while the goal of technology is to build machines.
C. The goal of science is to use technology, while the goal of technology is use science.
D. The study of science does not rely on technology, while technology could not exist without science.

  1. In the 1900s, many farmers replaced their horse-drawn plows with tractors. Which of the following describes a cost of this new technology?
    A. Farmers needed a lot more horses and had to pay more in horse feed.

B. Farmers could grow more crops because they could plow more land with the tractor than with a horse-drawn plow.<<
C. Farmers with tractors needed fewer workers, so many people lost their jobs.
D. Tractors increased the amount of work a farmer could do in the same amount of time.

  1. Which factor is most helpful in helping technology to progress?
    A. Unintended consequences

B. A better understanding of the natural world.
C. Risk-Benefit Analysis
D. Obsolete technologies

  1. An oven is a technological system. Which of the following describes an input into the system?

A. Setting the temperature.<<
B. Burning gas releases heat.
C. A thermostat monitors the temperature and increases the gas flow when the temperature falls to low.
D. A cake is baked.

  1. Which of the following describes feedback in an oven?
    A. Setting the temperature.

B. Burning gas releases heat.<<
C. A thermostat monitors the temperature and increases the gas flow when the temperature falls to low.
D. A cake is baked.

0 0 627
asked by Ahxello
Sep 12, 2017
Agree 1-4, but disagree with 5. See definition of feedback.

0 0
posted by PsyDAG
Sep 12, 2017
A.
C.
B.
A.
C.

0 0
posted by Cupcake
Sep 18, 2017
Cupcake is 100 percent right just so u dont get it wrong 5/5

0 0
posted by get him ftw 23
Sep 19, 2017
thanks cupcake his answers are right i got a 5/5 bye 🙂

0 0
posted by lamonsta
Sep 19, 2017

i think the the answers are a c b a c

0 0
posted by damonster
Sep 19, 2017
Ms. Cupcake, is right. 100% 5/5

0 0
posted by Evaluate girl
Sep 26, 2017
thxs cupcake:)

0 0
posted by Angelina
Oct 4, 2017
100% goes to cupcake 5/5 yay thx cupcake

0 0
posted by Jojo
Nov 6, 2017
thank you cupcake 100%

0 0
posted by someone
Aug 27, 2018

Thanks all of you for your help!

0 0
posted by Tundradragon
Aug 27, 2018
Cupcake is right. In 2018

0 0
posted by Dog eats spaghetti
Aug 29, 2018
CUPCAKE IS 10000000% CORRECT, DO NOT LISTEN TO miss.Jack! She/he is trying to get you to pick the wrong answers!!

0 0
posted by cAt.ExE HaS sTopPeD wORkInG
Aug 30, 2018
Thanks Cupcake!

0 0
posted by huskiesrule1
Sep 4, 2018

  1. A
  2. C
  3. B
  4. A
  5. C 0 0
    posted by Hal
    Sep 11, 2018

thanks cupcake
100% 5/5

0 0
posted by oof
Sep 19, 2018
Cupcake is correct thanks !!!!

0 0
posted by SinatraSchool
Sep 19, 2018
thanks cupcake i got 5/5 (100%)

0 0
posted by adam box
Sep 19, 2018
u guys r the best i love this site

0 0
posted by the guy that has a random name
Sep 19, 2018
Thx Cupcake

0 0
posted by Jordan
Sep 25, 2018

cupcake is 100% correct

0 0
posted by dipstick
Sep 25, 2018
TYSM Cupcake!!

0 0
posted by <3 Vaeh <3
Sep 26, 2018
THANKS CUPCAKE YOU IS SOOOOOOOOOO RIGHT

0 0
posted by J
Sep 27, 2018

Categories
buy coursework essay writing services what should i write my college essay about write my assignment write my dissertation for me

how many formula units are in the unit cell shown for li2s?

The crystal structure of lithium sulfide (Li2S) is pictured here. (Intro 1 figure) The edge length of the unit cell is 5.88*10^2^2 pm.

i guess it is FCC ( face cenred cubic)

1–

What are the coordination numbers of and Li^+ and S^2- in the lithium sulfide crystal shown? Enter the values in order of Li^+ and S^2-, respectively.

Ans… i though it shld be 4,4 .. but it says ” Face ions are shared between two unit cells.”…

plz someone

2- How many formula units are in the unit cell shown for Li2S ?

Ans- i gues it shld be 1 but it says –
The formula represents one formula unit. How many sets of are in the unit cell?

0 0 791
asked by Dr Bob plz help
Jan 24, 2009
I don’t have the book and can’t see the picture. I can’t find anything on the Internet so I’m passing on this one. I’ve also looked in all the references I have at home and can’t find anything on Li2S.

0 0
posted by DrBob222
Jan 24, 2009
The Number of Formula Units is 4, but I don’t know why, I just happened to guess it and it marked it as correct for me.
As for part 1, I don’t know 🙁

0 0
posted by Mrs C
Jan 25, 2009
It’s 4,8. Easy, you just count the lines, but note that the S(2-) is on the surface, so it’s surrounded by the Li+ of the adjacent unit cell as well as its own.

0 0
posted by Dash
Jan 26, 2009
What is the density of Li2S in grams per cubic centimeter? this was the 3rd part of this question :/

0 0
posted by Anonymous
Jan 27, 2009

The density of lithium sulfide is 1.5g/cm^3

0 0
posted by friend
Jan 27, 2009
the number of formula units is 4: there are 4 Sulfur atoms in the unit cell (8* 1/8 + 6* 1/2) and 8 Lithium atoms (all contained within the unit cell)

0 0
posted by SJ
Jan 27, 2012

Categories
buy coursework do my assignment essay writing services what should i write my college essay about write my dissertation for me

what was the speed vai of puck a before the collision?

On a frictionless horizontal air table, puck A (with mass 0.255 kg ) is moving toward puck B (with mass 0.365 kg ), which is initially at rest. After the collision, puck A has velocity 0.118 m/s to the left, and puck B has velocity 0.649 m/s to the right.
What was the speed vAi of puck A before the collision?

0 0 179
asked by Amanda
Dec 3, 2015
This is the same as the one with the skaters, just different numbers
momentum before = .255 v + .365 * 0
momentum after = .255 (-.118) + .365*.649

momentum after = momentum before, solve for v

0 0
posted by Damon
Dec 3, 2015

Categories
dissertation help dissertation writing services do my assignment write my dissertation for me

an aphorism is a cleverly worded statement that is meant

The majority of Robert Frost’s poems concern life in the city.

true
false

i think its true

0 1 307
asked by Lexi
Jan 27, 2012
http://www.internal.org/Robert_Frost

0 0
👩‍🏫
Ms. Sue
Jan 27, 2012
I do not think so. I just checked out a book of his poems from the library and it seems more of a quiet, country theme. I am not sure but i think so

1 0
posted by me/4/me
Jan 27, 2012

  1. An aphorism is a cleverly worded statement that is meant to trick the listener into believing a lie. (1 point)
    (0 pts) true
    (1 pt) false
    1 /1 point
  2. It is the neighbor who believes that good fences make good neighbors, not the speaker. (1 point)
    (1 pt) true
    (0 pts) false
    1 /1 point
  3. The underlined portion of the sentence below is an example of a subordinate clause.
    Many people use bamboo screens that roll up and down.
    (1 point)
    (0 pts) true
    (1 pt) false
    1 /1 point
  4. The majority of Robert Frost’s poems concern life in the city. (1 point)
    (0 pts) true
    (1 pt) false
    1 /1 point

The final score is 4/4 (100%).

1 0
posted by Urwelcome
Feb 7, 2012

Categories
essay writing services paper help pay for essay write my dissertation for me

what is the heat of combustion of ethane, c2h6, in kilojoules per mole of ethane?

(Another) Physics Homework Help? The two blocks in the figure are sliding down the incline. What is the tension in the massless string?
20,214 results
physics
(Another) Physics Homework Help? The two blocks in the figure are sliding down the incline. What is the tension in the massless string?

asked by vidya on October 24, 2008
Physics
I am doing my physics homework and am stuck on this one problem. can anyone help me please? Two blocks are connected by a massless string and are held in position by another massless string along a frictionless incline (as shown in the figure). Let M1 =

asked by Kaity on January 30, 2012
physics
Find the acceleration of the two blocks sliding down the incline in the figure below. (Take m1 = 1.1 kg and m2 = 1.8 kg. Indicate the direction with the sign of your answer

asked by joy on February 23, 2018
Ff
The coefficient of static friction between the m = 3.50 kg crate and the 35.0° incline of Figure P4.41 is 0.340. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline? Your response

asked by Avery on March 1, 2012
physics
A block slides down a 10 angled incline at a constant speed. what is the coefficient of sliding friction between the blocks surface and the incline?

asked by kim on November 8, 2008

physics
Find the acceleration of the two blocks sliding down the incline in the figure below. (Take m1 = 1.1 kg and m2 = 1.8 kg. Indicate the direction with the sign of your answer Link to figure, copy and paste part by part Part1: //d2vlcm61l7u1fs.cloudfront.

asked by joy on February 27, 2018
RE: Physics
If an incline has a difference in height from one end to the other of 17.8 cm and has a length along the incline of 1.19 m, what is the angle that the incline makes with the horizontal reference surface? Physics – Damon, Saturday, February 15, 2014 at

asked by Christina on February 15, 2014
Physics
A 59.1 N/m spring is unstretched next to the 90 degree angle of an incline, and the system is released from rest. The mass of the block on the incline is m1 = 21.4 kg. (Neglect the mass of the pulley). If the coefficient of kinetic friction between m1 (the

asked by Jack Johnson on October 22, 2012
Physics
A box is sliding down an incline tilted at an angle of 2.14° above horizontal. The box is sliding down the incline at a speed of 5.15 m/s. The coefficient of kinetic friction between the box and the incline is 0.387. How far does the box slide down the

asked by Jen on June 25, 2015
Physics
A crate begins sliding down a frictionless incline of 25.0o. If the objects begins sliding from rest and takes 1.50 sec to slide down the incline, what is the speed of the crate as it leaves the incline? How long is the incline?

asked by Tyler on April 15, 2014
Physics
The coefficient of static friction between the m = 3.75-kg crate and the 35.0° incline of the figure below is 0.320. What minimum force vector F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by Ryan on March 10, 2015
Physics
The coefficient of static friction between the m = 3.20-kg crate and the 35.0° incline of the figure below is 0.260. What minimum force vector F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by James on March 4, 2014
Physics
The coefficient of static friction between the 2.90 kg crate and the 35.0° incline of Figure P4.41 is 0.260. What minimum force F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by David on October 7, 2013
physics
The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by Anonymous on October 5, 2012
physic
The coefficient of static friction between the m = 3.20 kg crate and the 35.0° incline of the figure below is 0.340. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by Chan on October 16, 2009

physics newtons laws 3
The coefficient of static friction between the m = 3.20 kg crate and the 35.0° incline of Figure P4.41 is 0.260. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by luc on October 18, 2009
physics
The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by Anonymous on October 5, 2012
Physics
www.webassign.net/sercp9/4-p-047-alt.gifThe coefficient of static friction between the m = 3.60−kg crate and the 35.0° incline of the figure below is 0.330. What minimum force F must be applied to the crate perpendicular to the incline to prevent the

asked by Cameron on October 3, 2018
Physics
Two blocks of masses m1 = 4.4 kg and m2 = 4.8 kg are connected by a string as shown in the figure above. Block 1 moves at a constant velocity down the incline 30 degrees) block two is not at incline it is straight. they are attached with a string. a) Find

asked by Micheal on July 13, 2014
Physics
Two blocks of masses m1 = 4.4 kg and m2 = 4.8 kg are connected by a string as shown in the figure above. Block 1 moves at a constant velocity down the incline 30 degrees) block two is not at incline it is straight. they are attached with a string. a) Find

asked by Micheal on July 13, 2014
physics
home / study / science / physics / questions and answers / a block of mass 3kg s sliding along the frictionless … Question A block of mass 3kg s sliding along the frictionless horizontal surface with a speed of 2m/s. 1. What is the kinetic energy of the

asked by anna on April 27, 2016
physics
In the figure, two blocks are connected over a pulley. The mass of block A is 7.9 kg and the coefficient of kinetic friction between A and the incline is 0.18. Angle θ of the incline is 41°. Block A slides down the incline at constant speed. What is the

asked by krals on March 17, 2016
Physics
Two blocks are tied together with a string as shown in the diagram.(There is a block on a horizontal incline, its mass is 1.0kg, there is a rope connecting that block to a pulley which then connects to another block that is 2.0kg. The angle of the incline

asked by Mercedes on October 22, 2010
physics
A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a)

asked by Angel on February 29, 2012
physics
A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a)

asked by Angel on February 28, 2012

physics please help :/
A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a)

asked by Angel on March 1, 2012
Physics
The spring shown in the figure is compressed 59cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student’s coefficient of kinetic friction on the 30∘ incline is 0.14 . k= 80,000 N/m m=100 kg uk=

asked by Dib on November 8, 2014
physics
A crate weighs 820N and rests on a 34degree incline. You can keep it from sliding down the incline by pushing on it with a force of 240N applied parallel to the incline. 1)Calculate the coefficient of static friction between the crate and the incline.

asked by Anonymous on September 26, 2010
Physics
In the figure below, two blocks are connected over a pulley. The mass of block A is 12 kg, and the coefficient of kinetic friction between A and the incline is 0.22. Angle θ is 30°. Block A slides down the incline at constant speed. What is the mass of

asked by Ben on February 21, 2011
bowie
A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.

asked by trish on December 16, 2015
Physics
A box is sliding up an incline that makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30 m/s.

asked by Peter on October 21, 2011
Physics!
HELP!!! A box rest on an incline making a 34 angle with the horizontal. It is found that a parallel force to the incline of at least 240 N can prevent the box from sliding down the incline. If the weight of the box is 800 N, find the coefficient of static

asked by Randy on October 7, 2017
physics
A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.

asked by trish on December 16, 2015
PHYSICS
A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.

asked by James on December 16, 2015
Physics
A box is sliding up an incline that makes an angle of 13.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.80 m/s.

asked by Anonymous on October 29, 2012

Physics
A box is sliding up an incline that makes an angle of 17.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.40 m/s.

asked by NHS on September 17, 2007
physics
A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.

asked by trish on December 16, 2015
physics
blocks 1 and 2 of masses 2 kg and 4kg, respectively, are connected by a light string, as shown above. These blocks are further connected to a block of mass 3kg by another light string that passes overr a pully of negligible mass and friction. Blocks 1 and

asked by b on November 13, 2012
11th grade
A box is sliding up an incline that makes an angle of 16.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30m/s.

asked by shan lalani on September 20, 2010
Physics
Consider a version of the atwood machine in which the masses are frictionless incline. The mass sliding on incline 1, m1, is 1.5 kg, and the angle of this incline is 62 deg. If the mass on the second incline, m2, is 2.5 kg, what is the angle 2 so that the

asked by rachel on December 28, 2010
physics
hello! I have been having a lot of trouble with one physics problem that I have for homework: any help would be greatly appreciated! ‘A block of mass 12 kg starts from rest and slides a distance of 8 m down an inclined plane making an angle of 40 with the

asked by Ty on November 25, 2007
Physics
A box is sliding up an incline that makes an angle of 15.0 degrees with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box and the surface of the incline is

asked by Matoro on December 8, 2012
bobpursley
ok im doing my physics homework and we have to submit the answers online. i keep getting these questions wrong and i only have one more try can someone please tell me how to work it? a 2.5 kg otter starts from rest at the top of a muddy incline 94.6 cm

asked by Claudia on October 15, 2008
physics
Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in the figure. In terms of m and θ, find the following.

asked by kay on September 28, 2013
Physics
Two blocks M1 and M2 are connected by a massless string that passes over a massless pulley as shown in the figure. M1 has a mass of 8.25 kg and rests on an incline of 73.5°. M2 rests on an incline of 15.5°. Find the mass of block M2 so that the system is

asked by meg on October 14, 2015

science
In the figure, blocks A and B have weights of 49 N and 32 N, respectively. Determine the minimum weight of block C to keep A from sliding, if the coefficient of static friction between A and the table is 0.20.

asked by xxxxxxx on January 6, 2016
Physics(Please help)
1) A box is sliding up an incline that makes an angle of 14.0 ° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.176. The initial speed of the box at the bottom of the incline is 3.72

asked by Hannah on May 29, 2012
physics… last one
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.63. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.23.

asked by clueless on November 10, 2010
physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.24.

asked by Chan on October 26, 2009
physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is μk = 0.28.

asked by tom on March 15, 2012
physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.25.

asked by megan on March 3, 2011
Math, Physics
Two blocks with indicated masses are connected by a cable of negligible mass over a pulley with radius 45cm. The block on the incline is sliding without friction and experiences a constant acceleration of 2 m/sec^2. Determine the mass of the pulley

asked by Sterling on June 23, 2013
Physics Urgent!
Please help! This is due in three hours and I don’t know how to do these! 1.A block accelerates at 3.1 m/s2 down a plane inclined at an angle 24.0◦. Find μk between the block and the inclined plane. The acceleration of gravity is 9.81 m/s2 . 2.Two

asked by Mikayla on November 3, 2016
physics
The coefficient of static friction between the 3.0 kg crate and the 31° incline shown below is 0.300. What is the magnitude of the minimum force, F, that must be applied to the crate perpendicularly to the incline to prevent the crate from sliding down

asked by sammy on October 23, 2011
Physics
The coefficient of static friction between the 3.00 -kg crate and the 35 degree incline is .300. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline.

asked by Jas on September 26, 2011

science
The coefficient of static friction between 3.00 kg crate and the 35.0 incline is 0.300.what minimum force F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline

asked by kathy on September 13, 2017
Physics
The coefficient of static friction between the m = 2.95-kg crate and the 35.0° incline is 0.345. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

asked by Lala on October 26, 2011
Physics
The coefficient of static friction between the 3.78 kg crate and the 38° incline is 0.306. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline? The acceleration of gravity is 9.8

asked by Elizabeth on October 3, 2010
physics
ok im doing my physics homework and we have to submit the answers online. i keep getting these questions wrong and i only have one more try can someone please tell me how to work it? a 2.5 kg otter starts from rest at the top of a muddy incline 94.6 cm

asked by Claudia on October 15, 2008
Physics
Two blocks with masses M1=8.50kg and M2=1.40kg are attached by a thin string which goes over a frictionless, massless pulley. M1 slides on an incline and there is friction between M1 and the incline. The incline is at an angle of 23.0 degrees from

asked by Sam Cole on June 18, 2013
Physics
A physics student stands on the edge of a cliff 2x meters. He throws his physics homework straight up in the air. Derive an expression to calculate the time taken by the homework to come back to the student.

asked by Tyler on September 30, 2017
physics help
I know that the answer to this problem is (0.2237232293) and to begin it by making a force body diagram, but I need help setting up the equation(s). Thanks! A box rest on an incline making a 30 angle with the horizontal. It is found that a parallel force

asked by jessica on October 3, 2014
physics
Two blocks each with weight w are held in place on a frictionless incline. In terms of w ans the angle theda of the incline, calculate the tension in a) the rope connecting the blocks; b) the rope that connects block A to the wall? a) it was wsin(theda) b)

asked by Chris on November 16, 2006
physics
A person who weighs 80kg sliding down a 30 degree incline with a coefficient of friction of .20 A person who weighs 80 kg sliding down a 20 degree incline with a coefficient of friction of .20 A person who weighs 40 kg sliding down a 20 degree incline with

asked by G on July 7, 2015
physics
Two blocks are tied together with a string as shown in the diagram.(There is a block on a horizontal incline, its mass is 1.0kg, there is a rope connecting that block to a pulley which then connects to another block that is 2.0kg. The angle of the incline

asked by mercedes on October 22, 2010

Physics
A 1.5kg block starts to slide up a 25 degrees incline with an initial speed of 3m/s.It stopes after sliding 0.4m and slides back down.Assuming the friction force impeding its motion to be constant. 1).How large is the friction force? 2)What is the blocks

asked by Pierre on February 10, 2019
Physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless

asked by Sam on October 6, 2011
Physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless

asked by Sam on October 6, 2011
physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless

asked by Sam on October 6, 2011
physics
Two blocks (one of which is on a ramp) are attached via a string looped over a pulley. The block on the incline has a mass of 5.0 kg; the block hanging downward (suspended by the pulley) has a mass of 7.0 kg. Assume the usual things (non-stretchy massless

asked by Sam on October 6, 2011
Physics-Mechaincs
A force of 23.52 N pushes and pulls to blocks as shown in the figure below. The vertical contact surfaces between the two blocks are frictionless. The contact between the blocks and the horizontal surface has a coefficient of friction of 0.29. The

asked by Genevieve on September 24, 2010
physicsssss
two blocks are connected over a pulley. The mass of block A is 10 kg and the coefficient of kinetic friction between A and the incline is 0.24. Angle èof the incline is 30°. Block A slides down the incline at constant speed. What is the mass of block B?

asked by ashley on October 3, 2010
Physics
Two blocks are connected by a string, The smooth inclined surface makes an angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.7kg. The mass of the hanging block is m=3.2kg. Find the direction and magnitude of the hanging

asked by Priscilla on March 13, 2012
physics
Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is μk = 0.27

asked by Diego on November 30, 2012
physics
Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is μk = 0.27

asked by Diane on November 30, 2012

AP Physics
Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is μk = 0.27

asked by Ashley on November 29, 2016
physics
Two blocks connected by a cord passing over a small, frictionless pulley rest on frictionless planes: a) What is the acceleration of the blocks? b) What is the tension in the cord? c) Which way will the system move when the blocks are released from rest?

asked by ATT on March 16, 2018
Re: PHYSICS
“Relative” is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring

asked by COFFEE on February 27, 2007
physics
A small block with mass 0.308 kg is sliding down a frictionless ramp that is inclined at an angle of 53.1° above the horizontal. Assume g = 9.80 m/s2. (a) As the object slides down the incline, what is the magnitude of the normal force that the surface of

asked by Mike on February 2, 2015
Physics
Q. A mass is sliding down an incline. As the angle for the incline increases, the magnitude of the component of weight perpendicular to incline:- Increases Decreases Increase then decrease Decrease then increase

asked by SAGAR on July 4, 2016
Physics
Two blocks are connected over a massless, frictionless pulley. The mass of block 2 is 8.00 kg, and the coefficient of kinetic friction between block 2 and the incline is 0.250. The angle θ of the incline is 28.0°. Block 2 slides down the incline at

asked by Aron on September 30, 2016
Physics
Two blocks are attached by a thin inextensi- ble string over a frictionless, massless pulley. There is a frictional force between the block on the incline and the incline. The acceleration of gravity is 9.8 m/s2 . 13 kg 13 kg μ T 1.1 m/s 0 m/s2 39◦

asked by Letisha on November 12, 2009
physics
A string going over a massless frictionless pulley connects two blocks of masses 4.4 kg and 11 kg. As shown on the picture below, the 4.4 kg block lies on a 23◦ incline; the coefficient of kinetic friction between the block and the incline is μ = 0.29.

asked by Sarah on March 6, 2014
Physics
Block A, with a mass of 10 kg, rests on a 36.9° incline. It is attached to a string that is parallel to the incline and passes over a massless, frictionless pulley at the top. Block B, also with a mass of 10 kg, is attached to the dangling end of the

asked by ANON on November 27, 2016
Physics
The block pictured below is sliding upward on the incline with theta=25. the coefficient of friction between the block and the incline is 0.15. of the block has a speed of 5 m/s at the bottom of the incline, how far upward will it slide before it stops?

asked by Alex Baker on October 30, 2012

Physics
Any help pleeeze!! I’m totally lost on these!! 1. A 14 g coin slides upward on a surface that is inclined at an angle of 16° above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static

asked by L.A. on May 20, 2007
general physics
A string going over a massless frictionless pulley connects two blocks of masses 5.9 kg and 9.5 kg. the 5.9 kg block lies on a 31 ◦ incline; the coefficient of kinetic friction between the block and the incline is µ = 0.22. The 9.5 kg block is hanging

asked by David on February 20, 2016
Physics
The coefficient of static friction between the 3.00 kg crate and the 35.0 degree incline is .300. What minimum force must be applied to the crate from sliding down the incline?

asked by Dee on September 28, 2011
sciencce
a block slides down an angle 10 incline at a constant speed. what is the coefficient of sliding friction between the block’s surface and the incline?

asked by kim on November 8, 2008
Physics
In the configuration shown (10m incline for m1 and 8m vertical length for m2 with a spring under it, both masses are linked by a rope and a pulley at the top), the 52.0 N/m spring is unstretched, and the system is released from rest. The mass of the block

asked by Alphonse on October 25, 2012
Physics
In the configuration shown (10m incline for m1 and 8m vertical length for m2 with a spring under it, both masses are linked by a rope and a pulley at the top), the 52.0 N/m spring is unstretched, and the system is released from rest. The mass of the block

asked by Alphonse on October 25, 2012
physics
Problem A5: In the figure above, the two blocks are on frictionless inclines and are in static equilibrium. The block on the left has a mass of 48 Kg, and the block on the right has a mass of n3 Kg. If the left incline has a length of n1 meters, and the

asked by frank on January 10, 2012
What is the heat of combustion of ethane, C2H6, in kilojoules per mole of ethane?
11,889 results
chemistry
What is the heat of combustion of ethane, C2H6, in kilojoules per mole of ethane?

asked by superman on January 27, 2013
Chemistry
What is the heat of combustion of ethane, C2H6, in kilojoules per mole of ethane?

asked by Jessica on June 19, 2013
Chemistry
Ethane, C2H6, has a molar heat of vaporization of 15kJ/mole. How many kilojoules or energy are required to vaporize 5 g of ethane?

asked by Ambra on May 1, 2012
chemistry

  1. the volume of an idea gas is 2.06L at standard temperature and pressure. Calculate the volume at 1.75 atm and 27CELCIUS. 2. Ethane, C2h6 has a molar heat of vaporization of 15kj/mole. How many kilojoules or energy are required to vaporize 5 g of ethane?

asked by stephanie on December 1, 2009
Chemistry
Ethane, C2H6 has a molar heat of vaporization of 15 kj/moles. How many kilojoules of energy are required to vaporize 5 grams of Ethane?

asked by Persia on July 21, 2008

Chemistry
Enthalpy I’m given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 –> 4 CO2 + 6 H2O Okay so I’m rough on Thermo right now, so I gave it my best shot.

asked by Justin on November 8, 2015
Chemistry
Enthalpy I’m given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 –> 4 CO2 + 6 H2O Okay so I’m rough on Thermo right now, so I gave it my best shot.

asked by Justin on November 8, 2015
Chemistry
Enthalpy I’m given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 –> 4 CO2 + 6 H2O Okay so I’m rough on Thermo right now, so I gave it my best shot.

asked by Justin on November 8, 2015
chemistry
ethane,C2H6 burns in oxygen. A. what are the products of the reaction? B. write the balanced equation for the reaction. C. what mass of O2, in grams is required for complete combustion of 13.6 of ethane? D. what is the total mass of products expected from

asked by adriane on October 7, 2013
Chemistry
For the complete combustion of 1.000 mole of ethane gas at 298K and 1 atm pressure, change in H= -1560 kJ/mol. What will be the heat released when 4.42g of ethane is combusted under these conditions?

asked by Kristi on October 25, 2014
chemistry
During the combustion of ethane, C2H6(g), 40.4 grams of liquid are collected . How many liters of ethane, measured at 3.55 atm and 33 C, were burned?

asked by Devin B on August 31, 2011
Chemistry
The combustion of ethane: 2 C2H6 (g) + 7 O2 (g) —> 4 CO2 (g) + 6 H2O (g) At the same temperature and pressure, what is the maximum volume in liters of carbon dioxide that can be obtained from 15.9 L of ethane and 52.3 L of oxygen?

asked by Helpless on November 6, 2012
Chemistry
Please show me how to work! Ethane, C2H6(g) can be made by reaction of hydrogen gas with acetylene, C2H2(g). the standard enthalpies of formation of ethane and acetylene are -84.68 and +226.73 kJ mol-1, respectively. what is the reaction enthalpy for the

asked by Sam on October 20, 2012
Chemistry
If the molar enthalpy of combustion of ethane is -1.56 MJ/mol, how much heat is produced in the burning of; a) 5.0 mol of ethane b) 45 g of ethane

asked by HAte Chemistry 🙁 on November 9, 2017
Chemistry
Calculate the weight of ethane, C2H6 (MWT = 30g/mole), required to produce a pressure of 1520 mm at 20 degrees C when contained in a 9.00 liter vessel. How many moles of ethane is it?

asked by Darryl on December 14, 2010

Chemistry
The combustion of ethane (C2H6) produces carbon dioxide and steam: 2C2H6+702 yields 4CO2 +6H2O How many moles of CO2 are produced when 5.30 mol of ethane are burned in an excess of oxygen?

asked by Mary on September 22, 2013
Science
The amount of heat released when 2.8g of ethane is completely burnt in excess of oxygen is 200kj what will be the heat of combustion of ethane? Answer plz…

asked by Anonymous on June 21, 2018
Chemistry
Guys. I have another chemistry question that I am unsure with. I would appreciate it if you could help me with working out. Thanks. A sample of ethane, C2H6, contains 9.6 * 10 ^ 22 atoms. How many mole of ethane is present in the sample? Why do I need to

asked by Mole help! on June 17, 2015
chemistry
a.) Write the balanced complete combustion reaction for ethane (C2H6), producing CO2 and water vapour. Make sure to include phases. Also, make sure that the stoichiometric coefficients are whole numbers and are not fractions. b.) What is the enthalpy of

asked by BILLY on October 3, 2014
Chemistry
use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. on the chart is said ethane(C2H6) is -84.0. In

asked by Alexis on April 28, 2014
Chemistry
If 10.5 g of hydrogen,H2, were mixed with 6.51 g of acetylene, C2H2, and allowed to react according to the following equation, what is the theoretical yield of ethane, C2H6, produced? If 7.00 g of ethane, C2H6, were recovered at the end of the reaction,

asked by C.M. on April 28, 2013
Chemistry
If 10.5 g of hydrogen, H2, were mixed with 6.51 g of acetylene, C2H2, and allowed to react according to the following equation, what is the theoretical yield of ethane,C2H6 produced? If 7.00g of ethane, C2H6 were recovered at the end of the reaction , what

asked by Anonymous on April 24, 2013
chem 30
When 7.5 g of ethane was completely burned, all the heat produced was used to heat 1.50 kg of water. If the temperature of water rose from 20EC to 80EC, the heat of combustion of ethane is

asked by elaine on January 24, 2016
Chemistry
Ethane (C2H6) burns with oxygen to produce carbon dioxide and water. A sample of ethane was burned completely and the water that formed had a mass of 1.61g. How much ethane, in moles and in grams, was in the sample?

asked by Shabear on November 10, 2010
Chemistry
Ethane (C2H6) burns with oxygen to produce carbon dioxide and water. A sample of ethane was burned completely and the water that formed had a mass of 1.61g. How much ethane, in moles and in grams, was in the sample?

asked by Shabear on November 10, 2010

Chemistry
If 10.5 g of hydrogen, H2, were mixed with 6.51 g of acetylene, C2H2, and allowed to react according to the following equation, what is the theoretical yield of ethane, C2H6, produced? If 7.00 g of ethane, C2H6, were recovered at the end of the reaction,

asked by C.M. on April 26, 2013
Biology 12
The question is asking to calculate the overall energy change in the combustion of ethane (C2H6). This is what I have done: The balanced equation: C2H6 + 6 O2 –> 2 CO2 + 3 H2O (6) 411 + 346 + (6) 494 –> (2) 799 + (3) 459 2466 + 346 + 2964 –> 1598 + 1377

asked by Vikki on March 11, 2015
chemistry
132gram o2 is required for a combustion of 28 liter mixture of ethane and ethene (at NTP) than find out mole fraction of ethane and ethene in the mixture?

asked by rekha on August 12, 2015
Chemistry
How to write the equation for the combustion of ethane C2H6?

asked by Rene on October 5, 2013
chemistry
Organic hydrogenation reactions, in which H2 and an “unsaturated” organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 132 kJ is given off per mole of C2H4 reacting,

asked by mara on October 23, 2015
chem 211
Organic hydrogenation reactions, in which H2 and an “unsaturated” organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 144 kJ is given off per mole of C2H4 reacting,

asked by beti on October 18, 2013
Chemistry
Organic hydrogenation reactions, in which H2 and an “unsaturated” organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting,

asked by HELP ! on October 22, 2010
Chemistry
Organic hydrogenation reactions, in which H2 and an “unsaturated” organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting,

asked by Jo on October 19, 2010
Chemistry
During its combustion, ethane combines with oxygen to give carbon dioxide and water. A sample of ethane was burned completely and the water that formed has a mass of 1.61 grams. How many grams of ethane were in the sample?

asked by Margaleta on August 18, 2015
chemistry
When a 6.79-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 369 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3 kJ mol-1

asked by abby on March 1, 2014

chemistry
When the equation for combustion for ethane is balanced using integer coefficients, the ΔH for the reaction = -2834 kJ. How many grams of ethane must be burned in order to heat 277.3 grams of water from 54.0°C to the boiling point and then boil all of it

asked by Riese on April 16, 2015
Chemistry
Calculate the enthalpy change per gram for the combustion of ethane (C2H6(g)).

asked by Billy on December 4, 2010
Chemistry
Consider the combustion of ethane: 2C2H6(g)+7O2(g)–>4CO2(g)+6H2O(g) If the ethane is burning at the rate of 0.7 mol/L × s, at what rates are and being produced?

asked by Jack on May 14, 2015
Chemistry
Ethane (C2H6) reacts with oxygen to produce carbon dioxide and water. Assuming there is an excess of oxygen, calculate the mass of CO2 and H2O produced from 1.25 g of ethane

asked by Kelly on January 11, 2012
chemistry
2C2H6+702=4CO2+6H20 how many grams of oxygen are required to completely burn60.0g ethane (C2H6) show work Using the above equation how many Lof 02 are required to burn 20.0Lof ethane thank u soo much this is for a test

asked by megan on May 1, 2012
chemistry
if 15 grams of ethane gas c2h6, reacts with 128 g oxygen un a combustion reaction, how many moles of water can be produced?

asked by jen on January 31, 2016
Chemistry
Ethane, C2H6, forms ·CH3 radicals at 700.°C in a first-order reaction, for which k = 1.98 h-1. (a) What is the half-life for the reaction? (b) Calculate the time needed for the amount of ethane to fall from 1.00 10-3 mol to 2.48 10-4 mol in a 500. mL

asked by Sara on June 28, 2013
CHEMISTRY: URGENT
30cm^3 of a mixture of methane and ethane were mixed with 100cm^3 of oxygen at ordinary temperature and pressure and exploded. After cooling the residual gases occupied 61.5cm^3. Find the percentage by volume of each gas in the mixture, methane (CH4) and

asked by LC on October 29, 2012
CHEMISTRY
A 8.90-g sample of ethane, C2H6, is mixed with 18.8 atm of O2 (an excess) in a 1.50 L combustion chamber at 130.0°C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 130.0°C. What is the final pressure in the

asked by Matt on January 17, 2008
science/ chemistry
Over 80 000 vehicles per day pass the site and the traffic is frequently congested. The surrounding area is described as forming a street canyon. The temperature at the site had reached 25 °C by 08:00, when the ethane concentration was recorded as 7.09

asked by Nicolas on September 14, 2008

CHEM
a mixture of 10cm3 of methane and 10cm3 of enthane was sparked with an excess of oxygen. after coolin to room temp, the residual gas was passed through aq KOH. what volume of gas was absorbed by the alkali ? Write the equations for CH4 + O2 and C2H6 + O2.

asked by Pet on May 29, 2007
Chemistry
In the dehydrogenation of ethane two reactions take place: C2H6 => C2H4 + H2 C2H6 + H2 => 2CH4 The mass distribution of the product is: 27% C2H6; 33% C2H4; 13% H2; 27% CH4. 1. What was the conversion of C2H6 to CH4? 2. What was the yield of C2H4 expressed

asked by Hoang on November 24, 2016
Chemistry
Calculate enthalpy of reaction C2H4 + H2 gives C2H6.enthalpy of combustion of ethene, H2,and ethane are -1410,-286,-15.60kj/mol respectively

asked by Shaika on November 7, 2016
Chemistry
What volume of oxygen gas is needed for the complete combustion of 4.00 L of ethane gas, C2H6? Assume that the temperature and pressure of the reactants are the same.

asked by Lauren on May 7, 2016
chemistry
I need help with a,b,and c. I tried to balance it but im having a little trouble Ethane gas, C2H6, burns in air and produces carbon dioxide and water vapor. a)write a balanced equation for this reaction. I know this isnt balanced but is this what im

asked by beth25 on March 25, 2007
Chemistry
Calculate the heat generated by the complete combustion of 15.0g of ethane.

asked by Mrs MM on February 8, 2012
chemistry
when a 8.77g mixture of methane, and ethane is burned in oxygen at constant pressure, 476.6kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3kJ/mol and

asked by Anonymous on November 22, 2010
Chemistry
How many molecules of ethane (C2H6) are present in 0.249 g of C2H6? Enter answer in scientific notation.

asked by Tessa on February 19, 2013
chemisrty
a. At low temperatures, 1,1,2, trichloro ethane is not free to rotate about the carbon-carbon bond. It will be stuck in its lowest energy position. Is 1,1,2, trichloro ethane a chiral molecule when trapped in this position? 1,1,2, trichloro ethane is

asked by Anonymous on June 1, 2013
Chem
Consider the following equation in chemical equilibrium C2H4(g) C2H6(g) + 137 kJ What happens to the ethane (C2H6) when the temperature of the system is increased

asked by David on July 30, 2016

Chmistry
For the following reaction, 4.35 grams of hydrogen gas are allowed to react with with 10.3 grams of ethylene (C2H4). hydrogen (g) + ethylene (C2H4) (g) ethane (C2H6) (g) What is the maximum amount of ethane (C2H6) that can be formed? grams What is the

asked by Austin Jekins on December 4, 2010
chemistry
How many molecules of ethane (C2H6) are present in 0.524 g of C2H6?

asked by matt on January 28, 2011
Chemistry
Given the reaction 2C2H6 + 7O2 → 4CO2 + 6H2O ∆H = -1416 kJ/mol C2H6 a. How many liters of Carbon Dioxide would be produced if 16.00 L of ethane, (C2H6), were burnt (all at STP)? b. How many liters of water vapor would also be produced? c. How many

asked by Shenette on December 16, 2012
Chmistry
For the following reaction, 4.35 grams of hydrogen gas are allowed to react with with 10.3 grams of ethylene (C2H4). hydrogen (g) + ethylene (C2H4) (g) ethane (C2H6) (g) What is the maximum amount of ethane (C2H6) that can be formed? grams What is the

asked by Austin Jekins on December 4, 2010
Chemistry
The combustion of how many moles of ethane would be required to heat 838 grams of water from 25.0 to 93.0 degrees C? Assume liquid water is formed during the combustion.

asked by k on November 2, 2012
chemistry
A closed container has a mixture of methane, CH4, ethane C2H6, and propane C3H8. If 12.5 g of methane, 36.0 g of ethane, and 14.0 g of propane have a total pressure of 890. mm Hg, what is the partial pressure of each of the gases in the container?

asked by josh on April 15, 2012
Chemistry
1) A quantity of 85 mL of .900 M HCl is mixed with 85 mL of .900 M KOH in a constant-pressure calorimeter that has a heat capacity of 325 J/C. If the initial temperatures of both solutions are the same at 18.24 degrees C, what is the final temperature of

asked by Vince on November 18, 2014
Chemistry
How many moles of ethane does it take to produce 8112 KJ in the reaction 2 C2H6 + 7O2 yields 4 CO2 + 6 H2O + 3120 KJ? I got 8112 kJ x 2 moles ethane/3120 kJ (5.2 moles).

asked by Narasaq on June 3, 2009
chemistry
Determine the mass of carbon(iv)oxide produced on burning 104g of ethane (c2 H2 ) C= 12, h= 1, o=16. 2(2 H2 + 502 4 co2 +2H2 0 12×2+1 ×2 4 ×(12+16 ×2) 26g 176g Amount = molar mass. 104/26 =4 mols.of ethane 2mol c2 H2 4 4 mol 11=x x=(4 ×4)/2 =8 mole

asked by gozie on October 24, 2018
fountain of knowledge international academy
A metal x with relative atomic mass of 56forms an oxide with formul X2O3 .How many grams of the metals will combine with 10g of oxygen Ethane burns completely in oxygen according to the equations below C2H6+7¡2O2~2CO +3H2O what is the amount in moles of

asked by Blessing on October 17, 2016

chem/plz/check work studying for a final
what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 Latm/molK)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L

asked by julia on December 16, 2010
chem/plz/check work studying for a final
what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 Latm/molK)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L

asked by julia on December 16, 2010
Chemistry
Ethane gas, or dicarbon hexahydride, undergoes combustion to produce carbon dioxide gas and water vapor. A.) What mass of the un named reactant is required to react with moles of ethane? B.) How many molecules of the porduct, with the smaller percent

asked by Anonymous on May 9, 2011
Chemistry
Ethane gas, or dicarbon hexahydride, undergoes combustion to produce carbon dioxide gas and water vapor. A.) What mass of the un named reactant is required to react with 2.20 moles of ethane? B.) How many molecules of the porduct, with the smaller percent

asked by Anonymous on May 9, 2011
College Chemistry

  1. What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it? 2. A 30.5 g sample of an alloy at 94.0°C is placed into 48.7 g water at 20.3°C in an insulated coffee

asked by Nevaeh on October 20, 2010
chemistry
The combustion of ethane produces carbon dioxide and water. If 27.6 g C2H6 are burned in the presence of excess air (O2) and 76.7 g of carbon dioxide are produced, what is the percent yield?

asked by Alexander on November 8, 2017
Chemistry 111
Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 17. g of ethane is mixed with 107. g of oxygen. Calculate the minimum mass of ethane that could be left over by the chemical reaction. Be sure your

asked by Greg on October 22, 2014
AP Chemistry help!!!!!
How does the boiling point of ethane (CH3CH3) compare with that of ethanol (CH3CH2OH)? 1. The boiling point of ethane is higher because it has stronger London dispersion forces. 2. The boiling point of ethane is higher because it has stronger dipole-dipole

asked by Stephen on August 18, 2016
Chemistry
Write a balanced equation for the combustion of gaseous ethane (C2H6) a minority component of natural gas, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

asked by Christine on November 6, 2012
Chemistry
A chemical reaction yields 3 moles of lithium hydroxide (LiOH). How many grams of lithium hydroxide are present? 24 g 48 g 72 g When ethane (C2H6) burns, it produces carbon dioxide and water: 2C2H6 (g) + 7O2 (g) 4CO2 (g) + 6H2O (l) How many moles of water

asked by jimm on April 8, 2015

Chemistry
If 5.27 mol of ethane (C2H6) undergo combus-tion according to the unbalanced equation C2H6 + O2 −! CO2 + H2O, how much oxygen is required? Answer in units of mol. Thanks!

asked by Randy on January 18, 2010
Chemistry
The decomposition of ethane, C2H6, is a first-order reaction. It is found that it takes 212 seconds to decompose 0.00839 M C2H6 to 0.00768 M. What is the rate of decomposition (in mol/L-h) when [C2H6] = 0.00422 M? A. 6.43 x 10^-3 mol/L-h B. 6.34 x 10^-5

asked by Saoirse on September 10, 2017
Chemistry
The density of ethane, C2H6, at 25 oC and 1.10 atm is _.

asked by Helpless on November 6, 2012
Chemistry
Three gases (8.00 g of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 ∘C, the total pressure in the container is 4.40 atm . Calculate the partial pressure of each gas in the

asked by Niles on July 11, 2018
chemistry
Three gases (8.00 g of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 ∘C, the total pressure in the container is 5.20 atm . Calculate the partial pressure of each gas in the

asked by sargun on September 29, 2017
chemistry
Three gases (8.00 g of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 ∘C, the total pressure in the container is 4.50atm . Calculate the partial pressure of each gas in the

asked by liz on May 1, 2015
physics
If 842 J of heat is needed to increase the temperature of ethane gas (C2H6) in a 15 litre container from 237 K to 400 K, how much gas is in the container

asked by serena on November 18, 2010
chem
A 1L flask is filled with 1.25 g of argon at 25 degrees celcium. A sample of ethane vapor is added to the same flask until the total pressure is 1.45 atm. What is the partial pressure of argon in the flask? Chemistry – DrBob222, Tuesday, October 5, 2010 at

asked by kris on October 24, 2013
chemistry:URGENT
How to convert (a)ethane to propanone (b)propanone to ethane (c)isobutane to propanone (d)methane to benzene (e)benzene to methane (f)ethyne to methane (g)propanone to benzene (h)ethene to propene (i)Propan-2-ol to Propan-1-ol

asked by sashank on March 1, 2010
chemistry
What is the combustion of ethane (dicarbon hexahydride)

asked by eduardo on February 10, 2014

chemistry
C2H6 + O2 -> CO2 + H2O How many g of carbon dioxide are produced at the same time as 360g of water vapor in the burning of ethane

asked by stephen on March 3, 2013
Chemistry
If 10.5 g of hydrogen, H2, were mixed with 6.51 g of acetylene, C2H2, and allowed to react according to the following equation, what is the theoretical yield of ethane,C2H6 produced.

asked by Anonymous on April 24, 2013
Chemistry
What are the enthalpy, entropy, and free energy for the hydrogenation of ethene (C2H4) to ethane (C2H6) at 25 degrees. Is this a spontaneous process and how can you tell?

asked by anonymous on April 22, 2012
Chemistry
Please also, help me set up this problem. Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is C2H2(g)+2H2(g)⇌C2H6(g). Given the following data at standard conditions (all pressures equal to 1 atm and

asked by Lindsey on November 16, 2014
AP Chemistry
The reaction of the molecules to produce ethane is C2H4(g) + H2(g) → C2H6(g). A mechanism for this reaction is shown below: (The figures show how the ethene molecule with two hydrogen molecules attached ‘binds’ to

asked by Sophie on April 1, 2018
Chemistry
Give the molecular formula for the following: 1)Methoxy methane 2) Methoxy Ethane 3) Ethoxy ethane

asked by Gary on May 24, 2015
Chemistry
I. C(s) + O2(g) → CO2(g) ΔHf = −394 kJ II. H2(g) + O2(g) → H2O(l) ΔHf = −242 kJ III. 2C(s) + 3H2(g) → C2H6(g) ΔH =−84 kJ The combustion of C2H6 is shown by the following equation: C2H6(g) + O2(g) → 2CO2(g) + 3H2O(l) Which option correctly

asked by Summer on April 9, 2018
chemistry
Hello, a few questions: Thanks so much! 1. The heat capacities of titanium and water are 0.522 J g-1 K-1 and 4.184 J g-1 K-1, respectively. What is the final temperature of the titanium-water mixture if a 175.0-g sample of titanium, initially at 90.0oC, is

asked by abby on March 1, 2014
CHEMISTRY
calculate the weight of co2 by complete combustion of 1.5 \g of ethane

asked by ATHARV Singh on October 2, 2016
Chemistry
Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is: C2H2(g) + 2H2(g) === C2H6(g) Given the following, what is the Kp for the reaction? C2H2(g): 209.2 ΔG˚f (kJ/mol) H2(g): 0 ΔG˚f (kJ/mol) C2H6(g):

asked by Ezra on March 31, 2013

science/ chemistry
Ethane (C2H6) is one of the many products of combustion of iso-octane, an important component of petrol. After release into the atmosphere, it is attacked by the hydroxyl radical, HO•, leading to its oxidation in the cycle of reactions when in a NOx-rich

asked by Nicolas on September 14, 2008
chemistry
Ethane(a minor constituent of natural gas) burns in oxygen to form carbon dioxide and water. How many moles of oxygen are needed to react with one moles of ethane?

asked by micha on April 19, 2017
Chemistry
How many ethane molecules are there in 0.0300 mole of methane

asked by Bryce on October 25, 2012
college chemistry
When ethane reacts with oxygen to form carbon dioxide and water. When 10 molecules of ethane react with 20 molecules of oxygen, what is the composition of the FINAL mixture?

asked by maribel on July 12, 2012
chem– delta H
In your search for fuel to use after the reserves of gasoline dry up, you decided to analyze different compounds (2 hydrocarbons & an alcohol) by combustion. You independently combust methane (CH4), ethane (CH3CH3), and ethanol (CH3CH2OH) at 298 K and 1

asked by Emma on October 23, 2013

Categories
dissertation help essay writing service help me write my essay write my dissertation for me

the two blocks in the figure(figure 1) are sliding down the incline.

physics pre-ap
A(n) 1100 kg car is parked on a 4 incline. The acceleration of gravity is 9.8 m/s2 . Find the force of friction keeping the car from sliding down the incline. Answer in units of N

asked by madison on November 15, 2012
physics
A block is at rest on the incline shown in the figure. The coefficients of static and kinetic friction are µs = 0.4 and µk = 0.34, respectively. The acceleration of gravity is 9.8 m/s. What is the largest angle which the incline can have so that the mass

asked by king on September 22, 2015
physics
sorry i have about 5 questions on this homework packet that i just can’t figure out…. hope you can help me A bowling ball (mass = 7.2 kg, radius = 0.12 m) and a billiard ball (mass = 0.41 kg, radius = 0.028 m) may each be treated as uniform spheres. What

asked by kelly on September 12, 2010

Physics
A string going over a massless frictionless pulley connects two blocks of masses 6.4 kg and 13 kg. As shown on the picture below, the 6.4 kg block lies on a 32◦ incline; the coefficient of kinetic friction between the block and the incline is μ= 0.3.

asked by mallak on February 21, 2014
Physics
A string going over a massless frictionless pulley connects two blocks of masses 6.4 kg and 13 kg. As shown on the picture below, the 6.4 kg block lies on a 32◦ incline; the coefficient of kinetic friction between the block and the incline is μ= 0.3.

asked by Emeera on March 6, 2014
physics
A 19.62 kg block is sliding down a 34.52 degree incline at a constant velocity. What is the mu k of kinetic friction between the incline and the block?

asked by zack on January 15, 2016
Physics
Alex is exploring a cave that has a slight incline and is iced over, forcing her to use ice cleats to explore it. After climbing 50 m into the cave, she finds what she is looking for and she takes out her ice pick and hammer to begin removing the stones.

asked by bri on November 29, 2015
physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string. (one mass is on the incline, the other is hanging from the pullye) The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between

asked by Kelsey on March 10, 2010

Categories
buy dissertation online essay writing service write my assignment write my dissertation for me

for the following battery: cd(s) | cdcl2(aq) || cl–(aq) | cl2(l) | c(s)

For the following battery: Cd(s) | CdCl2(aq) || Cl–(aq) | Cl2(l) | C(s)

(a) Write the reduction half-reaction occuring at the C(s) electrode. (Include physical states of reactants and products.)

C(s) electrode:?

(c) Calculate the mass of Cl2 consumed if the battery delivers a constant current of 589 A for 82.0 min. ?

Please help! thank you!

0 0 267
asked by Linda
May 6, 2013

Categories
dissertation help do my assignment essay writing service essays online write my dissertation for me

if two particles have equal kinetic energies, are their momenta equal?

If two particles have equal kinetic energies, are their momenta necessarily equal?
21,104 results
physics
If two particles have equal kinetic energies, are their momenta necessarily equal?

asked by Anonymous on November 8, 2007
Physics

  1. Two people of unequal mass are initially standing still on the ice with negligible friction. They then simultaneously push each other horizontally. Afterward, which of the following is true? * -The center of mass of the two person system moves in the

asked by Lexie on January 26, 2015
Physics
For incomplete cancellation to occur, opposite pulses must have equal amplitudes different energies equal pulses equal displacements it seems like none of these are quite right but would different energies be the closest.

asked by Katie on May 7, 2008
Calculus
Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is

asked by Madeline on December 19, 2012
Calculus
Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is

asked by Madeline on December 19, 2012

Physics
A lighter block (2 kg) and a heavier block (8 kg) sit on a frictionless surface. Both blocks are initially at rest. The same force of 4 N then pushes to the right on each block for a distance of 9 m. What are the changes in kinetic energy of the blocks?

asked by Anonymous on April 20, 2016
physics
If the momentum of one object changes in a system that is subject to no net external force, what else must happen? 1) Collisions with other objects will change its momentum back. 2) The momenta of the other objects in that system change in the same way. 3)

asked by Katelyn on October 18, 2016
Chemistry
Two rigid containers of equal volume hold hydrogen and argon gases respectively at the same temperature and pressure. Which of the following statements is(are) false ? A) The two containers hold an equal mass of gas. B) The two containers hold an equal

asked by Gina on February 18, 2011
Physics Classical Mechanics
The figure below shows the experimental setup to study the collision between two carts. In the experiment cart A rolls to the right on the level track, away from the motion sensor at the left end of the track. Cart B is initially at rest. The mass of cart

asked by Anonymous on October 28, 2013
Science
Two balls of equal masses roll with velocities v and 4v,respectively .What is the ratio of their Kinetic Energies?

asked by Aman on August 16, 2018
physics
A planet A of mass m is in a circular orbit of radius “a” around a star ( M_star >> m ). Another planet B with the same mass m is in an elliptical orbit around the same star with its length of the semi-major axis equal to “a” . We have just learned that,

asked by ashok on November 15, 2013
Physics please HELP
A planet A of mass m is in a circular orbit of radius “a” around a star ( M_star >> m ). Another planet B with the same mass m is in an elliptical orbit around the same star with its length of the semi-major axis equal to “a” . We have just learned that,

asked by ashok on November 15, 2013
Physics( Checking answer)
Sorry for re-posting but I really need to know if I did it right. Please someone help! Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of

asked by Cory on October 31, 2010
Physics(checking answer)
Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic energies? I got 60 for the first bullet and 120 for the second. I am not

asked by Cory on October 31, 2010
physics
a body of mass3kg and body of mass 2kg are dropped simultaneously from height of 14.9 m calculate their momenta and their kinetic energies when they are 5m above the ground

asked by DEEPI on January 5, 2018

physics! help!
For incomplete cancellation to occur, opposite pulses must have A. equal amplitudes B. different energies C. equal pulses D. equal displacements is it B??

asked by sophie on April 4, 2009
Physics.

  1. What happens when a wave reaches the boundary of a new media? A. it would reflect back B. it would continue moving C. either A or B D. it would stop Would it be C? For incomplete cancellation to occur, opposite pulses must have A. equal amplitudes B.

asked by Lanie. on May 18, 2009
physics
Coulomb’s Law do two charges have to be equal for any given force. Question: do equal angles necessarily imply that the charges on the 2 are equal, explain.

asked by Sarah (C) on July 7, 2011
AP Physics
Hi! Thank you very much– I know this is a 2dimensional inelastic collision but i’m not sure how to solve– “The mass of a blue block is 20% greater than the mass of the green block. Before colliding, the blocks approach each ther with momenta of equal

asked by APpreciative student on November 21, 2010
physics
Q 2) A particle executes simple harmonic motion with an amplitude of 10 cm. At what distance from the mean position are the kinetic and potential energies equal ?

asked by Pronab on November 20, 2010
Physics-Kinetic energy
Two 2.0 g bullets are fired with speeds of 40.0 m/s and 80.0 m/s, respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic energies? A car has kinetic enery of 4.32* 10^5 when traveling at a

asked by Pablo on October 30, 2010
Physics
Two identical cars are traveling at the same speed. One is heading due east and the other due north, as the drawing show. What is true regarding the kinetic energies and momenta of the cars?

asked by david on October 24, 2010
physics
Two identical cars are traveling at the same speed. One is heading due east and the other due north, as the drawing show. What is true regarding the kinetic energies and momenta of the cars?

asked by jo on October 23, 2010
science
1.which two particles are found in an atoms nucleus? 2. which two particles in an aton are equal in number? 3. what two particles account for almost all of the mass of an atom?

asked by yuku on October 29, 2010
Math
My question is this: If two sets are equal does that mean that they are necessarily equal?

asked by B.B. on June 4, 2009

random variables
For the standard normal random variable Z, compute the following probabilities. For the following problems, use four decimal places. 16. P (0 less than or equal to Z less than or equal .9) 17. P (-1.3 less than or equal to Z less than or equal to) 18. P(Z

asked by Felicia on August 2, 2010
physics
A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction of motion. Find the angle

asked by mike on March 13, 2011
Physics
A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction of motion. Find the angle

asked by Pardis on March 14, 2011
Physics
A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction of motion. Find the angle

asked by Pardis on March 13, 2011
physics 2

  • Matter is made of charged particles – The motion of charged particles produces electromagnetic waves – Since light is an electromagnetic wave, the color of a substance is ultimately related to the way that charged particles in that substance can move

asked by Daniella on August 7, 2014
physics 2

  • Matter is made of charged particles – The motion of charged particles produces electromagnetic waves – Since light is an electromagnetic wave, the color of a substance is ultimately related to the way that charged particles in that substance can move

asked by lost physics 2 student on August 7, 2014
Math
1) When will the dependent variable in the equation y=√x+4-3 equal or exceed to 4? A) x > or equal to -0.17 B) x > or equal to 45 C) x > or equal to 48 D) x > or equal to 53 2) The function t=√d/16 models the time (t) in seconds that an object has been

asked by Tia on April 7, 2015
Math
If two set are equal are they necessarily equal? I say no but I am really not sure. Thanks.

asked by B.B. on June 4, 2009
Chemistry
What change would occur in the kinetic energy of vapor if a container of vapor is placed at 0 Kelvin? A.The kinetic energy of gas particles will increase. B.The kinetic energy of gas particles will decrease. C.The kinetic energy of gas particles will

asked by HS Student on January 20, 2018
Calculus
Consider the function f(x)=6x-cos(x)+5 on the interval 0 is less than or equal to x, and x is less than or equal to 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c)=k for which values of c and k? Fill in the following

asked by Anonymous on February 1, 2012

Math
Hi everyone, my name is Emerson. I was wondering if anybody could help me on a test. I’m stuck on some, but I think I know some others. Thank you! 1. Translate the phrase “nine more than two times a number” in to an algebraic expression. A. 9x + 2 B. 2x +

asked by Emerson on December 7, 2015
Physics Class 11th
I have read about Translatory Motion it says “It is that motion in hwich body, which is not a point mass body is moving such that all its constituent particles move simultaneously along parallel straight lines and shift through equal distance in a given

asked by Akashdeep on August 6, 2009
calculus
Consider the function f(x)=65x−cos(x)+2 on the interval 0 less than or equal to x less than or equal to 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c)=k for which values of c and k? Fill in the following mathematical

asked by lauren on February 2, 2012
Chemistry
A sealed flask containing 1.0 mole of H (g) and a sealed flask containing 2.0 moles of He(g) are at the same. 2 temperature. The two gases must have equal 1. masses 2. volumes 3. average kinetic energies 4. numbers of molecules

asked by . on April 12, 2009
Chemistry
A sealed flask containing 1.0 mole of H2(g) and a sealed flask containing 2.0 moles of He(g) are at the same temperature. The two gases must have equal 1. masses 2. volumes 3. average kinetic energies 4. numbers of molecules

asked by . on April 12, 2009
physics
One particle has a mass of 3.0010-3 kg and a charge of +7.60 µC. A second particle has a mass of 6.0010-3 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between

asked by Ann on February 3, 2007
Physics
The (nonconservative) force propelling a 1.50E3 kg car up a mountain road does 4.70E6 j of work on the car. The car starts from rest at sea level and has a speed of 27.0 m/s at an altitude of 2.00E2 m above sea level. Obtain the work done on the car by the

asked by Matoro on December 9, 2012
Physics
An experiment is designed in which a proton and an antiproton collide, producing a particle with mass 9700 MeV. What must be the incident kinetic energies and velocities of the colliding particles?

asked by Anonymous on October 30, 2014
chemistry
which of the following would be expected to have the lowest freezing temperature? a. Ca(NO3)2 b. NaC2H3O2 c. CuSO4 d. HC2H3O2 e. C2H5OH per what? per gram? per mol? Any could have the lowest freezing point if I put a cup of any one and a scant amount of

asked by mary on April 21, 2007
Science
Which of the following is not a postulate of the kinetic molecular theory? A. The collisions between gas molecules are elastic. B. The energy of a gas molecule is determined by quantum mechanics. C. Gas molecules travel in random, straight paths. D. The

asked by Science on August 18, 2016

CHEMISTRY!!
Which of the following is NOT a postulate of the kinetic molecular theory? A; the average kinetic energy of the particles is directly proportional to the absolute temp. B;the forces of attraction and repulsion between the particles are insignificant C:the

asked by Andy on May 10, 2010
Physics
One ball has 7 times the mass and twice the speed of another. 1. How does the momentum of the more massive ball compare to the momentum of the less massive one? Find the ratio of the momenta. 2. How does the kinetic energy of the more massive ball compare

asked by Mike on June 18, 2016
Physical Science Just One Question PLEASE HELP!
In an exothermic reaction, the amount of energy required to break the attractions among the solute particles and among the solvent particles is A) greater than the energy released as attractions form between solute and solvent particles. B) less than the

asked by ^_^ on December 12, 2011
math

  1. The tennis team is selling key chains as a fundraiser. If its goal is to raise is at least 180, how many key chains must it sell at $2.25 each to meet that goal? Write and solve an inequality. a. 2.25k (greater than or equal to) 180; k (greater than or

asked by john on October 18, 2016
science
You know that a collision must be “elastic” if: The momentum of the two-object system doesn’t change The sum of the final kinetic energies equals the sum of the initial kinetic energies There is no change in the internal energies of the objects (thermal

asked by sara on July 24, 2014
Math
I have two problemson polygonal convex sets which I do not understand. The first: Find the minimum value of f(x,y) = 2x-y+2 for the polygonal convex set determined by this system of inequalities: x is more than or equal to 1 x is less than or equal to 3 y

asked by Joanie on January 20, 2009
Algebra–Correction?
Solve x^2 -3x is greater than or equal to 10 Would the solutions be x=5 and x= -2? Here’s how I figured it. x^2-3x is greater than or equal to 10. I subtracted 10 from both sides. This left me with x^2-3x-10 is greater than or equal to 0. Next, I factored

asked by Anonymous on October 13, 2009
physics
1)For incomplete cancellation to occur, opposite pulses must have. A)equal amplitudes B)different energies C)equal pulses D)equal displacements I think there is a typo on A because my book reads: if the opposite pulses have unequal amplitudes, cancellation

asked by Jon on April 6, 2008
Science
For a reaction to occur, the energy of the system must meet the activation energy threshold. Which best explains why increasing the temperature increases the rate of a reaction? A) Because more particles spread out away from each other B) Because more

asked by Kaylee on February 15, 2019
physics
A circular curve on a highway is designed for traffic moving at 27 m/s. The radius of the unbanked curve is 160 m. What is the minimum coefficient of friction between tires and the highway necessary to keep cars from sliding off the curve? Is the friction

asked by Anonymous on February 27, 2014

Bose gases, quantum physics.
A hypothetical gas consists of four indistinguishable particles. Each particle may sit in one of five allowed quantum states, with energies ε,3ε,5ε,7ε and 9ε. Assume that the total energy of the gas is fixed at 16ε. (a) If the particles are bosons:

asked by Anon on May 4, 2018
Physics
Two charged particles have equal mass and carry charges of 2 nC and 3 nC respectively. They enter a magnetic field of strength 2 mT at the same velocity. Assuming that both particles exit the field parallel to each other and perpendicular to the field,

asked by Brian on August 14, 2015
math
State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test the following statements. (a) The linear correlation coefficient is positive. Ho: ñ —Select— not equal to equal to greater than less than 0 Ha: ñ

asked by Sue 12 on May 30, 2013
Physics
Two particles A and B,are of equal mass,and moving towards each other,with speeds of 3m/sand 2m/s respectively and collide.Particle B then strikes a plane surface,which is perpendicular to its direction of motion and the rebounce.If the coefficient of

asked by Mercypraise on September 13, 2016
physics
Hello, I’m trying to figure out which of the following statements are TRUE. I suspect that 2, 6, 8 are true…and that there is one more that is true, but not sure which one? Thanks! It is impossible to have a collision between two objects in which the

asked by John on October 29, 2011
Physics
Hello, I’m trying to figure out which of the following statements are TRUE. I suspect that 2, 6, 8 are true…and that there is one more that is true, but not sure which one? Thanks! It is impossible to have a collision between two objects in which the

asked by Anonymous on October 29, 2011
Chemistry
Four particles have free access to distribute into four different energy levels 0,5,10, and 20J. If these four particles are to create two macrostates having total energies 10J and 40J, which macrostate has more entropy?

asked by Catherine on April 18, 2013
i lied. very quick calc problem.
f(x) = abs(sin(x)), -pi less than or equal to x less than or equal to pi g(x) = x^2 let H(x) = g(f(x)) i got that H(x) would equal sin^2(x). THIS IS WHERE I AM STUCK! find the domain of H. do i still need to account for “-pi less than or equal to x less

asked by jane on February 20, 2009
ap stats
Continuous Random Variable, I Let X be a random number between 0 and 1 produced by the idealized uniform random number generator described. Find the following probabilities: a.P(0less than or equal to X less than or equal to 0.4) b.P(0.4 less than or equal

asked by jaz on March 18, 2009
stats
Continuous Random Variable, I Let X be a random number between 0 and 1 produced by the idealized uniform random number generator described. Find the following probabilities: a.P(0less than or equal to X less than or equal to 0.4) b.P(0.4 less than or equal

asked by chris on March 18, 2009

science
Which statements best describe how the properties of gases and plasmas differ? (Select all that apply). The particles of plasmas have a higher kinetic energy than the particles of gases. Gas particles are charged while plasma particles are uncharged.

asked by lydia on August 21, 2017
Physics
True or false?equal masses of two different gases placed in containers of equal volume at equal temperature must exert equal pressures

asked by John on January 21, 2013
Business Math
Using the simplex method, solve the following linear programming problem: Maximize: P= 5x+2y Subject to: 4x+3y < or equal to 30 2x-3y < or equal to 6 x > or equal to 0, y > or equal to 0.

asked by Colleen on December 9, 2012
Algebra
I have to solve an inverse function. f(x)=x+6 and g(x)=x+6 f(x)=1/4x,x is equal to or not equal to 0 g(x)=1/4x,x is equal to or not equal to 0 Please help me I have been on this one problem for hours and I can’t get it. This one question will determine

asked by Beth on August 5, 2013
Algebra
What is the quotient 6-x/x^2+2x-3 divided by x^2-4x-12/x^2+4x+3 in simplified form? State any restrictions on the variable A: -(x+1)/(x-1)(x+2) x does not equal -3, -2, 1, and 6 B: -1/(x+2) x does not equal -3, -2, and 6 C: -(x+1)/(x-1)(x+2) x does not

asked by Leon on May 22, 2017
Statistics
Let Y be a random number between 0 and 1 generated by an idealized random number generator. Find the following probabilities: A. P (0 less than equal to Y less than equal to .6) =? B. P (.3 less than equal to Y less than equal to .5) =? C. P ( Y less than

asked by Julia T on May 19, 2010
Fun Fact!
Benjamin Franklin complained, “Let the smaller Colonies give equal money and men, and then have an equal vote. But if they have an equal vote without bearing equal burthens, a confederation upon such iniquitous principles will never last long.” Franklin

asked by Jenna on February 25, 2007
Physics
In DESPERATE NEED OF HELP!!! An object of mass m = 10 kg and speed v = 2 m/s collides head on with a second object of mass m = 5 kg which has a speed v = 1 m/s. The objects stick together. There are no external forces on the two objects (note the given

asked by Carl on November 10, 2016
physics
The mass of the blue puck shown below is 10.0% greater than the mass of the green one. Before colliding, the pucks approach each other with momenta of equal magnitudes and opposite directions, and the green puck has an initial speed of 8.0 m/s. Find the

asked by mightymouse on March 23, 2009
math
9x+5greater than or equal to -40 or 7x+3greater than or equal to -11 solve and graph I got the answer of x greater than or equal -5 or x is greater than or equal to -2 as the solution to this equations, but how do i put this into a soltuion set the way

asked by Jen on January 29, 2010

Math
What is the solution to the nearest tenth to the equation below? -3x -14 less than or equal to -5 * sorry if í wrote the question weird but í couldn’t do some equation signs* A. X less than or equal to -3 B. X less than or equal to 3 C. X greater than or

asked by Anonymous on August 28, 2017
Algebra
If 1.2 is (less than or equal to) a (less than or equal to 5.1 and 3 (less than or equal to) b (less than or equal to 6) Then find the highest possible value for the quotient a/b. Give your answer as a decimal. Would it be 1.2/3, or 0.4. Thank you!

asked by Dulcibella on January 19, 2009
Math
The non-permissible values for the expression -9x+8 divided by -9x^2-55x+56 are? a) x does not equal -8/9 b)x does not equal 8 c) x does not equal 8/9 and x does not equal -7 d) there are no restrictions

asked by Alex on December 10, 2014
Physics
An object of mass m travels halfway around a circle at a constant speed v. The magnitude of the total work done on the object by the net force acting on it (not counting starting and stopping at the beginning and end of the path) is a. equal to mv b. equal

asked by Ramsey on June 3, 2011
Algebra
The (absolute value) x-20 (absolute value) is less than or equal to 6. I did it first with six positive and got x is lesss than or equal to 26. Then I made the six negative and got x is less than or equal to 14. But this is impossible for these to both be

asked by Andrea on October 12, 2009
Chemistry
Are the concentrations of CO, H2O, CO2 and H2 necessarily equal

asked by Heather on April 16, 2012
chemistry
An ideal liquid solution has two volatile components. In the vapor in equilibrium with the solution, the mole fractions of the components are (a) both 0.50; (b) equal, but not necessarily 0.50; (c) not very likely to be equal; (d) 1.00 for the solvent and

asked by anonymous on February 20, 2010
Algebra
A student keeps track of his target heart rate when he is exercising. The range for the number of heart beats per minute R for someone his age is /R-136/ less than or equal to 20. Determine the solution to the inequality. I believe the answer is:

asked by Blake on October 24, 2015
Physics
YOu are creating a transverse wave in a rope by shaking your hand from side to side. Without changing the distance that your hand moves, you begin to shake it slower and slower. What happens to the frequency? it decreases?? 2. For incomplete cancellation

asked by mark on October 17, 2008
Math
Which is equivalent to the inequality shown below? z/2 (less than equal too) – 15 a, x (x greater than equal too) – 7.5 b. x (less than or equal too)-7.5 c. x (greater than equal too) – 30 d. x (less than equal too) – 30 How do I solve this problem

asked by G on April 20, 2016

physics
Force, Work, and Rotation Question? Please Help!? You are sitting on a stool that is free to rotate without friction, and you are holding a 2.0 kg weight in each hand (ignore friction and all forces external to you + weights system). Also ignore your own

asked by igore on February 2, 2011
number theory
Let a and b be integers (not necessarily positive). Prove that (a^3 + 5b^3) not equal to 2016.

asked by Dip on October 6, 2016
STATISTICS
The area under a normal curve distribution is Equal to 100 almost equal to 1 equal to 1 equal to .5

asked by Jake on June 3, 2010
Chemistry(Please check)
1) choose the correct statement about the postulates of kinetic theory of gases. a) a sample of a gas consists of a small number of large particles close together. b) the movement of gas molecules is predictable, not random. c) when gas molecules collide,

asked by Hannah on January 10, 2012
Engineering
Determine the minimimum depth of a water reservoir that will provide a flow rate of 1200 gpm in a 4 inch diameter horizontal pipe that opens to the atmosphere You ought to consider Bernoulli’s equation for this, it is in your text. You can model it as

asked by matt on September 10, 2006
Astronomy
Why didn’t the Universe collapse into a black hole in the past when there was so much matter in such a small space? (a) Most of the particles in the early Universe were unstable and decayed before a black hole could form. By the time only stable

asked by qwerty on October 1, 2013
physics
Two identical small marbles A and B can be seen. A is at rest while B moves towards A at uniform velocity. The track is smooth towards left of P while it offers a resistance of 0.1 m/s2 towards its right. After some time, the marbles are seen at rest 25cms

asked by rahul on September 20, 2014
Physics
Two particles with the same mass and same initial speed collide and stick together and leave the collision with half of their initial speed, bound together as one particle. What was the angle between the initial momenta of the particles before the

asked by Abby on May 27, 2014
Physics
Two particles with the same mass and same initial speed collide and stick together and leave the collision with half of their initial speed, bound together as one particle. What was the angle between the initial momenta of the particles before the

asked by Jojn on May 26, 2014
Physics
Two particles with the same mass and same initial speed collide and stick together and leave the collision with half of their initial speed, bound together as one particle. What was the angle between the initial momenta of the particles before the

asked by Abby on May 27, 2014

STATISTIC
A two-tailed test is conducted at the 0.10 significance level. What is the P-value required to reject the null hypothesis? A. Greater than or equal to .010 B. Greater than or equal to 0.05 C. Less than or equal to 0.10 D. Less than or equal to 0.05 MY

asked by Vedrana on February 25, 2016
alg
the viewing window is defined by -3 is less than or equal to x is less than or equal to 7 and 10 is less than or equal to y is less than or equal to 30. give the approximate coordinates of a) the x-intercepts, b) the y-intercepts and c) the relative

asked by jerson on September 23, 2008
statistics
A two-tailed test is conducted at the 0.10 significance level. What is the P-value required to reject the null hypothesis? A. Greater than or equal to .010 B. Greater than or equal to 0.05 C. Less than or equal to 0.10 D. Less than or equal to 0.05 Is it

asked by jay on April 18, 2015
Physics
Ball A leaves the edge of a level table with speed Va and falls to the floor. At the instant ball A leaves the table edge, another identical ball, B, is released from rest at the height of the table top and also falls to the floor. It is observed that the

asked by Balthazar on October 5, 2010
Physics
Two particles, of mass m and mass nm, undergo a head-on, fully elastic collision. (Here n is just a unitless number.) Before colliding the particles approach one another with equal speed v. Snapshots of the particles before, during, and after the collision

asked by Andy on November 3, 2015

Categories
business plan writing services buy coursework college essay service write my dissertation for me

the density of solid cr is 7.15 g/cm3. how many atoms are present per cubic centimeter of cr?

The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centimeter of Cr?
As a solid, Cr adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Cr?

0 0 322
asked by Stephanie
Feb 19, 2013
dumb

0 1
posted by hhgyf
Nov 4, 2015
The density is 8.28e22

0 0
posted by Randi
Feb 2, 2016

Categories
buy coursework cheap dissertation writing services dissertation writing services do my assignment write my dissertation for me

what are powers of the us government that are named and listed in the constitution called

What are powers of the U.S. government that are named and listed in the Constitution called?

A.expressed powers

B.implied powers

C.inherent powers

D.prohibited powers

0 0 655
asked by Kidthelearner
Aug 25, 2016
http://www.ushistory.org/gov/3a.asp

0 0
👩‍🏫
Ms. Sue
Aug 25, 2016
thanks!

0 0
posted by Kidthelearner
Aug 25, 2016
You’re welcome.

1 0
👩‍🏫
Ms. Sue
Aug 25, 2016
so B?

1 0
posted by Kidthelearner
Aug 25, 2016

No,

0 0
👩‍🏫
Ms. Sue
Aug 25, 2016
ok…

0 0
posted by Kidthelearner
Aug 25, 2016
Is the answer c?

0 0
posted by Jordan
Sep 6, 2016
A is the correct answer

0 0
posted by Miss I Love You
Sep 14, 2016
Just took it.
1.A 2.A 3.C 4.B

!@#$%^&soutforharambe

2 0
posted by yesman
Sep 21, 2016

^^^ IS correct 100%^^^^

0 0
posted by Yesman
Sep 21, 2016
Thank you for the right answers yesman.

0 0
posted by Thanks!
Sep 23, 2016
Thanks for them answers☺️☺️☺️

0 0
posted by Happy
Sep 26, 2016
yesman is 100% right

0 0
posted by BS
Oct 2, 2016
Thanks yesman!

0 0
posted by Lol smiley face
Oct 5, 2016

yesman is actually a king TYSM

0 0
posted by Anonymous
Oct 10, 2016
yesman is right

0 0
posted by amy
Nov 30, 2016
all are right 100%

0 0
posted by mona
Feb 3, 2017
YESMAN is the fu**ing man

1 0
posted by Jorge
Apr 5, 2017
A
A
C
B
Thank me later

0 0
posted by Richard
Aug 28, 2017

Richard is 100% correct

0 0
posted by DessBlicky
Sep 15, 2017
They’re both right. Thanks.

0 0
posted by Padawan
Sep 21, 2017

  1. A
  2. A
  3. C
  4. B

i just took it

0 0
posted by yoongi
Sep 22, 2017
yoongi is right

0 0
posted by bbygrl
Sep 22, 2017
1.) A
2.) A
3.) C
4.) B

100% For connexus! 😛

0 0
posted by Fox Girl
Sep 26, 2017

I’ll read first

0 0
posted by SonikkuTheNerd
Sep 26, 2017
Thanks I got 100%

0 0
posted by SonikkuTheNerd
Sep 26, 2017
a
a
c
b
is correct

0 0
posted by bleh
Oct 20, 2017

  1. expressed powers
  2. Both national and state … share power
  3. tariff laws
  4. supremacy clause 0 0
    posted by Trinity
    Jan 19, 2018
    trinity is right, I got a 100% 0 0
    posted by seulgi
    Sep 7, 2018

All 100% correct, thank you!

0 0
posted by Odious
Sep 26, 2018

Categories
cheap dissertation writing services do my assignment phd dissertation writing services write my dissertation for me

nahco3(s)⇌naoh(s)+co2(g) calculate the value of the equilibrium constant.

Estimate the value of the equilibrium constant at 550 K for each of the following reactions.

1) 2CO(g) + O2(g) <==> 2CO2(g)

2) 2H2S(g) <==> 2H2(g) + S2(g)

Thanks in advance!

0 0 1,108
asked by Miguel
Jul 18, 2010
Calculate (from tables) delta Go for each reaction, then delta Go = -RT*lnK.

0 0
posted by DrBob222
Jul 18, 2010
Tried that…not right

0 0
posted by Miguel
Jul 18, 2010
If you didn’t use 8.314 for R, post your work.

0 0
posted by DrBob222
Jul 18, 2010
It’s apparently a different formula since the temperature is not the standard 298 K

Work for the first:

delta G is equal to -514.4 kJ

lnK = 514.4/(0.008314)(550)

lnK = 112.5

e^112.5 = 7.17*10^48 = k

  • which Mastering Chemistry says is wrong 0 0
    posted by Miguel
    Jul 18, 2010

I figured it out…

You use the formula

ln(k2/k1) = (delta H)/R * [(1/T1)-(1/T2)]

1) 5.24 * 10^44

2) 8.86 * 10^-13

0 1
posted by Miguel
Jul 18, 2010
Could you try and answer my other question?

(ht tp: //ww w. jiskha. com/ display. cgi?id= 1279495858)

take spaces out

0 0
posted by Miguel
Jul 18, 2010
I don’t see anything wrong with what you have done.

0 0
posted by DrBob222
Jul 18, 2010
where do you get the K1 from?

0 0
posted by kaylan
Nov 17, 2014
can you answer it for 545 K

0 0
posted by kaylan
Nov 17, 2014

Categories
buy dissertation online dissertation writing services do my assignment write my dissertation for me

what is the enthalpy for reaction 1 reversed? reaction 1 reversed: 2co2 + 3h2o→c2h5oh + 3o2

What is the enthalpy for reaction 1 reversed?
14,146 results
chemistry
What is the enthalpy for reaction 1 reversed? reaction 1 reversed: 2CO2+3H2O=C2H5OH+3O2 express the answer in kJ/mol

asked by Lilit*** on October 19, 2008
Chemistry due soon
What is enthalpy? A. Enthalpy is the kinetic energy of a system. B. Enthalpy is the heat involved in a reaction. C. Enthalpy is the temperature of a reaction. D. Enthalpy is the mass involved in a reaction. I think the answer is a or b

asked by Morgan on November 6, 2014
chemistry
Calculate the enthalpy of reaction for the combustion of ethene. Express the enthalpy of reaction calculated in question above as a molar enthalpy of reaction per mole of carbon dioxide.

asked by shyanne on January 8, 2013
Chemistry
Which of the following is the best definition of Hess’ Law? A. Heat is always released by the decomposition of 1 mole of a compound into its constitute elements. B. The enthalpy of a process is the difference between the enthalpy of the products and the

asked by Anonymous on February 20, 2008
Hess’ law
Which of the following is the best definition of Hess’ Law? A. Heat is always released by the decomposition of 1 mole of a compound into its constitute elements. B. Since enthalpy is a state function, it will be different if a reaction takes place in one

asked by christine on February 9, 2007

Chemistry
Which of the following is the best definition of Hess’ Law? A. Heat evolved in a given process can be expressed as the sum of the heats of several processes that, when added, yield the process of interest. B. The enthalpy of a process is the difference

asked by Jared on May 7, 2007
Chemistry
Which of the following is the best definition of Hess’ Law? A. Since enthalpy is a state function, it will be different if a reaction takes place in one step or a series of steps. B. Heat is always released by the decomposition of 1 mole of a compound into

asked by Anonymous on February 24, 2008
Chemistry
The enthalpy of formation for a substance corresponds to the enthalpy change for a reaction. Write the specific chemical reaction defining the enthalpy of formation of butane: Just checking to make sure this is correct: 4C + 5H2 —> C4H10

asked by AJ on March 26, 2017
Chemistry
Calculate the work involved if a reaction with an enthalpy change of -2418 kJ is carried out in a vessel with a mobile, frictionless piston. Other details: the reaction is H2(g) + 1/2Oxygen2(g) yields H2O(g) with enthalpy change of -241.8 kJ/mol. The

asked by Mark on November 22, 2008
Chemistry
The reaction between 0.045 g of calcium with an excess of water was carried out in an ice calorimeter as used in this lab. The volume of water in the calorimeter decreased by 0.18 mL during the reaction a) Write the equation for the reaction which occurs.

asked by Sean on June 3, 2009
Chemistry
Given the following equations: 2 H2 (g) + O2 (g)–> 2 H2O (l) deltaH = -571.6 kJ N2 (g) + O2 (g)–>2 NO (g) deltaH = +180.5 kJ N2 (g) + 3 H2 (g) —>2 NH3 (g) deltaH = -92.22 kJ Determine the enthalpy change (deltaH) for the following reaction: 2 NO (g) +

asked by Katherine on October 8, 2009
Chemistry practice
Using the form of energy diagram,make a concept map of the two different methods of calculation of reaction enthalpy(via the bond enthalpy and via the enthalpy of formation)

asked by Gift on July 31, 2011
Chemistry
When a chemist burns ammonia according to the reaction below she finds that the reaction releases heat. (It is exothermic.) 4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g) The enthalpy of the reaction DH = -1267 kJ. What is the enthalpy change (in kJ) when 7 grams of

asked by Devin on January 12, 2015
Chemistry
O3 + NO –> O2 + NO2 (all in gas state) Calculate the change in enthalpy for the reaction at room temp. using the following data ^Hf: O3 = 143 NO = 90 NO2 = 33 So, I have 143+90–> X + 33. I don’t know what the enthalpy of O2 is. I assume you simply

asked by Anonymous on February 18, 2008
chemistry-Thermochemistry (grade 12)
calculate enthalpy of H for the reaction N2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) + 2H2O(l) Enthalpy of H = -6.22.2 kJ H2(g) + (1/2)O2(g) -> H2O(l) enthalpy of H = -285.8 kJ/mol H2(g) + O2(g) -> H2O2(l) enthalpy of

asked by Rose Bud on February 16, 2012

chemistry-Thermochemistry (grade 12)
calculate enthalpy of H for the reaction N2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) + 2H2O(l) Enthalpy of H = -6.22.2 kJ H2(g) + (1/2)O2(g) -> H2O(l) enthalpy of H = -285.8 kJ/mol H2(g) + O2(g) -> H2O2(l) enthalpy of

asked by Rose Bud on February 16, 2012
chemistry
The reaction between 0.045 g of calcium with an excess of water was carried out in an ice calorimeter as used in this lab. The volume of water in the calorimeter decreased by 0.18 mL during the reaction a) Write the equation for the reaction which occurs.

asked by Anonymous on November 10, 2008
CHEMISTRY
1.Calculate the enthalpy change (ΔHºrxn) for the following reaction: (The enthalpy of formation of aqueous sodium hydroxide is -469.60 kJ/mol. The enthalpy of formation of liquid water is -285.8 kJ/mol.) 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g) 2.Do

asked by Cha-Ching on December 16, 2011
Chemistry – Enthalpy reactions
What is the reaction enthalpy for CaCO3(s) –> CaO(s) + CO2(g)? should i be using a enthalpy reaction table?

asked by Rose Bud on February 29, 2012
Chem
Change in enthalpy problem. Consider the reaction represented below. Referring to the data in the table below, calculate the standard enthalpy change for the reaction at 25 degrees C. O3(g)+NO(g)–>O2(g)+NO2(g) Standard enthalpy of formation in kJ/mol:

asked by Dan on November 19, 2007
Chemistry-College
S(rhombic)+O2(g)—>SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)—>SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)–>S(monoclinic) Our goal is to calculate the enthalpy change for

asked by Lucy on October 31, 2010
Chemistry- please help ASAP!!!! thank you
S(rhombic)+O2(g)—>SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)—>SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)–>S(monoclinic) Our goal is to calculate the enthalpy change for

asked by Annabelle on October 31, 2010
College (Enthalpy) – College
S(rhombic)+O2(g)—>SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)—>SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)–>S(monoclinic) Our goal is to calculate the enthalpy change for

asked by Lucy on October 31, 2010
chemistry
Calculate enthalpy change of reaction for the combustion of gaseous ethanol. C2H5OH + 3O2 >> CO2 + 3H2O. Using standard molar enthalpies of formation. C2H5OH -235.3 ( it’s negative sign) CO2 -393.5 H2O -241.8 (1) Calculate the enthalpy change of reaction

asked by Alex on April 20, 2010
help help help chemistry
why will no one answer this question? For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction

asked by john117 on February 27, 2012

chemsitry
c. Use the enthalpy diagram provided above and apply Hess’s Law to determine the standard enthalpy of formation for C12O36H20N12 (s) using the results from part (a) and the following values: The standard enthalpy of formation of gaseous carbon dioxide is

asked by Nora on October 23, 2010
chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than

asked by john117 on February 27, 2012
chemistry
The enthalpy change for the following reaction is -483.6 kJ: 2H2(g) + O2(g) = 2H2O(g) Therefore, the enthalpy change for the following reaction is _ kJ: 4H2(g) + 2O2(g) = 4H2O(g)

asked by danny on January 31, 2015
chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than

asked by bob on February 24, 2012
chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than

asked by bob on February 25, 2012
Chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than

asked by Mohamed on March 1, 2012
chemistry
2.9 The standard enthalpy of formation of the metallocene bis(benzene)chromium was measured in a calorimeter. It was found for the reaction Cr(C6H6)2(s) → Cr(s) + 2 C6H6(g) that . Find the corresponding reaction enthalpy and estimate the standard

asked by girlgirl on June 18, 2011
Chemistry
Nitrogen and oxygen can react directly with one anotheer to produce nitrogen dioxide according to N2(g) + 2O2(g) –> 2NO2(g) The reaction may also be imagined to take place by first producing nitrogen oxide N2(g) + O2(g) –> 2NO(g) which then produces NO2

asked by Sarah on November 12, 2015
Chemistry help
I am not to sure how to approach the problem… Hydrazine is used as a rocket fuel because its reaction with oxygen is extremely exothermic: N2H4(liquid) + O2(g) ==> N2(g) + 2H2O(liquid) ΔH(reaction) = -615 kJ mol-1 What is the enthalpy of this reaction

asked by Anonymous on May 11, 2014
Chemistry
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by Mark on October 26, 2015

CHEMISTRY!!!!
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by Mark on October 26, 2015
chemistry help!!!
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by Mark on October 25, 2015
chemistry help!
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by mark on October 26, 2015
chemistry
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by Mark on October 25, 2015
chemistry help!!!
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by Mark on October 25, 2015
CHEMISTRY!!!!
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by Mark on October 26, 2015
Chemistry
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the

asked by Mark on October 26, 2015
Chemistry
How is the enthalpy change for a reaction related to the enthalpy of the reactants and products? Is it that the enthalpy for the reactants and products equals the enthalpy change for the reaction?

asked by Anonymous on July 9, 2015
Chemistry
Please show me how to work! thanks When Snno2(s) is formed form the comustion of gray tin, the reaction enthalpy is -578.6 kJ, and when white tin is burned to form SnO2(s), the reaction enthalpy is -580.7 kJ. Calculate the reaction enthalpu for

asked by Sam on October 20, 2012
college chemistry
for the reaction at 298 K 2A+b —->C enthalpy=100 K/cal entropy= 0.050 kcal/k assuming enthalpy and entropy to be constant over the temperature range, at what temperature will the reaction become spontaneous? answer: T>2000K

asked by thomas on May 9, 2015

Chem
I was given a problem that my book did not explain how to do, so I attempted to figure it out myself. Let me know if my conclusion is fallacious. Given the reactions H2O(g) + CO(g) H2(g) + CO2(g), K= 1.6 FeO(s) + CO(g) Fe(s) + CO2(g), K= .67 Find K for the

asked by Chris on April 9, 2007
Chemistry
Calculate the work involved if a reaction with an enthalpy change of -2418 kJ is carried out in a vessel with a mobile, frictionless piston. Other details: the reaction is H2(g) + 1/2Oxygen2(g) yields H2O(g) with enthalpy change of -241.8 kJ/mol. The

asked by Mark on November 23, 2008
Chemistry-Dr.Bob
Since most chemical reactions are conducted in containers open to the armisphere, why is the energy transfer associated with a chemical reaction generally expressed as the change in enthalpy? Is it because the enthalpy of reaction measures the change in

asked by Sanaya on January 10, 2016
chemistry
give enthalpy profile diagrams to illustrate endothermic and exothermic reactions. include an explanation of cocepts such as enthalpy change, activation energy and catalysts.explain how the process of bond breakage and formation determine the enthalpy

asked by ABRAHAM on February 2, 2011
Chemistry
If delta H°rxn and delta S°rxn are both positive values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is a)enthalpy driven to the left. b)entropy driven to the right. c)entropy driven to the

asked by Alexis on April 20, 2014
AP Chem
Reaction 1: NaOH + HCL –> H20 + NaCl delta H of -100.332 kj/mol Reaction 2: NaOH + NH4Cl –> NH3 + H20 : delta H of 358.639 kj/mol Reaction 3: HCl + NH3 –> NH4Cl : delta H of -51.701 kj/mol Use your answers from question 2 above and Hess’s law to

asked by Serena on October 13, 2014
chemistry
is this the answer to B ) CH3CH2OH + 3O2 → 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are “burned” to water vapor andCO2. Write a combustion

asked by Mark on October 27, 2015
Chemistry
If the standard enthalpy of formation of PH3(g) is +5.4 kJ mol-1, calculate the reaction enthalpy for 2PH3(g)—>2P(s)+3H2(g)

asked by Sam on October 20, 2012
Chemistry – Enthalpy change and stoichiometry
N2 + O2 = 2NO enthalpy change = +180.6kJ c) what is the enthalpy change for the formation of one mole of nitrogen monoxide? d) What is the enthalpy change for the reaction of 1.000 * 10^2g of nitrogen with sufficient oxygen? I do not understand how to

asked by Farah on February 23, 2011
chemistry
State whether each of the following will increase,decrease or unchange when catalyst is added to the reaction and give an explanation for your answer please a) rate of reaction b)activation energy c)reaction enthalpy d)equilibrium of reaction

asked by Gift on July 9, 2011

Chemistry!
Calculate the work involved if a reaction with an enthalpy change of -2418 kJ is carried out in a vessel with a mobile, frictionless piston. Other details: the reaction is H2(g) + 1/2Oxygen2(g) yields H2O(g) with enthalpy change of -241.8 kJ/mol. The

asked by Elizabeth on November 23, 2008
Chemistry
Reposted: Use Hess’s law to calculate the enthalpy change for the reaction: 3C(s) + 3H2(g) yield C3H6(g) Given the following thermochemical equations: 2C3H6(g) + 9O2(g) yield 6CO2(g) + 6H2O(l) enthalpy change= -4116.0 kJ/mol C(s) + O2(g) yield CO2(g)

asked by Hailee on March 17, 2012
chemistry… HELP !!!!!!!
The average bond enthalpy for C__H is 413 kJ/mol. In other words, 413 kJ of energy is required to break a mole of CH into atoms: CH (g) —-> C(g) + H(g) delta H= 413 kJ Using this information, and enthalpy of C6H6=5535kJ, calculate the enthalpy change of

asked by sarah on November 18, 2012
chemistry
For the reaction shown below complete the following calculations. H2(g) + C2H4(g) –> C2H6(g) (a) Estimate the enthalpy of reaction using the bond energy values in Table 9.4. (b) Calculate the enthalpy of reaction, using standard enthalpies of formation.

asked by hannah on October 27, 2008
Chem please help
If the following reaction: NO(g) + 1/2O2(g) NO2(g) has the following enthalpy change: H° = -56 kJ/mol What is the enthalpy of the decomposition reaction of 2 moles of NO2? A. 112 kJ B. 56 kJ C. -56 kJ D. -112 kJ i think the answer is d

asked by Morgan on November 7, 2014
Chemistry due soon
If the following reaction: NO(g) + 1/2O2(g) NO2(g) has the following enthalpy change: H° = -56 kJ/mol What is the enthalpy of the decomposition reaction of 2 moles of NO2? A. 112 kJ B. 56 kJ C. -56 kJ D. -112 kJ i think the answer is d

asked by Morgan on November 7, 2014
Chemistry
Consider the isomerization equlibria of an alkene (C4H8) that co-exists as three isomers. (These 3 are in an equlibrium triangle) Reaction 1: cis-2-butene ⇔ trans-2-butene Reaction 2: cis-2-butene ⇔ 2-methylpropene Reaction 3: trans-2-butene ⇔

asked by Gleb on March 3, 2013
Chemistry
Calculate enthalpy of reaction C2H4 + H2 gives C2H6.enthalpy of combustion of ethene, H2,and ethane are -1410,-286,-15.60kj/mol respectively

asked by Shaika on November 7, 2016
gen Chem
I’ve attempted this problem but not sure if i’m on the right track. Use the enthalpy diagram provided above and apply Hess’s Law to determine the standard enthalpy of formation for C12O36H20N12 (s) using the results from part (a) and the following

asked by Vince on October 26, 2010
chemistry
How to calculate enthalpy change of the following reaction? : S + 2h2o >>> so2 + 2h2 given: s+o2 >>> so2 – enthalpy change = -296.8 kJ h2 + 1/2o2 >> h20 enthalpy change= -285.8kj I was trying to solve it myself but i got confused.. i know i have to change

asked by olexandra on April 19, 2010

Chemistry VERY DIFFICULT
Imagine you have been given a series of materials to react together and the following enthalpy change data has been recorded. Explain the terms exothermic and endothermic, and identify which of the following are exothermic and endothermic reactions. Ensure

asked by Jack on January 10, 2017
Chemistry
I’m trying to calculate the enthalpy of the reaction Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2 (g) however I cannot find the enthalpy of the compound MgCl2 (aq) and I cannot calculate the total enthalpy without it

asked by Kirstie on March 27, 2011
Chemistry
The following reaction has a standard enthalpy of reaction of -146.0 kJ/mol: Cu2O(s) + 1/2 O2(g) -> 2CuO(s) The standard enthalpy of formation of Cu2O(s) is -168.6 kJ/mol. What is the standard enthalpy of formation of CuO(s)?

asked by James on March 11, 2011
Chemistry

  1. The delta Hf of an element in its standard state is defined to be a) 0 kJ/mol b) 10 kJ/mol c) -10 kJ/mol d) greater than 0 kJ/mol e) a unique value for each element I am assuming its a? 2. Which of the following statements are true? I) The reaction

asked by Bobby on July 21, 2010
chemistry
A 114g sample of sucrose undergoes incomplete combustion according to the reaction C12H22011 + 5O2 —> 4C + 6CO + 2CO2 + 11H2O using the chart of enthalpies of formation determine the enthalpy released by the sample i think that it is a simple enthalpy

asked by rick on July 25, 2010
Chemistry Dr. BOB
I don’t get it!! In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for ethanol. I need help with

asked by Mark on October 27, 2015
chemistry BOB
is this the answer to B ) CH3CH2OH + 3O2 → 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are “burned” to water vapor andCO2. Write a combustion

asked by Mark on October 27, 2015
general chemistry
A sample consisting of 0.025 mol of a solid compound is placed inside a metal cylinder. The cylinder was immersed in a water bath consisting of 10.00 kg of water at an original temperature of 25.00 °C. When the compound decomposes, the temperature of the

asked by Nora on October 23, 2010
Chemistry – Science (Dr. Bob222)
Hydrazine is used as a rocket fuel because its reaction with oxygen is extremely exothermic: N2H4(liquid) + O2(g)  N2(g) + 2H2O(liquid) ΔH(reaction) = -615 kJ mol-1 What is the enthalpy of this reaction if water were produced in the gaseous rather than

asked by Ana on May 8, 2014
Chemistry
Consider the following reaction: H2(g) + I2(s) —> 2HI(g) TriangleH = 51.9 kj (enthalpy) Calculate the standard enthalpies of reaction for the following reaction: 6HI(g) —> 3H2(g) + 3I2(s) Thanks!

asked by Sandy on April 28, 2012

chemistry
If you need to multiply the following reaction by 2 to be an intermediate reaction in a Hess’s law problem, what would be the final value for the enthalpy of reaction you use for this intermediate reaction? C2H4 + 3 O2 2 CO2 + 2 H2O, H = -1410 kJ

asked by Anonymous on November 24, 2014
Chemistry
What is the enthalpy change for the first reaction? Fe2O3(s) → 2Fe(s) + 3/2O2(g) ΔH = 4Fe(s) + 3O2(g) → 2Fe2O3 (s) ΔH = -1,652 kJ I think I’m supposed to rearrange the equation and double everything but enthalpy isn’t my strong suit

asked by Hahn on October 7, 2014
Chemistry
Assuming the dissolution of borax in water is a spontaneous reaction, do you expect the change in enthalpy to be positive or negative or are both signs possible? Explain your answer A. Neither, enthalpy does not change, the positive entropy for the

asked by Linda on May 7, 2007
Chemistry
Find the enthalpy for : 4Fe + 3O2 = 2Fe2O3 I got the following informations: Fe + 3H2O = Fe(OH)3 + 3/2H2 – Enthalpy is 160.9 kj H2 + 1/2O2 = H2O – Enthalpy is -285.8 kj Fe2O3 + 3H2O = 2Fe(OH)3 – Enthalpy is 288.6 I try using Hess Law but cannot solve it.

asked by Shadow on May 13, 2013
Chemistry
The lab we are doing is: Determining the ENTHALPY of a Chemical Reaction. There are three reactions. Reaction 1: NaOH + HCl, Reaction 2: NaOH + NH4Cl, and Reaction 3: HCl + NH3. I found the max temp, initial temp, and temp change of each reaction. Can you

asked by Rina on October 29, 2017
chemistry DR BOB
is this the answer to B ) C2H5OH(liq)+ 3O2(g) –> 2CO2(g) +3H2O(liq) In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are “burned” to water vapor andCO2. Write a

asked by Mark on October 27, 2015
chemistry DR BOB!
is this the answer to B ) C2H5OH(liq)+ 3O2(g) –> 2CO2(g) +3H2O(liq) In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are “burned” to water vapor andCO2. Write a

asked by Mark on October 27, 2015
CHM1045
NH4NO3(s) right arrow NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction, 1.21 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid

asked by Philip Golden on March 30, 2013
chemistry
Find the false statement(s) about the thermochemistry experiment in which nitric acid is reacted with sodium hydroxide, and the enthalpy of the reaction is measured using an ice calorimeter. i. Regardless of which strong acid and strong base are used for

asked by Anonymous on November 16, 2008
chemistry Dr BOB
is this right? C2H6O + 3O2 = 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are “burned” to water vapor andCO2. Write a combustion reaction for

asked by Mark on October 27, 2015

chem please help drbob222
In the roasting of zinc ore, the total enthalpy for the reactants is -412.0 kJ and the total enthalpy for the products is -1294.54 kJ. What is the enthalpy for the roasting reaction? A. 882.54 kJ B. -1706.54 kJ C. 1706.54 kJ D. -882.54 kJ I think the

asked by Morgan on November 25, 2014
Thermochemistry
I’m confused about the difference between the q in q=mc(Tf-Ti) and (Delta)H, or enthalpy. What exactly does enthalpy mean and how is that different than q? (I’m also confused about what Gibbs Free Energy actually means; I know that if it’s negative, the

asked by Kevin on December 2, 2008
chemistry
a) Describe how to determine if a reaction will be thermodynamically favorable. b) Describe what happens to the Gibbs Free Energy term when a chemical reaction is reversed. c) Describe how coupling reactions are used to drive an unfavorable chemical

asked by Morgan on March 12, 2015
CHEMISTRY
AT 25 DEGREES CELSIUS THE STANDARD ENTHALPY OF COMBUSTION OF GASEOUS PROPANE IS -2219.0 KJ PER MOLE OF PROPANE AND THER STANDARD ENTHALPY OF GASEOUS PORPYLENE IS -2058.3 KJ PER MOLE OF P[ROPYLENE. wHAT IS THE STANDARD ENTHALPY CHANGE FOR THE FOLLOWING

asked by Anonymous on July 23, 2011
Chemisty
I need a recap of how to do the question below. I just need the basic guidelines: The enthalpy change for the reaction 2H2(g)+O2 > 2H2O is -571.6kJ. Determine the enthalpy change for the decomposition of 24.0g H2O.

asked by Todd on June 26, 2015
chemistry kinetics
Statement-I : For an endothermic reaction, the activation energy is less than the change in enthalpy. Statement-II: Activation energy of a reaction, at a given temperature can never be greater than its change in enthalpy are these statements true? give

asked by swa on May 24, 2012
chemistry
NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid

asked by DeeDee on November 16, 2012
Chemistry
In a thermochemistry experiment the reaction of 0.0857 g of an unknown metal and an excess of 4.0 M HCl resulted in a 0.210 mL decrease in the volume of an ice/water mixture. Calculate the enthalpy of this reaction per 1 g of metal reacted. Needed data:

asked by Raj on December 1, 2007
Chemistry
If calcium carbide has a standard enthalpy of formation of -59.8 kJ/mol and acetylene has a standard enthalpy of formation of 226.73 kJ/mol, what is the standard enthalpy change for the reaction?

asked by Kelly on February 20, 2013
chemistry
2C2H2(g) + 5O2(g)→4CO2(g) + 2H2O(g) a. Determine the enthalpy change for the reaction. ΔH = (4(-393.5)+ 2(-241.8)) – (2(227) + 5(0)) The enthalpy change is -2511.6. b. Determine the entropy change for the reaction. ΔS = (4(213.7)+ 2(188.7)) –

asked by Morgan on January 31, 2015

Chemistry
I know I posted this question before, but can you clarify it?? MY QUESTION IS AFTER YOU SWITCHED THE DELTA H1 THE CHANGE IN THE ENTHALPY IS NEGATIVE…. BUT THAT DOES NOT MAKE SENSE BECAUSE THE CHANGE IN ENTHALPY OF THE ORIGINAL DELTA H1 IS

asked by Anonymous on November 14, 2013
CHEMISTRY
I know I posted this question before, but can you clarify it?? MY QUESTION IS AFTER YOU SWITCHED THE DELTA H1 THE CHANGE IN THE ENTHALPY IS NEGATIVE…. BUT THAT DOES NOT MAKE SENSE BECAUSE THE CHANGE IN ENTHALPY OF THE ORIGINAL DELTA H1 IS

asked by Anonymous on November 14, 2013
chemistry, please help
2NO2(g)–> 2NO(g) + O2(g) , H=+114.2kJ (Note: H, S, G all have a degree sign next to them) NO: H(enthalpy)=90.3kJ/mol, S(entropy)=210.7J/mol*K, G(gibbs energy)=86.6 O2: H(enthalpy)=0, S(entropy)=?, G(gibbs energy)=0 kJ/mol NO2: H(enthalpy)=33.2, S=239.9,

asked by apoorva on February 4, 2008
Science
The enthalpy change for the reaction 2 H2 + O2 > 2 H20 is -571.6 kJ. Determine the enthalpy change for the decomposition of 24.0g H2O. My Process -571.6 is the enthalpy of 2 mols of H2O. So the enthalpy of 1 mol of H2O will be -285.8. Since it’s

asked by Mike on July 9, 2015
Chemistry
From your experience, predict which of the following reactions are spontaneous. a) Zn(s) + 2H+(aq)–> Zn+2(aq) + H2 (g) b) CaCO3(s) + 2H2O(l) –> Ca(OH)2(s) + H2CO3(aq) c) CH4(g) + O2(g) –> CO2(g) + 2H2O(g) d) Ag+(aq) + Cl-(aq) –> AgCl (s) Our book

asked by Chris on February 14, 2007

Categories
buy coursework custom dissertation writing do my assignment write my dissertation for me

calculate δg∘rxn at 298 k for the following reaction:i2(g)+cl2(g)⇌2icl(g),kp=81.9

Consider the following reaction:
I2(g) + Cl2(g) 2ICl(g) o

Kp = 81.9 at 25 C.
Calculate ∆Grxn for the reaction at 25 C under each of the following conditions:
a Standard conditions.
b At equilibrium.
c PICl = 2.55 atm; PI2 = 0.325 atm; PCl2 = 0.221 atm.

0 0 697
asked by Melanie
Apr 18, 2013
a.
dG = -RTlnK

b.
dG = 0 at equlibrium

c.
Are these equilibrium pressures, initial pressures, or some other point?

0 0
posted by DrBob222
Apr 18, 2013
432

0 0
posted by kjf,hjn
May 4, 2017

Categories
custom dissertation writing dissertation help phd dissertation writing services write my assignment write my dissertation for me

humans developed antibiotics to fight bacterial infections

Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this?

a. The antibiotic mutated the bacteria, which allowed resistance to develop.
b. After being exposed to the antibiotic, individual bacteria acquired the ability to resist the antibiotic.
c. Genetic variation in bacteria made it possible for some individuals to have resistance to the antibiotic, survive and reproduce.*
d. The antibiotic mutated to an ineffective form

Thanks so much 🙂

1 0 2,118
asked by Anonymous
May 12, 2015
Ok anyway thanks:)

0 1
posted by Anonymous
May 12, 2015
After being exposed to the antibiotic, individual bacteria acquired the ability to resist the antibiotic.

0 0
posted by sciencewhiz
Mar 28, 2019

Categories
buy coursework cheap dissertation writing services college essay service do my assignment write my dissertation for me

enter the solubility-product expression for al(oh)3(s).

Enter the solubility-product expression for Al(OH)3(s)
19,701 results
chemistry
Write the balanced equation and solubility product expression for the solubility equillibrium of Mn3(PO4)2: Ksp expression?

asked by Karly on November 29, 2010
Chem
if salt has the solubility product expression Ksp={Br3+}2{S2-}3 what is the equilibrium equation for the solubility?

asked by Tammy on December 3, 2011
Chemistry
Write the balanced equation and solubility product expression for the solubility equilibrium of Mn3(PO4)2: i thought the answer was Mn3(PO4)2 (s) = Mn^2+(aq) + (PO4)2 ^3- (aq) but that’s not right. then for the Ksp expression i thought it was [Mn^2+]

asked by Jake on December 1, 2010
Chemistry
Write the balanced equation and solubility product expression for the solubility equilibrium of Mn3(PO4)2: i thought the answer was Mn3(PO4)2 (s) = Mn^2+(aq) + (PO4)2 ^3- (aq) but that’s not right. then for the Ksp expression i thought it was [Mn^2+]

asked by Jake on November 30, 2010
Chemistry
A 100 L reaction container is charged with 0.724 mol of NOBr, which decomposes at a certain temperature** (say between 100 and 150 oC) according to the following reaction: NOBr(g) ↔ NO(g) + 0.5Br2(g) At equilibrium the bromine concentration is 1.82×10-3

asked by Anonymous on February 20, 2013

Beryl
Pb3(ASO4)2.the solubility product expression

asked by Gift on November 24, 2014
Solubility
What is the solubility product of CaF2 if 0.1 M Ca2+ and 0.02 M F- are in solution just before precipitation occurs? 4.0 × 10^-5 The solubility product cannot be determined. 1.6 × 10^-4 2.0 × 10^-3

asked by Esmerelda on April 18, 2018
chemistry
the solubility product expression for BiS3 is Ksp= a.[Bi2^3][S3^2-]. b. [Bi^3+][S^2-]. c. [Bi^3+]^2 [S^2-]^3 d. none of these

asked by Christina on January 4, 2010
CHEMISTRY
Find the expression for the solubility product of silver oxalate Ag2C2O4).

asked by Anonymous on December 6, 2017
CHEMISTRY
2) Find the expression for the solubility product of silver oxalate Ag2C2O4).

asked by Anonymous on December 6, 2017
Chemistry(Please help)
The solubility product expression for mercury(I) iodide, Hg2I2 is Ksp = ? My answer is [Hg2^2+^][2I^-^]^2^ Would you agree?

asked by Hannah on April 8, 2012
Chemistry(Please check answer)
The solubility product expression for mercury(I) iodide, Hg2I2 is Ksp = ? My answer is [Hg2^2+^][2I^-^]^2^ Would you agree?

asked by Hannah on April 8, 2012
Chemistry
Consider a saturated solution of calcium fluoride in 0.086 M potassium nitrate. Complete the following tasks, and then answer the question. a) Write the chemical equation corresponding to Ksp. b) Write the defining expression for the thermodynamic

asked by Ashley on October 7, 2012
Chemistry
The solubility of Chromium (II) Hydroxide is .0035g/100mL – Calculate the solubility product of Chromium (II) Hydroxide. I know that we have to find Ksp. but i do not understand how to make the Ksp equation to calculate the solubility product, if it is

asked by cool kids on April 27, 2017
MathematicalModels
Consider the Black-Scholes-Merton model for two stocks: dS1(t)=0.1S1(t)dt+0.2S1(t)dW1(t) dS2(t)=0.05S2(t)dt+0.1S2(t)dW2(t) Suppose the correlation between W1 and W2 is 0.4. Consider the dynamics of the ratio S1/S2, where A,B,C,D,F,G,I,J,K,L are constants

asked by RVE on May 18, 2015

Chemistry
Describe the process by which adding potassium hydroxide to a saturated aluminum hydroxide solution reduces the concentration of aluminum ions. Write the solubility equilibrium equation and solubility product constant expression for a saturated aqueous

asked by Alex on May 18, 2010
chemistry(Acid&Base)
Calculate the solubility product of calcium hydroxide if the solubility of Ca(OH)2(s) in water at 25◦C is 0.011 M. Choices: 1. 1.1 × 10−5 2. 5.3 × 10−6 3. 2.7 × 10−6 4. 1.5 × 10−8 5. 1.2 × 10−4

asked by vivian on May 12, 2011
Chemistry
The solubility product of Fe(OH)3 is 8.0×10^-40. Calculate its solubility at 35 degrees Celsius in a saturated solution.

asked by Suha on January 2, 2011
Chemistry
the solubility product of barium sulphate at 18°c is 1.5×10^-9.its solubility at same temperature is

asked by Anonymous on September 30, 2017
Chemistry
The solubility of Ag2S is 2.48×10^-15 mol/dm3. Calculate its solubility product.

asked by Suha on January 2, 2011
AP Chemistry
Calculate the solubility product constant for calcium carbonate, given that it has a solubility of 5.3×10^7 g/L of water.

asked by Gabriella on January 8, 2014
Chemistry
what is the molar solubility of lead sulfate in 1.0 X 10^-3 M Na2SO4? The Solubility Product Constant PbSO4 Ksp= 1.8 x 10^-8 The Ksp expression is: Na2SO4 = [2Na][SO4^-2] [2Na]=2x [SO4^-2]=x Ksp= 1.8 x 10^-8 = (x)(2x) Ksp= 1.8 x 10^-8 /4x^3 1.8 x 10^-8/4 =

asked by LT on April 14, 2008
chemistry
(a) The solubility of bismuth iodide in water is 9.091 x 10-3 M. Calculate the value of the solubility product. The dissolution products are and

asked by mike on January 11, 2013
science
The solubility of bismuth iodide in water is 4.291 x 10-3 M. Calculate the value of the solubility product. The dissolution products are and

asked by minis on January 12, 2013
CHEMISTRY
Aluminum hydroxide reacts with an excess of hydroxide ions to form the complex ion Al(OH)4- a)Write an equation for this reaction b) Calculate K. c) Determine the solubility of Al(OH)3 in (mol/L) at pH 12.0 My equation was Al(OH)3 + OH- –> Al(OH)4- but

asked by Jessica on April 11, 2007

chemistry
the solubility of the fictitious compound administratium fluoride in water is 3.091e-4.calculate the value of solubility product ksp

asked by himani. on May 7, 2013
chemistry
the solubility of Mg(OH)2 at 25C is4.6×10^-3 g/100cm3? what is the solubility product of M g(OH)2?

asked by ali on May 12, 2016
Chemistry
Question One Lead chloride dissolves in water according to PbCl2(s) Pb^2+ + 2Cl^- (aq) The solubility in pure water has been measured to be 4.44g . L^-1 . Calculate the solubility product of lead chloride in pure water. Your answer should be in units of

asked by Odesa on December 11, 2012
Chemistry
The solubility of bismuth iodide (BiI3) in water is 8.491 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

asked by yolo on January 12, 2013
chemistry
The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

asked by anita on December 17, 2012
chemistry
The solubility of bismuth iodide (BiI3) in water is 9.491 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

asked by julia on January 12, 2013
chemistry
he solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

asked by danhil on December 17, 2012
Chemistry
The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

asked by Ankur on December 16, 2012
chemistry
The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

asked by adex on April 27, 2013
science..chemistry
given the solubility product;Ksp,of calcium hydroxide is 0.0000064M,caculate its solubility at this temperature in i.water ii.0.1M calciumchloride solution

asked by kange on April 26, 2012

Chemistry
The solubility of the fictitious compound, administratium fluoride ( AdF3 ) in water is 3.091×10^-4M . Calculate the value of the solubility product Ksp .

asked by Odesa on December 11, 2012
Chemistry
The solubility of bismuth iodide (BiI3) in water is 10.291 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

asked by T on January 11, 2013
Chemistry
The solubility of bismuth iodide (BiI3) in water is 3.691 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

asked by kaken on January 11, 2013
chemistry
) The solubility of bismuth iodide (BiI3) in water is 5.891 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

asked by ani on January 11, 2013
Chemistry
The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

asked by Ankur on December 16, 2012
chemistry
calculate the molar solubility of barium fluoride in water at 25 degrees C. The solubility product constant for BaF2 at this temperature is 1.0×10^-6

asked by roshan on March 21, 2011
chem can u check answer please
the solubility of silver sulfate in water is 0.223%(w/v) at 35 degrees celsius.calculate the solubility product of this salt at this temp. I got 1.46 X 10^-6 M is this right please thanks Andy

asked by Andy on May 23, 2010
Chemistry
The solubility of Agcl with solubility product 1.6 × 10^-10 in 0.1 M Nacl solution will be ?

asked by Ananthi on April 30, 2017
chem
The solubility product of silver sulfate is 1.6* 10^-5. What is the molar solubility of this compound? Ksp= [Ag]^2[So4^2-] 1.6*10^-5 = x^3 x= .0252 but the answer in my book is (16/4)^1/3 *10^-2 which equals to 0.158

asked by Sara on August 10, 2009
Chemistry
Find the Concentration of CrO4^2- in 0.0033M Ba(NO3)2 saturated with BaCrO4. Include activity coefficients in your solubility-product expression. Ksp of BaCrO4 = 1.17 x 10^-10 I have no idea what to do to solve this 🙁

asked by Sam on February 4, 2013

chem
Iron (III) sulfate is a yellow compound that is used as a coagulant in water treatment. write a balance chemical equation and a solubility product expression for its dissolution in water. Please Help

asked by Anonymous on April 18, 2012
Chemistry !
The solubility of Mn(OH)2 is 3.04 x 10^-4 gram per 100 ml of solution . A) write the balanced chem equation for Mn(OH)2 in aqueous solution B) calculate the molar solubility of Mn(OH)2 at 25 degrees celcius C) calculate the value of the solubility product

asked by Vee on April 1, 2014
High school AP chem
The solubility of Mn(OH)2 is 3.04 x 10^-4 gram per 100 ml of solution . A) write the balanced chem equation for Mn(OH)2 in aqueous solution B) calculate the molar solubility of Mn(OH)2 at 25 degrees celcius C) calculate the value of the solubility product

asked by Chem review question on April 1, 2014
Chem
The solubility of Mn(OH)2 is 3.04 x 10^-4 gram per 100 ml of solution . A) write the balanced chem equation for Mn(OH)2 in aqueous solution B) calculate the molar solubility of Mn(OH)2 at 25 degrees celcius C) calculate the value of the solubility product

asked by Bee on April 1, 2014
Chemistry
What mass of silver chromate can be dissolved in 125 mL of water? How do I find this out? Ag2CrO4 is not very soluble. Look up the solubility product and calculate the solubility from Ksp. Wow, thank you so much. I realised that I wrote my chemical formula

asked by HelpMe on October 29, 2006
medicinal chemistry
the solubility product of PbSO4 at 298K is 1.6×10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in 0.10mol dm^-3 sulphuric acid.Thanks!

asked by jane on May 28, 2012
chemistry
what is the solubility of barium sulfate in a solution containing 0.050 M sodium selfate? The Ksp value for barium sulfate is 1.1E-10. An insoluble salt with formula MX3 has a solubility product constant written in terms of solubility,s, in the form a)

asked by Sarah (C) on April 23, 2011
AP Chemistry
The ionic substance T3U2 ionizes to form T2+ and U3− ions. The solubility of T3U2 is 4.07×10−20 mol/L. What is the value of the solubility-product constant?

asked by Gabriella on January 9, 2014
medicinal chemistry
the solubility product of PbSO4 at 298K is 1.6×10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in pure water

asked by jane on May 28, 2012
analytical chemistry
what is the solubility of PbI2in g/L ,if the solubility product is 7.1 ?

asked by Uzma Jan on August 1, 2016

Chemistry
What is the solubility (in g/L) of PbCl2 at 25 degree celsius? The solubility product of PbCl2 at 25 degrees celcius is 1.6×10-5.

asked by Patrick on March 17, 2013
Chemistry(Please check)
What is molar solubility of Al(OH)3 at 25 degrees C given the solubility product Ksp = 5.0e-33? I set this up as Al^3+ + 3OH^- Ksp=[Al^3+][OH^-]^3 5.0e-33 = (x)(3x)^3 Before I go any further did I do this correctly?

asked by Hannah on April 10, 2012
Chemistry
C2D3 has a solubility product constant of 9.14×10−9. What is the molar solubility of C2D3? Express your answer with the appropriate units.

asked by Damon on July 28, 2016
Chem
(a) The molar solubility of Ag2CrO4(s) at 35°C is 1.3 10-4 mol/L. Calculate Ksp. (b) If 0.0490 g of AgIO3 dissolves per liter of solution, calculate the solubility-product constant. (c) Using the appropriate Ksp value from Appendix D, calculate the

asked by Rebekah on April 27, 2011
chemistry
Write balanced equations and solubility product expressions for the solubility equlibria of the following compounds: a. CuBr b. ZnC2O4 c. Ag2CrO4 d. Hg2Cl2 e. AuCl3 f. Mn3(po4)2 can you give me some examples using the compounds given?

asked by Jin on July 19, 2010
Chemistry
The solubility product of PbCl2 at 25 degrees celcius is 1.6×10-5 mol3.dm-9. What is the solubility of PbCl2?

asked by Suha on January 2, 2011
chemistry
What happens to the solubility of oxygen gas (O2) in water in each situation? a. The pressure of O2 over the solution is decreased. solubility decreases solubility remains the same solubility increases b. The temperature is decreased. solubility remains

asked by krystal on February 21, 2012
Chemistry
The solubility of insoluble substances changes depending on the nature of the solution. Below are two solutions in which Cu(OH)2 is dissolved; in each case, the solubility of Cu(OH)2 in those solutions is not the same as it is in pure water. (a) For each

asked by Henry on February 19, 2015
Chemistry – Solubility Equilibria
If the solubility of CaCO_3 in water at 25°C is 5.84 ✕ 10^−3 g/L, calculate the solubility-product constant (Ksp) of CaCO_3, assuming complete dissociation of the CaCO_3 that has dissolved.

asked by Jamie on March 28, 2018
chemistry
The solubility of MnS was found to be 0.000963 g per 700 mL of water. Calculate the solubility product constant (Ksp) for MnS. MnS (s)=Mn2+ (aq) + S2- (aq)

asked by andy on May 13, 2010

Chem
The solubility of calcium sulfate is1.90g of caso4 per liter of aquences solution at 25c. The formula weight of caso4 is 136.11 calculate the solubility product of caso4.

asked by Kim on November 17, 2015
chem
The solubility product of nickel (II) hydroxide at 25°C is 1.6 x 10-16. a) Calculate the molar solubility of nickel (II) hydroxide in pure water at 25°C. b) Calculate the molar solubility of nickel (II) hydroxide in 0.100 M sodium hydroxide. This is a

asked by Ilene on May 2, 2007
chem
The molar solubility of MgF2 at 25°C is 1.2 10-3 mol/L. Calculate Ksp. i got the euqation ksp= [F-]^2[Mg]2+ and plugged in 1.2e-3 and got 1.7e-9 but it is wrong. also this question If 0.0968 g of CaF2 dissolves per liter of solution, calculate the

asked by hannah on March 26, 2013
Chemistry
Tooth enamel is made up of hydroxyapatite, Ca_10(PO_4)_6(OH)_2 or the empirical formula, Ca_5(PO_4)_3(OH). Use the empirical formula for all calculations because stoichiometry plays two significant roles. A. Print the balanced chemical equation for the

asked by John on April 7, 2011
Calculus
What is the simplified average rate of change between x = 2 and x = 2 + h for the function: (Enter your expression as you would enter an equation in Winplot) a. ƒ(x) = x2? ƒ(x) = f(x)=1x ?

asked by Anonymous on November 5, 2018
chemistry
1.If its molar solubility is designated by “x”, then which of the following expressions best represents the solubility product for the substance Ag2SO4? a) x2 b) 27×4 c) 4×3 d) 108×5 e) 3×4 2. Consider the equilibrium, 4HCl(g) + O2(g) 2H2O(g) +

asked by tt on August 3, 2011
CHEMISTRY
THE SOLUBILITY PRODUCT CONSTANT FOR BaSO4 AT 298K IS 1.1X10-1O POWER. CALCULATE THE SOLUBILITY OF BaSO4 IN MOL\L AT 298K

asked by JASMIN on April 7, 2013
chemistry
a liter of a solution saturated at 25C with CaC2O4 is evaporated to dryness giving a 0.0061 gm residue of CaC2O4. Calculate the concentrations of the ions, and the molar solubility and the solubility product constant for this salt at 25C. Show the balanced

asked by Erin on June 10, 2012
Chemistry
Zn(OH)2 was saturated in a solution of sodium hydroxide. The following equilibra exist under these conditions Zn(OH)2 -> Zn2+ +2OH- Ksp Zn2+ +OH- -> Zn(OH)+ K1 Zn(OH)- + OH- -> Zn(OH)2 K2 Zn(OH)2 + OH- -> Zn(OH)3- K3 Zn(OH)3- +OH- -> Zn(OH)42- K4 a) Sum of

asked by Troy on March 24, 2015
please help Chemistry
Zn(OH)2 was saturated in a solution of sodium hydroxide. The following equilibra exist under these conditions Zn(OH)2 -> Zn2+ +2OH- Ksp Zn2+ +OH- -> Zn(OH)+ K1 Zn(OH)- + OH- -> Zn(OH)2 K2 Zn(OH)2 + OH- -> Zn(OH)3- K3 Zn(OH)3- +OH- -> Zn(OH)42- K4 a) Sum of

asked by george on March 26, 2015

chemistry
Zn(OH)2 was saturated in a solution of sodium hydroxide. The following equilibra exist under these conditions Zn(OH)2 -> Zn2+ +2OH- Ksp Zn2+ +OH- -> Zn(OH)+ K1 Zn(OH)- + OH- -> Zn(OH)2 K2 Zn(OH)2 + OH- -> Zn(OH)3- K3 Zn(OH)3- +OH- -> Zn(OH)42- K4 a) Sum of

asked by george on March 26, 2015
Chemistry
(a) The solubility of bismuth iodide (BiI3) in water is 4.891 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi^3+ (aq) and I^- (aq). (b) Do you expect the solubility of (BiI3) in 0.1 M NaCL (aq) to be equal to,

asked by Chemgam on January 11, 2013
MTH HELP
5)Which property is illustrated by the following statement ? 3z+4=4+3z A)Associative property of addition B)Commutative property of multiplication C)Inverse property of multiplication D)commutative property of addition 12) What is the algebraic expression

asked by ASTROLATER on September 22, 2016
Chemistry — to Dr.Bob I need your help!!!
The solubility of product constant (ksp) for the dissolution of Pb3(Aso4)2 as represented by the chemical equation is 4.0 x 10^-36 Pb3(AsO4)2 (s)—>3Pb 2+ (aq) + 2 AsO4^3 (aq) Calculate the molar solubility (mol/L) of Pb3(AsO4)2 in water

asked by Amy on May 6, 2008
science
In an experiment to determine the solubility of lead chloride (PbCl2), 5.6g of (NH4)2SO4 was added to a 250ml solution containing an unknown amount of dissolved lead chloride (PbCl2) resulting in the formation of Lead sulfate precipitate. The mass of the

asked by nelo on July 27, 2014
chemistry
the solubility of BaF2 is 6.29×10^-3M and the solubility of barium fluoride in 0.15M NaF is 4.4×10^-5M. Compare the solubility and explain?

asked by roshan on March 22, 2011
Algebra
“If possible, completely factor the expression. (If the expression is not factorable, enter NF.) x2 − 6x − 7”

asked by Lee on November 10, 2014
Chemestry
The solubility product of copper(II) iodate, Cu(IO3)2, is 4 x 10-9 mol3 dm-9 at 25 °C. What is the solubility of copper(II) iodate in g dm-3? A 1.85 × 10-2 B 4.14 × 10-1 C 5.21 × 10-1 D 6.56 × 10

asked by John on June 10, 2011
Algebra
Determine the value or values of d that complete the square for the expression. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.) (a) x^2 + 7x + d d = b) x^2 − 18x + d d = (c) x^2 + dx + 64 d = (d) x^2 + dx +

asked by Ashton on September 13, 2014
chemistry help
Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a

asked by emma on September 10, 2016

chemistry
Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a

asked by emma on September 10, 2016
Chemistry
Question One The fictitious compound, pandemonium fluoride ( PnF2 ) has a Ksp value in water of 3.091×10^-9 M^3 at room temperature. Calculate the solubility of PnF2 in water. Express your answer in units of molarity. Question Two How would you expect the

asked by Odesa on December 11, 2012
Math
Using the expression 56xy + 5 -6x + y/20,find the following: a. Find two sums. b. find the terms of the expression. c. find a product of two factors. Find the coefficient in the product. d. Find the quotient. This is to hard. Where do I start?

asked by Bria on March 12, 2015
Math

  1. use the suitable product-to-sum formula to rewrite the following expression: sin(13x/2)sin(5x/2) 2. Find value of cos(255degrees)cos(105degrees) is it 1/4? 3. cos(pi/12) – cos(5pi/12) root3/4? 4. Use the appropriate sum-to-product formula to rewrite the

asked by mysterychicken on June 3, 2013
Chemistry
We are given that the solubility product of platinum (II) sulfide is 9.9×10^-74 We are told to write a balanced equation for dissolving platinum (II) sulfide. I put : PtS(S) Pt^2+(aq) + S^2-(aq) and then we had to write the Ksp expression: Ksp=[Pt^2+][S2-]

asked by Kellie on May 3, 2017
C programming
Enter two integers between 1 to 10 3 4 Both numbers are less than 5. The sum of two numbers is:-1081825676 The product of two numbers is:-1081825680 why are the sum and product so weird? my code: #include int main() { int x; int y; int z; int p; int

asked by jen on October 9, 2008
APChem
“The osmotic pressure of a saturated solution of strontium sulfate at 25C is 21 torr. What is the solubility product of this salt at 25C (Hint: calculate molarity from the colligative properties eqn of osmotic pressure and use it in the equilibrium

asked by Kiki on March 17, 2010
chemistry
Lead chloride dissolves in water according to PbCl2(s)↔Pb2++2Cl−(aq) The solubility in pure water has been measured to be 4.44 g⋅L−1. Calculate the solubility product of lead chloride in pure water. Your answer should be in units of molarity raised

asked by eee on December 19, 2012
Chemistry
Lead chloride dissolves in water according to PbCl2(s)↔Pb2++2Cl−(aq) The solubility in pure water has been measured to be 4.44 g⋅L−1. Calculate the solubility product of lead chloride in pure water. Your answer should be in units of molarity raised

asked by User on December 17, 2012
chemistry
Lead chloride dissolves in water according to PbCl2(s)↔Pb2++2Cl−(aq) The solubility in pure water has been measured to be 4.44 g⋅L−1. Calculate the solubility product of lead chloride in pure water. Your answer should be in units of molarity raised

asked by anita on December 17, 2012

chemistry check
Dr.Bob you had told me to ignore 2x so I wondering if I wrote my did these steps correctly. Calculate the molar solubility of nickel (II) hydroxide in 0.100 M sodium hydroxide The solubility product of nickel (II) hydroxide at 25°C is 1.6 x 10-16. Ni(OH)2

asked by mel on May 17, 2007
chemistry
What is the molar solubility of silver carbonate Ag2CO3 at 25 C if it is dissolved in a 0.15M solution of silver nitrate, AgNO3? Solubility constant: silver carbonate = 8.1 *10^(-12) Answer: 3.6 *10^(-10) So… not sure exactly what to do here. AgCO3 +

asked by molar solubility on July 30, 2011
chem 1
Okay there is a question in my book, but go figure it’s one that doesn’t have the answer in the back of the book for me to check my answer. it says predict the effect each change has on the solubility of (1)Na2CO3(s); (2)N2(g) a. increase in temperature b.

asked by sweatpea on July 28, 2012
Algebra 2

  1. The roots of the quadratic equation z^2 + az + b = 0 are 2 – 3i and 2 + 3i. What is a+b? 2. Find all pairs of real numbers (x,y) such that x + y = 6 and x^2 + y^2 = 28. If you find more than one pair, then list your pairs in order by increasing x value,

asked by Nanami on October 7, 2017
chemistry
Is it possible to calculate the value of the solubility product constant without being given any concentrations?

asked by Paul on April 23, 2011

Categories
college essay service custom dissertation writing write my dissertation for me

what is the percentage of water in the hydrate cocl2 • 6h2o

What is the percentage of water in the hydrate CoCl2 • 6H2O? Show work

I’m confused whether it’s 52.17% or 45%

0 0 324
asked by help pls!!!!!!!!
May 25, 2018
mm = molar mass
mm CoCl2.6H2O= (mm CoCl2 + mm H2O x 6)= ??
mm H2O x 6 = ?

%H2O =( mm H2Ox6/mm CoCl2.6H2O)*100 = ?

0 0
posted by DrBob222
May 25, 2018
mm CoCl2.6H2O= (mm CoCl2 + mm H2O x 6)= 108g H2O

%H2O =( mm H2Ox6/mm CoCl2.6H2O)*100 = ?45%?????

0 0
posted by help pls!!!!!!!!
May 25, 2018
(108/237.9)*100 = about 45% but with that many significant digits in the numbers I would have used AT LEAST 3 in the answer)

0 0
posted by DrBob222
May 25, 2018
3 where?

0 0
posted by help pls!!!!!!!!
May 25, 2018

At the end! That means not 45% but 45.1% or 45.2% or 45.3% or whatever that third digit is..

0 0
posted by DrBob222
May 25, 2018

Categories
Assignment Help cheap dissertation writing services coursework help write my dissertation for me

what is produced at each electrode in the electrolysis of nabr(aq)?

What is produced at each electrode in the electrolysis of NaBr(aq) and AgF(aq)?
6,972 results
CHEM..URGENT!
What is produced at each electrode in the electrolysis of NaBr(aq) and AgF(aq)?

asked by H on March 30, 2009
Analytical Chemistry
A solution prepared by mixing 51.4 mL of 0.340 M AgNO3 and 51.4 mL of 0.340 M TlNO3 was titrated with 0.680 M NaBr in a cell containing a silver indicator electrode and a reference electrode of constant potential 0.175 V. The reference electrode is

asked by Micki on April 11, 2013
chemistry
If a 0.10 M solution of silver fluoride, AgF, is mixed with a 0.10 M solution of barium acetate, Ba(C2H3O2)2, a pecipitate (ppt.) forms: AgF + Ba(C2H3O2)2–> ppt. In order to identify the precipitating ions, you conduct some experimental tests. a) what is

asked by Colby on December 2, 2011
Analytical Chemistry
A solution prepared by mixing 51.4 mL of 0.340 M AgNO3 and 51.4 mL of 0.340 M TlNO3 was titrated with 0.680 M NaBr in a cell containing a silver indicator electrode and a reference electrode of constant potential 0.175 V. The reference electrode is

asked by Micki on April 11, 2013
Analytical Chemistry
A solution prepared by mixing 51.4 mL of 0.340 M AgNO3 and 51.4 mL of 0.340 M TlNO3 was titrated with 0.680 M NaBr in a cell containing a silver indicator electrode and a reference electrode of constant potential 0.175 V. The reference electrode is

asked by Micki on April 11, 2013

chemistry
A solution prepared by mixing 47.1 mL of 0.4 M AgNO3 and 47.1 mL of 0.4 M TlNO3 was titrated with 0.8 M NaBr in a cell containing a silver indicator electrode and a reference electrode of constant potential 0.175 V. The reference electrode is attached to

asked by martini on November 9, 2013
chemistry
0.872g sample containing only NaBr and KBr gives 1.052g AgBr. what’s the % of each salt? This is the type of problem that cannot be answered without other information. I think you have made a typo in your problem I worked through it and I get negative

asked by hayat on December 12, 2006
science
When 9.6 grams of NaBr are dissolved in enough water to create a 165-gram solution, what is the solution’s concentration, expressed as a percent by mass? 4.8% NaBr 5.5% NaBr 5.8% NaBr 6.2% NaBr

asked by gary lee on November 14, 2017
SCIENCE
When 9.6 grams of NaBr are dissolved in enough water to create a 165-gram solution, what is the solution’s concentration, expressed as a percent by mass? 4.8% NaBr 5.5% NaBr 5.8% NaBr 6.2% NaBr

asked by gary lee on November 14, 2017
chem
When 9.6 grams of NaBr are dissolved in enough water to create a 165-gram solution, what is the solution’s concentration, expressed as a percent by mass? 4.8% NaBr 5.5% NaBr 5.8% NaBr 6.2% NaBr

asked by gary lee on November 14, 2017
science
When 9.6 grams of NaBr are dissolved in enough water to create a 165-gram solution, what is the solution’s concentration, expressed as a percent by mass? 4.8% NaBr 5.5% NaBr 5.8% NaBr 6.2% NaBr

asked by gary lee on November 14, 2017
Chemistry
Elemental calcium is produced by the electrolysis of molten CaCl2. a) What mass of calcium can be produced by this process if a current of 7.5 * 10^3 A is applied for 48h? Assume that the electrolytic cell is 68% efficient. b) What is he minimum voltage

asked by ACDub on April 10, 2014
Chemistry
A copper electrode weighs 35.42 g before the electrolysis of a CuSO4(aq) solution and weighs 36.69 g after the electrolysis has run for 20.0 min. What was the amperage (Amps) of the current used? this is the equation that i used is it correct (1.27g Cu x 1

asked by Anonymous on May 3, 2017
chemistry
Write the anodic reaction for the electrolysis of zinc chloride solution using platinum electrode

asked by osmon armin on September 28, 2016
chemistry
The mercury cell is still sometimes used in industry to prepare chlorine, Cl2, and caustic soda, NaOH. (a)In the first stage of the process a solution of sodium chloride is electrolysed using a voltage of 4.00V. Chlorine gas is obtained at one of the

asked by Anonymous on March 27, 2010

Chemistry
Show the half equations at the anode and cathode for an electrolysis of concentrated magnesium chloride solution using inert electrode

asked by Eddie on May 18, 2014
Science
NaBR+ AgNO3- AgBr+ NaNO3 AgNO3=reagent A NaBr=reagent B When 4.36 grams of AgNO3 react with 5.05 grams of NaBr, which is the limiting reagent? How many grams of the excess reagent remain? How many grams of AgBr are produced in the reaction?

asked by Raz on October 5, 2007
CHEMISTRY
2NaBrO3 reacts to 2NaBr + 3O2 How many grams of NaBrO3 are required to produce 19 grams of O3? How many liters of 02 are produced from 4 moles of NaBrO3? How many atoms of NaBr are produced when 1 mole of O2 is produced?

asked by helen on May 22, 2012
Chemistry
Elemental calcium is produced by the electrolysis of molen CaCl2. What mass of calcium can be produced by this process if a current of 8500 A is applied for 39 h? Assume that the electrolytic cell is 65% efficient. I found the mass to equal 1.6 x10^5g Ca,

asked by Julie on November 15, 2009
Chemistry
Which statement is true for the cell as it discharges? Zn | Zn2+(1 .0 M) || Sn2+(1.0 M) | Sn (A) Oxidation occurs at the tin electrode. (B) Electrons will flow from the tin electrode to the zinc electrode. (C) The concentration of Zn2+ will increase. (D)

asked by LT on May 12, 2008
Chem
Can someone please explain how to tackle this problem? Cu – Anode electrode Zn – Cathode electrode A current of 2 amps is sustained for 16 minutes. what mass of Cu(s) is deposited on the zinc electrode? (Faradays’ constant: 96500 C/mol e-)

asked by Sarah on July 5, 2016
Physics
Can someone please explain how to tackle this problem? Cu – Anode electrode Zn – Cathode electrode A current of 2 amps is sustained for 16 minutes. what mass of Cu(s) is deposited on the zinc electrode? (Faradays’ constant: 96500 C/mol e-) Please and thank

asked by Sarah on July 5, 2016
Chemistry
Elemental calcium is produced by the electrolysis of molen CaCl2. What mass of calcium can be produced by this process if a current of 8500 A is applied for 39 h? Assume that the electrolytic cell is 65% efficient. I found the mass to equal 1.6 x10^5g Ca,

asked by Julie on November 18, 2009
chemistry
During the electrolysis of molten aluminum chloride in an electrolytic cell, 5.40 g of aluminum is produced at the cathode. Predict the mass of chlorine produced at the anode.

asked by Rishikesh on April 19, 2008
college chemistry

  1. what voltage is necessary to force the following electrolysis reaction to occur? which process would occur at the anode? cathode? assuming the iodine oxidation takes place at a platinumm electrode, what is the direction of electron flow in this cell?

asked by Anonymous on May 20, 2015

chemistry
how many moles of NaBr are produced from reacting 20.05 moles of AuBr3 with excess NaCN? AuBr3 +NaCN -> Au(CN)3 + NaBr

asked by jim on October 22, 2012
chemistry
how many moles of NaBr are produced from reacting 20.05 moles of AuBr3 with excess NaCN? AuBr3 +NaCN -> Au(CN)3 + NaBr

asked by jim on October 22, 2012
chemistry
Electrolysis of water produces hydrogen gas and oxygen gas, which can be collected over water: 2H2O(l) → 2H2(g) + O2(g) An electrolysis reaction at 735 mmHg pressure produced 25.00L of gas at 25°C; at which point, the vapor pressure of water is 23.76

asked by Lay on October 13, 2015
physics
In an experiment, I drew two small electrodes on a piece of carbon paper then a large electrode around the perimeter of the paper so it formed a box around the two. What distortion of the field is produced by the large electrode around the perimeter of the

asked by Ramesh on October 25, 2018
Chemistry
In the electrolysis of water 75.0 cm3 of oxygen gas are produced.How many cm3 of hydrogen are produced ?

asked by Nick on November 23, 2015
Chemistry
Sulfuric acid/ Lead Battery: -the electrodes for the battery are composed of Pb(s), PbO2, and/or PbSO4. What are the half reaction occuring at each electrode? include electrolysis of water: Process Anode/Cathode Initial Charging: Discharging Recharging

asked by sara on April 26, 2008
chemistry help
Suppose the Cu electrode was replaced by an Al electrode. In order for this new cell to be a galvanic cell, which electrode would be the anode, Zinc or Aluminum?

asked by Anonymous on May 16, 2015
precal
Suppose the Cu electrode was replaced by an Al electrode. In order for this new cell to be a galvanic cell, which electrode would be the anode, Zinc or Aluminum?

asked by Anonymous on May 28, 2015
Chemistry
Identify the relative molar amounts of the species in 0.10 M NaBr(aq). NaBr, Na+, Br-, H3O+, OH-, H2O

asked by Hei on April 4, 2013
Chemistry
Identify the relative molar amounts of the species in 0.10 M NaBr(aq). NaBr, Na+, Br-, H3O+, OH-, H2O

asked by Hei on April 6, 2013

Chemistry
What would the product be: 1.NaBr + CI2 2.NaBr + Br2 Would the products be: 1. Iodine? 2. Bromine? Thank You!

asked by Fisher on February 18, 2012
chemistry
what mass of AgBr is produced when 100.0 mL of 0.150 M AgNO3 is added to 20.0 mL of 1.00 M NaBr?

asked by paul on January 27, 2015
College Physics
Current passes through a solution of sodium chloride. In 1.00 second,2.68 x 10^16 Na+ ions arrive at the negative electrode and 3.92 10^16 Cl- ions arrive at the positive electrode. What is the current passing between the electrodes? mA What is the

asked by Lanise on February 6, 2010
Chemistry
Aluminum is produced by the electrolysis of aluminum oxide (Al2O3, bauxite ore) dissolved in molten cryolyte (Na2AlF6). Calculate the mass of aluminum that can be produced in one day in an electrolytic cell operating continuously at 1.0 x 105 amps. The

asked by Jason on April 5, 2017
Chemistr repost
Determine the cell potential (in V) for a platinum electrode in an acidic solution of 0.004M H+(aq), 3.226M ClO4-(aq) and 4.445M ClO3- (aq) ions, coupled to a gold electrode in 3.238 M Au3+ (aq) at 307.10 K. Im confused about the mulitple molarities given

asked by Matt on March 1, 2008
Chemistry
Determine the cell potential (in V) for a platinum electrode in an acidic solution of 0.004M H+(aq), 3.226M ClO4-(aq) and 4.445M ClO3- (aq) ions, coupled to a gold electrode in 3.238 M Au3+ (aq) at 307.10 K. Im confused about the mulitple molarities given

asked by Matt on March 1, 2008
chemistry..
(1) The same quantity of electricity is passed through 2voltameters connected in series, one copper voltmeter with copper electrode in a copper(ii) tetraoxosulphate(vi) solution. The other platinum electrode in a dilute solution of tetraoxosulphate (vi)

asked by dannystein on February 13, 2016
chemistry
(1) The same quantity of electricity is passed through 2voltameters connected in series, one copper voltmeter with copper electrode in a copper(ii) tetraoxosulphate(vi) solution. The other platinum electrode in a dilute solution of tetraoxosulphate (vi)

asked by dannystein on February 12, 2016
College Physics
Current passes through a solution of sodium chloride. In 1.00 second, 2.68 x 10^16 Na+ ions arrive at the negative electrode and 3.92 x 10^16 Cl-ions arrive at the positive electrode. What is the current passing between the electrodes? Current = mA What is

asked by Lanise on February 6, 2010
chem
If 10.4 liters of O2 at STP are produced by the electrolysis of water, how many coulombs of charge were required?

asked by sarah on April 20, 2013

chemistry
If 10.4 liters of O2 at STP are produced by the electrolysis of water, how many coulombs of charge were required?

asked by sarah on April 21, 2013
Chemistry
How many grams of NaBr are contained in 85.0 mL of a 2.10 M NaBr solution? I’m not sure how to go about this..

asked by Roxie on December 1, 2010
chemistry
What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

asked by Nabiha on November 8, 2009
chemistry
What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

asked by Nabiha on November 8, 2009
Chemistry
How many grams of hydrogen can be produced by the electrolysis of water with a current of 0.290 A running for 5.00 min?

asked by Heidi on August 17, 2011
Chemistry
If 30.3 liters of O2 at 273K and 1 atm are produced by the electrolysis of water, how many coulombs of charge were required?

asked by Dana on November 19, 2010
Chemistry
If 30.3 liters of O2 at 273K and 1 atm are produced by the electrolysis of water, how many coulombs of charge were required?

asked by Dana on November 19, 2010
Chemistry
If 30.3 liters of O2 at 273K and 1 atm are produced by the electrolysis of water, how many coulombs of charge were required?

asked by Dana on November 19, 2010
chem
Calculate the volume of hydrogen produced by the electrolysis of 54.0 mL of water at 27.°C and 1.3 atm, using the ideal gas approximation.

asked by marl on June 28, 2011
chemistry
Calculate the mass of Li formed by electrolysis of molten LiCl by a current of 7.5X10^4 A flowing for a period of 24 hours. Assume the electrolysis is 85% effective.

asked by Nikolai on April 11, 2012

Chemistry
Using a table of standard electrode potentials (such as the one in your textbook), calculate the standard cell potential for a cell made by placing a zinc electrode in a Zn2+(aq) solution which is connected by an electrolyte to a Ag+(aq) solution

asked by CHEM HELP ASAP on May 13, 2014
Chemistry ASAP
Using a table of standard electrode potentials (such as the one in your textbook), calculate the standard cell potential for a cell made by placing a zinc electrode in a Zn2+(aq) solution which is connected by an electrolyte to a Ag+ (aq) solution

asked by Tyler on May 13, 2014
Chemistry
1) Using a table of standard electrode potentials (such as the one in your textbook), calculate the standard cell potential for a cell made by placing a zinc electrode in a Zn2+(aq) solution which is connected by an electrolyte to a Ag+(aq) solution

asked by CHEM HELP ASAP on May 13, 2014
chemistry
What substance is produced at the cathode during the electrolysis of molten calcium bromide, CaBr2? Assume standard conditions.

asked by sam on April 5, 2011
Chemistry
A sodium selective electrode indicates a 34.2 mV response to a 2.50 x 10-4 M Na+ standard solution. Assuming ideal electrode response, what is the sodium concentration of a sample when the electrode indicates a 35.2 mV response?

asked by RC on August 12, 2013
chemistry
How many grams of hydrogen can be produced by the electrolysis of water with a current of 0.442 A running for 2.00 min? I got 0.000549g. can someone check my answer

asked by long on May 5, 2010
Chem
Is this the balanced chemical equation for reaction between NaBr and H2SO4? H2SO4 + NaBr —> HBr + NaHSO4

asked by Marisol on October 28, 2007
Science
Chargers extend the life of the rechargeable batteries by: A) adding protons to the positive electrode B) adding electrons to the positive electrode C) moving electrons back to the positive electrode D) Moving electrons back to the negative electrode

asked by Sammy on February 25, 2015
Chemistry
1) Using a table of standard electrode potentials (such as the one in your textbook), calculate the standard cell potential for a cell made by placing a zinc electrode in a Zn2+(aq) solution which is connected by an electrolyte to a Ag+(aq) solution

asked by CHEM HELP ASAP on May 13, 2014
chemistry
I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture.

asked by albee on April 29, 2010

Chemistry
How many grams of salt can be produced from five grams of sodium and unlimited bromine? Is this 39.75 g NaBr?

asked by Anonymous on February 17, 2016
Chemistry
29.25g of sodium chloride is added to water and undergoes electrolysis according to this equation 2Cl-=Cl2 Calculate the mass of chlorine produced. I am lost with this one !

asked by Karen on December 3, 2017
organic chemistry
What alkyl halide or product will I get if I mix 2,4-dimethyl-3-pentanol with NaBr and sulfuric acid, and what substitution mechanism, SN1 or SN2 will that reaction undergo? Thanks in advance. What if I mix 1-propanol with NaBr and sulfuric acid, what

asked by needhelpwithchem on April 20, 2009
Chemistry
What is the mole fraction of NaBr in an aqueous solution that contains 20.1% NaBr (weight/weight%)?

asked by Steve on April 7, 2016
chemistry
Electrolysis is carried out for 2.00 h in the following cell. The platinum cathode which has a mass of 25.0782 g, weighs 25.8639g after the electrolysis. The platinum anode weighs the same before and after the electrolysis. there is H2SO4(aq) on the anode

asked by Anonymous on February 10, 2015
chemistry
A galvanic cell with e o cell = 0.30 v can be constructed using an iron electrode in a 1.0 m fe(no3)2 solution, and either a tin electrode in a 1.0 m sn(no3)2 solution, or a chromium electrode in a 1.0 m cr(no3)3 solution even though sn2+/sn and cr3+/cr

asked by wallace on August 12, 2018
Chemistry
How many moles of mercury will be produced by electrolysis 1 m hg (no3)^2 solution with a current of 2A for 3 hours. Hg (no3)^2=200.6

asked by Amrish gaur on July 25, 2018
Chemistry
When electricity is applied to a molten binary salt, the cation will be reduced and the anion will be oxidized. The electrolysis of CaBr2(l), for example, produces Ca(s) at the cathode (from the reduction of Ca2+) and Br2(l) at the anode (from the

asked by Anonymous on April 17, 2011
Chemistry
When electricity is applied to a molten binary salt, the cation will be reduced and the anion will be oxidized. The electrolysis of CaBr2(l), for example, produces Ca(s) at the cathode (from the reduction of Ca2+) and Br2(l) at the anode (from the

asked by Anonymous on April 17, 2011
Chemistry
When electricity is applied to a molten binary salt, the cation will be reduced and the anion will be oxidized. The electrolysis of CaBr2(l), for example, produces Ca(s) at the cathode (from the reduction of Ca2+) and Br2(l) at the anode (from the

asked by Anonymous on April 17, 2011

Chemistry
The standard electrode potentials for three electrode systems are: Ti^3+(aq) + e^- –> Ti^2+ E= -0.37 Fe^3+ —> Fe^2+(aq) E= +0.77 Ce^4(aq) + e^- —> Ce^3+(aq) E= +1.45 Using the data above, deduce which species is the best reducing agent, giving a

asked by Kari on March 15, 2010
chemistry
hey drbob222 do you think you could help me out with this lab. Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: balance steel can tin electrode power source wire lead (x2) tin (II)

asked by unknown on April 14, 2008
Chemistry-HELP!!!
Show the side reactions and products that can occur when 1-butanol is treated with NaBr and H2SO4. R-OH (yields:NaBr and H2SO4) 1-bromobutane + water + sodium bisulfate This question was posted before, but I have the same question and seriously need

asked by Paul on October 31, 2007
AP Chem
An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni2+] = 1.0 M separated by a porous disk from an aluminum metal electrode. (a) What is the potential of this cell at 25°C if the aluminum electrode is placed in a

asked by Halie on April 1, 2011
Chemistry
what type of reaction is AgF + CaCl2 –> AgCL + CaF2 ?

asked by Toni on January 11, 2013
Chemistry: Please check answers

  1. What balances charges that may build up as reduction and oxidation occur in a voltaic cell? *the salt bridge one of the half-cells the electrolyte solutions the moving electrons 13. What is the electrode in the center of the most common dry cell made

asked by Cassie on April 9, 2013
chemistry
Calculate the mass of Li formed by electrolysis of molten LiCl by a current of 6.7×104 A flowing for a period of 23 h . Assume the electrolytic cell is 86 % efficient. What is the energy requirement for this electrolysis per mole of Li formed if the

asked by Derick on September 21, 2017
CHEMISTRY
I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture. I used the following

asked by albee on April 29, 2010
Chemistry
A solution of K2CrO4 was titrated with AgNO3, using a silver indicator electrode (E=0.799V) and a S.C.E. electrode (E=0.241V). The product, Ag2CrO4, has a Ksp = 1.1×10^-12. What is the potential at the equivalence point?

asked by Jeanie on May 28, 2012
CHEMSTRY
. A small amount of solid Hg2Cl2 and 25 ml of metallic mercury were added to a solution of 5.03 x 10-2 M NaCl. A platinum electrode immersed in the layer of mercury was connected to a reference half-cell whose electrode potential was 0.222V. The voltage of

asked by ABDULALEH on November 22, 2008

chemistry
ok, so i did a lab called: measurements using electrochemical cels and electroplating, and one of the post lab questions asks,if the student fails to dry the electrode, in this case (Cu+2), what effect does it have on the calculated value of Faraday? and

asked by K on December 12, 2013
Chemistry
A voltaic cell consists of Ag/Ag+2 electrode E= 0.80 and a Fe+2/Fe+3 electrode E=0.77 with the following initial molar concentrations: [Fe+2}= 0.30 M [Fe+3]= 0.10 M [Ag+]=0.30 M. What is the equilibrium concentration of Fe+3? (Assume the anode and the

asked by Jackie on July 20, 2012
chemistry
Relative to pure water, what can you expect for the solubility of AgF in .10 M Hcl? Explain please….

asked by Anonymous on November 30, 2010
physics
A parallel plate capacitor is made of two 3.0 cm x 3.0 cm square plates that are separated by 1.0 mm are connected to a12.0 V battery. If and electron is released from the negative electrode, what speed will it reach by the time it arrives at the positive

asked by So Confused on February 10, 2011
chemistry
Here is the full lab: Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: Balance Steel can Tin electrode Power Source Wire lead (x2) tin(II) chloride solution (3.25 M) Timer Large

asked by Rendier on April 18, 2008
chem 2
Consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in a AgNO3 solution. The two

asked by Anonymous on May 29, 2014
Chemistry-weak acid affects the pH?
For which salt in each of the following groups will the solubility depend on pH? AgCl AgF AgBr please explain why its the answer

asked by Amy on March 16, 2009
chemistry
To what pH should you adjust a standard hydrogen electrode to get an electrode potential of -0.124V V ? (Assume that the partial pressure of hydrogen gas remains at 1 atm.)

asked by JAC on September 15, 2013
Chemistry
To what pH should you adjust a standard hydrogen electrode to get an electrode potential of -0.122 V ? (Assume that the partial pressure of hydrogen gas remains at 1 atm.)

asked by L on November 21, 2016
Chemistry
Why doesn’t water undergo electrolysis? Why does Na2SO4 undergo electrolysis?

asked by Jake on March 19, 2012

Chemistry
Why doesn’t water undergo electrolysis? Why does Na2SO4 undergo electrolysis?

asked by Anisha on March 19, 2012
chemistry
The amount of lactic acid, HC3H5O3, produced in a sample of muscle tissue was analyzed by reaction with hydroxide ion. Hydroxide ion was produced in the sample mixture by electrolysis. The cathode reaction is given below. 2 H2O(l) + 2 e ‾ → H2(g) + 2

asked by Long on May 3, 2010
Chemistry
If E Cu+2 had been chosen as the standard reference electrode and had been assigned a potential of 0.00 V, what would the reduction potential of the hydrogen electrode be relative to it?

asked by Pete on April 16, 2015
Chemistry
Suppose a galvanic cell contains one nickel electrode and one copper electrode. At 25°C, nickel has a negative reduction potential and copper has a positive reduction potential. At which electrode will reduction occur? Explain. I believe the copper will

asked by Morgan on February 19, 2015
chemistry
A mixture of NaCl and NaBr has a mass of 2.04g and is found to contain 0.70g of Na. What is the mass of NaBr in the mixture?

asked by Anonymous on September 30, 2013

Categories
Assignment Help buy coursework college essay service dissertation proposal help write my dissertation for me

rank these substances in order of increasing solubility in water.

Arrange the following compounds in order of increasing solubility in water:

  • O2
  • LiCl
  • Br2
  • CH3OH

Like dissolves like; that is, polar compounds usually are soluble in water and non-polar compounds are not soluble in water. From that description, make your choices and post what you think. We can help you from there. OR, tell us what you don’t understand about the question.

So, O2 is nonpolar, and is therefore not soluble. Br2 is also nonpolar, so how do I know which one is more soluble? LiCl is ionic – does that mean it is soluble? I know NaCl is soluble and that’s an ionic compound. CH3OH has some polar and nonpolar bonds. Where do I go from there?

You are right that oxygen is only slightly soluble in water. Bromine reacts with water to form HOBr and HBr so there is more solublity there. LiCl, if it is ionic, must be polar and (you did well to compare with NaCl because both Li and Na are in group IA of the periodic table) so you would expect LiCl to be quite soluble. Methyl alcohol is essentially miscible with water in all proportions (see the OH group on CH3OH and note HOH has the same OH from water). So it is an educated guess as to which, LiCl or CH3OH, has the greater solubility. I looked up LiCl and 1 gram will dissolve in 1.3 mL cold water or 0.8 mL hot water (VERY soluble). I believe CH3OH is miscible ihn all proportions so I would rank it higher. However, you form your own conclusion.

so it would be O2, Br2, LiCl, CH3OH. Very confusing.

Br2
CH3OH
LiCl
O2

What is the I- concentration just as AgCl begins to precipitate when 1.0 M AgNO3 is slowly added to a colution containing 0.020 M Cl- and 0.020 M I-?

0 0 1,068
asked by Belinda
Jan 2, 2007
it’s based on intermolecular forces too. br and o are both nonpolar so it’s all like “why would one be more soluable than the other?” but it’s because br has more dispersion forces since it has more electrons. so br is a little bit more polarish (although not technically polar), and since water is very polar, that means it wants to bond with the most polarish atom. so o2 is definently first. then br. what about licl and ch3oh? well, both are polar, but ch3oh has hydrogen bonds. hydrogen bonds are stronger. water, too, has hydrogen bonds. so it wants to bond with another hydrogen bond more than it wants to bond with just a dipole. therefore ch3oh is the most. why is licl before the diatomics, though? because licl still behaves more polarish than the diatomics. just think about intermolecular forces and it all makes sense. (sorry if this is really confusing… it makes no sense without a firm grasp of intermolecular forces plus i’ve been studying this stuff for the past six hours -_-)

1 0
posted by mackenzie
Feb 5, 2010
Arrange compounds in order of increase lattric energy MgCl2.SrCl2. BaCl2.MgF2. Bal2

0 0
posted by jasmine
Nov 6, 2013
i dont know

0 0
posted by LeGiTSCOPES
Apr 9, 2017

Categories
Assignment Help college essay service dissertation writing services write my dissertation for me

how can fishermen save gas

What is the answer to Algebra with pizzaz p.93

How Can Fisherman Save Gas?

0 0 455
asked by Chris
Mar 2, 2009
We are not among the privileged owners of your course materials. Perhaps you could enlighten us about what the question is, and show your work.

Fishermen can save gas by staying home.

1 1
posted by drwls
Mar 2, 2009
By forming carp pools(no spaces).

1 0
posted by Marissa
Aug 12, 2011
4n^2-49

0 0
posted by maria
Feb 12, 2018