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Which elements symbol could replace the question mark in the diagram?

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Which elements symbol could replace the question mark in the diagram?

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Which elements symbol could replace the question mark in the diagram?

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Answer;

-Tellurium

Explanation;

The oxygen family consists of the elements found in Group 16 of the periodic table and is considered among the main group elements. It consists of the elements oxygen, sulfur, selenium, tellurium and polonium.

All group 16 elements have six valence electrons and are very reactive. therefore the appropriate answer is Tellurium.

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When should you replace the co2 cylinder in an inflatable pfd?

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Answered by answersmine AT 22/10/2019 – 04:58 AM

The Co2 cylinder must be replaced anytime it is punctured. A CO2 cylinder is punctured if it automatic inflates when the user enter water. The PDF should be examined regularly to ensure that there is no leak in the vest. The typical recommended expiry date for PDF CO2 cylinder is one to two years, this recommendation should be followed even if the cylinder is not punctured. 

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What is the effect of envisioning “aged years” as needing a staff in these lines from the passage? By that time will my aged years perhaps a staff require: It evokes the comfort that the elderly feel knowing that a younger generation will replace them. It reminds the reader that the speaker will be aged by the time she can see the youths as adults. It suggests that the speaker feels distant and isolated from the young people of her time. It reveals how weary the speaker is of waiting to see what effect she might have had on others.

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Answer:

Dogs can be strong companions, but they also have needs that many people forget to address.

Explanation:

The author’s claim is that many people forget to address the needs of their dogs. The author continues to talk about some of those needs, like regular washing and grooming to avoid becoming matted and sick. The author is not simply talking about washing and grooming, but other needs the dogs might have as well. These could include things like walking, a proper diet, or brushing their teeth.

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A company needs to replace 27 out of 45 desks in their office. What percent of the desks need to be replaced?

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A company needs to replace 27 out of 45 desks in their office. What percent of the desks need to be replaced?

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A company needs to replace 27 out of 45 desks in their office. What percent of the desks need to be replaced?

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A company needs to replace 27 out of 45 desks in their office. What percent of the desks need to be replaced?

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Replace 27 out of 45 desks. What percent of the desks need to be replaced?

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Answer:

The correct option is 1.

Step-by-step explanation:

It is given that Inez has to pay 4 percent in closing costs and 16 percent for the down payment on a purchase of $225,500 with an ARM.

So, Inez has to pay 20% of $225,500.

225500times frac{20}{100}=45100

Therefore Inez has to pay $45100 as closing cost and down payment.

Over the life of the loan, she will pay $262,072.72.

The total cost of her house is the sum of $262,072.72 and $45100. Because the total cost is the sum of down payment, closing cost and the payments over the life of the loan.

$262,072.72+$45100=$307,172.72

Therefore the correct option is 1.

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A jar of coins contains 8 pennies, 5 nickels, 12 dimes, 7 quarters. you choose a coin at random, do not replace it, and then choose another coin. what is probability of choosing a dime first and quarter second

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A jar of coins contains 8 pennies, 5 nickels, 12 dimes, 7 quarters. you choose a coin at random, do not replace it, and then choose another coin. what is probability of choosing a dime first and quarter second

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A company is interested in buying a new machine to replace their outdated equipment. However, before committing to the purchase, the company asked the manufacturer to provide data on a certain machine’s efficiency. The data suggests that with a supplied energy at a rate of 1600 w, the machine will do useful work at a rate of 1540 w. What’s the efficiency of this particular machine

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Answer:

1) Water has very high specific heat.

2) It expands when it freezes

3) ability to dissolve in ionic substances

4) Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid.

Explanation:

1) Water molecules due to their high specific heat , undergo relatively less increase in temperature after absorbing heat. So they prevent their adjoining area to experience sharp increase in temperature.

2) Water is an example which expands on freezing. In it , large spaces are left between molecules when it cools. It happens because hydrogen bonds prevent any two molecules to come very close thereby  creating gaps. This gap is filled up when ice melts , which results in overall reduction in volume of water.

3) Uneven distribution of charge results in water molecules becoming polar in nature . A polar substance  can be dissolved in polar solvents only.

4) It is due to property of surface tension. Property  of surface tension results due to molecules of water near the surface experiencing a  net downward  force due to hydrogen bonds . It is due to fewer hydrogen bonds made by them.

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If nickel is added to copper sulfate solution, the nickel will replace the copper. write the balanced equation

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Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

(a) The given balanced ionic equation is,

Ni(NO_3)_2(aq)+Na_2S(aq)rightarrow NiS(s)+2NaNO_3(aq)

The ionic equation in separated aqueous solution will be,

Ni^{2+}(aq)+2NO_3^-(aq)+2Na^+(aq)+S^{2-}(aq)rightarrow NiS(s)+2Na^+(aq)+2NO_3^-(aq)

In this equation, Na^+text{ and }NO_3^- are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

Ni^{2+}(aq)+S^{2-}(aq)rightarrow NiS(s)

(b) The given balanced ionic equation is,

NaNO_3(aq)+KBr(aq)rightarrow KNO_3(s)+NaBr(aq)

The ionic equation in separated aqueous solution will be,

Na^+(aq)+NO_3^-(aq)+K^+(aq)+Br^-(aq)rightarrow KNO_3(s)+Na^+(aq)+Br^-(aq)

In this equation, Na^+text{ and }Br^- are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

NO_3^-(aq)+K^+(aq)rightarrow KNO_3(s)

(c) The given balanced ionic equation is,

Li_2SO_4(aq)+BaCl_2(aq)rightarrow BaSO_4(s)+2LiCl(aq)

The ionic equation in separated aqueous solution will be,

2Li^+(aq)+SO_4^{2-}(aq)+Ba^{2+}(aq)+2Cl^-(aq)rightarrow BaSO_4(s)+2Li^+(aq)+2Cl^-(aq)

In this equation, Li^+text{ and }Cl^- are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

SO_4^{2-}(aq)+Ba^{2+}(aq)rightarrow BaSO_4(s)

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Evaluate 4x – 7 when x = 6 Replace the variables/letters in the expression above with the values assigned to them, so replace all x’s with 6 in this example implify the expression (following order of operations)

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Answer:

C. Yes, because the population values appear to be normally distributed.

Step-by-step explanation:

Given is a graph which shows the distribution of values of a population

The graph has the following characteristics

i) Bell shaped

ii) symmerical about mid vertical line

iii) Unimodal with mode = median =mean

iv) As x deviates more from the mean probability is decreasing and also curve approaches asymptotically the x axis

Hence we find that the curve is a distribution of normal

Option C is right

C. Yes, because the population values appear to be normally distributed.

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Emily wants to find out about training and reads the leaflet below. She notices an error in grammar in the first paragraph of the text. Find the error and replace it with the correct verb form. Training your dog It is very important to train your dog. It keeps your dog’s mind active, and it help to build an understanding between you and your dog. Often, owners will shout at their dogs or even punish them when what is needed is training.

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Answer:

Training your dog

It is very important to train your dog. It keeps your dog’s mind active, and it help to build an understanding between you and your dog. Often, owners will shout at their dogs or even punish them when what is needed is training.

The error in grammar: it help

Correct verb form: it helps

Explanation:

In the simple present tense, third-person singular pronouns, like she, he and it, use conjugated verbs formed by the base form of a verb and the affix -s, -es, or -ies. For example: helps, thinks, cries, watches. In the excerpt provided, the error is in the verb help because it is not correctly conjugated for the pronoun it: it is missing an s at the end.

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Which statement explains the relationship between literary devices and theme? Literary devices are theme. Literary devices distract from the theme. Literary devices replace a theme. Literary devices emphasize theme.Which statement explains the relationship between literary devices and theme? Literary devices are theme. Literary devices distract from the theme. Literary devices replace a theme. Literary devices emphasize theme.

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Answer:

Training your dog

It is very important to train your dog. It keeps your dog’s mind active, and it help to build an understanding between you and your dog. Often, owners will shout at their dogs or even punish them when what is needed is training.

The error in grammar: it help

Correct verb form: it helps

Explanation:

In the simple present tense, third-person singular pronouns, like she, he and it, use conjugated verbs formed by the base form of a verb and the affix -s, -es, or -ies. For example: helps, thinks, cries, watches. In the excerpt provided, the error is in the verb help because it is not correctly conjugated for the pronoun it: it is missing an s at the end.

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What is cancer? addition of new cells to replace damaged cells DNA replication cellular death uncontrolled cell division

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Answer:

Helicases unwind the two parental DNA’s strands and creates the replication fork; single strand binding proteins keep the single strand from joining.


Further information:

• DNA replication: a biological method occurring in all living organisms that is the basis for biological inheritance

Helicase: It is an enzyme that may unwinds the DNA helix ahead of the replication machinery.

Origin of replication: a specific sequence in a genome at which replication is started.


Steps of DNA replication:

• During initiation, proteins fix to the source of replication while helicase unwinds the DNA helix and two replication forks are formed at the source of replication.

• During elongation, a primer sequence is added with complementary RNA nucleotides, which are then substituted by DNA nucleotides.

• During elongation the leading strand is made constantly, while the lagging strand is made in portions called Okazaki fragments.

• During termination, primers are detached and substituted with new DNA nucleotides and the backbone is stuck down by DNA ligase.

Purpose of DNA replication:

The purpose of DNA replication is to produce two duplicate copies of a DNA molecule. This is essential for cell division during development or repair of damaged tissues. DNA replication ensures that each new cell receives its own replica of the DNA.

Answer details:

Subject: Biology

Level: High school

Keywords:

• DNA replication

• Helicase

• Origin of replication

• Steps of DNA replication

Learn more to evaluate:

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What should you replace every 15000 miles in a motor vehicle?

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What should you replace every 15000 miles in a motor vehicle?

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Paleontologists have found evidence that after a major extinction occurs, _____. a. there is no particular pattern of speciation b. many new species often appear at about the same time c. a new species evolves to replace each species that became extinct d. most species move away because they cannot adapt

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Neutralization refers to a chemical reaction in which an acid and a base react quantitatively with each other to produce a salt and water. Thus, it can be matched with: The products are always salt and water.

Combustion refers to the brisk chemical combination of a substance with oxygen, incorporating the generation of light and heat. Thus, it can be matched with: Oxygen is one of the reactants, and a large amount of energy is released.  

A synthesis reaction is a kind of reaction in which various reactants merge to produce a single product. Thus, it can be matched with: The reaction has at least two reactants and one product.  

A decomposition reaction refers to a kind of chemical reaction in which a solitary compound dissociates into two or more new elements or compounds. Thus, it can be matched with: The reaction has one reactant and at least two products.

A replacement reaction is a kind of chemical reaction where an element reacts with a compound and occupies the position of another element in that compound. Thus, it can be matched with: One or more atoms replaces a part of a compound.  

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Single-replacement reactions A. Consists of two reactants producing two products B. Involve a single product C. Occur when any metal can replace any other metal D. Are restricted to metals

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The answer 

the main rule
A  —– B
A is the reactants  and B the products of a reaction
the number of atome of the elements of A must be equal to the number of atome of the elements of B
in our case
to balance the equation
a0 KI + a1 Pb(NO3)2 → a2 PbI2 + a3 KNO3
 2KI      +   Pb(NO3)2  →     PbI2 +     2KNO3
proof

A (reactants ) ——————– B (products)

 2KI means  2K,   2I             PbI2 :   2I,  2KNO3:  2K ( K and I are balanced) 
 Pb(NO3)2:
1 Pb, 2 NO3                         PbI2 and 2KNO3:  
                                             1Pb and  2 NO3 (Pb and NO3 are balanced)

finally 
 a0= 2,  a1= 1, a2= 1, a3=2                            
            

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Which words could replace the subordinating conjunction in the sentence while maintaining its original structure? Check all that apply.

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Answer:

2) To present an interpretation.

The author of the passage is providing an interpretation of the book in this sentence. He is arguing that the novel is affirmative and hopeful, and that it stresses the power of humans to reach for greatness and inspire others. This is never explicitly stated in the novel. Therefore, the argument is based on his subjective views and analysis.

4) He also suffers a painful loss.

This revision is the best one for sentence 4. It gives the reader the same idea as the other options. However, it is written more clearly and in an active voice.

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In a bag of apples there are 4 green apples and 2 red apples. Bethany takes a green apple out of the bag and does not replace it. She then takes another apple out of the bag. What is the probability that the second apple is red? a. 1/5B) 1/6C) 2/5 d. 2/6

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Answer: There is 23.07% of decrease.

Step-by-step explanation:

Since we have given that

Charges at night during the summer = $52.00

Charges at night during a fall = $40.00

Decrease in charges is given by

$52.000-$40.00\\=$12.00

So, Percentage of decrease is given by

dfrac{12}{52}times 100\\=23.07%

Hence, there is 23.07% of decrease.

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Miriam has a bag that contains 10 red marbles and 6 blue marbles. she chooses two marbles at random and does not replace them. what is the probability that the first marble is blue and the second marble is red? a. b. c. d.

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Answer: dfrac{1}{12}

Step-by-step explanation:

Given : The number of faces in a fair number pyramid (1,2,3,4) =4

Let A be the event that number pyramid will land on three.

Then, P(A)=dfrac{1}{4}

The number of equal sized colored sections in spinners= 3

Let B be the event that  the spinner will stop on blue.

Then, P(B)=dfrac{1}{3}

Since, both the events A and B are independent.

Thus, the probability that the number pyramid will land on three and the spinner will stop on blue is given by :-

P(Acap B)=P(A)times P(B)\\=dfrac{1}{4}timesdfrac{1}{3}=dfrac{1}{12}

Hence, the probability that the number pyramid will land on three and the spinner will stop on blue =dfrac{1}{12}

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