Choose the pair of substances that are most likely to form a homogeneous solution. N2O4 and NH4Cl C6H14 and C10H20 LiBr and C5H12 C6H14 and H2O None of the pairs

48,460 results

chemistry

Choose the pair of substances that are most likely to form a homogeneous solution. N2O4 and NH4Cl C6H14 and C10H20 LiBr and C5H12 C6H14 and H2O None of the pairs above will form a homogeneous solution.

asked by reem on February 3, 2016

chem- to clarify….

“How does a gas differ from a liquid with respect to the following property: Ability to mix with other substances of the same phase to form homogeneous mixtures Gases form homogeneous mixtures with each other regardless of the identities or relative

asked by Anon. on December 9, 2009

chem

How does a gas differ from a liquid with respect to the following property: Ability to mix with other substances of the same phase to form homogeneous mixtures Gases form homogeneous mixtures with each other regardless of the identities or relative

asked by asdf on December 9, 2009

science

Will you please check my answers? Substances or mixtures? 1. Carbon Dioxide = M 2.salt water =M 3. table salt = M Homogeneous or Heterogeneous Matter- 1. flat soda pop = Heterogeneous 2. aluminum foil = Homogeneous 3. black coffee = Homogeneous 4. beach

asked by Reed on September 12, 2012

Chemistry Basics- Please Help!

Choose either homogeneous or heterogeneous. Tea: homogenous Concrete: heterogeneous Soda: homogeneous Soapy Water: homogeneous Salt Water: homogeneous Granite: heterogeneous Please help, and thanks lots 😀

asked by Anonymous on March 3, 2015

Chemistyr 152

Given the following data, what is the value of delta Gf (in kJ) for N2O4 (g) at 25C. N2O4(g)—–2NO2(g) Keq= 0.144 delta Gf: ? 51.30 I thought of using the equation: delta G-RTlnQ I am not sure if that’s what I should use to find N2O4 though???? Choose

asked by Car on July 3, 2010

Chemistry

92.01 grams of N2O4 (g) is placed in a container and allowed to dissociate. N2O4 (g) –> 2NO2 (g) The mixture of N2O4 and NO2 resulting from the reaction occupies 36.0 liters at a total pressure of 773 mmHg and 45 °C. A. Let x equal the moles of N2O4 that

asked by Neha on August 4, 2011

Algebra

when writing linear equations, how do you determine which form of a line to use? choose 1 set of points from the choices below. then, solve the problem and post your solution, showing your steps. write an equation in point-slope form for the line that

asked by Faith on December 9, 2014

Algebra

Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want

asked by Anonymous on December 6, 2013

chemistry

Can you please check if I came up with the right answer for this please. A 4.30L container had 55.10 moles of N2O4 added to it. When equilibrium was established the concentration of N2O4 was found to be 1.69M.What is the Kc for the following reaction?

asked by Andy on May 10, 2010

Chemistry

Dinitrogen tetroxide decomposes to nitrogen dioxide: N2O4 (g) —> 2NO2 (g) Delta H rxn: 55.3 kJ At 298 K a reaction vessel initially containing .100 atm of N2O4. When equilibrium is reached, 58% of the N2O4 has decomposed to NO2. -What percentage of N2O4

asked by Tyler on July 18, 2011

Chemistry

Dinitrogen tetroxide decomposes to nitrogen dioxide: N2O4(g)→2NO2(g)ΔHorxn=55.3kJ At 298 K, a reaction vessel initially contains 0.100 atm of N2O4. When equilibrium is reached, 58% of the N2O4 has decomposed to NO2. What percentage of N2O4 decomposes at

asked by Justiss on April 21, 2017

Math

Part 1: When writing linear equations, how do you determine which form of a line to use? Part 2: Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for

asked by Katie on January 8, 2014

chemistry

A fuel mixture used in the early days of rocketry is composed of two liquids, hydrazine (N2H4) and dinitrogen tetraoxide (N2O4), which ignite on contact to form nitrogen gas and water vapor. 2 N2H4 + N2O4 –> 3 N2 + 6 H2O If 1.50 x 102 g of N2H4 and 2.00 x

asked by Sheree’ on November 4, 2012

math

can someone answer these ive been stuck on them for almost 2 hours !!!!! 1.which pair of ratio form a proportion? choose all that apply. A. 1/6, 4/20 B. 7/9, 28/36 C. 14/18, 21/27 D. 30/80, 8/18 2.which pair of ratios does not form a proportion? A. 3/5,

asked by annabelle on January 23, 2014

Math-Algebra 1

Part 1: When writing linear equations, how do you determine which form of a line to use? Part 2: Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for

asked by Gabby on November 23, 2013

Chemistry

What are some examples of homogeneous and heterogeneous substances?

asked by Savannah on August 19, 2008

MATH !!!

PLEASE ANSWER THESE 3 I BEEN STUCK ON ALL DAY AND IM SICK OF THEM JUST WANNA SLEEP..PLEASE LABEL ANSWER WITH A B C D ! 1.which pair of ratio form a proportion? choose all that apply. A. 1/6, 4/20 B. 7/9, 28/36 C. 14/18, 21/27 D. 30/80, 8/18 2.which pair of

asked by annabelle on January 24, 2014

Chemistry

When heated, N2O4 dissociates as follows: N2O4 =2NO2 A flask initially contians .560 M N2O4. at this temperature, Kc is 4.00. what is the equilibrium concentration of NO2?

asked by Rob on November 4, 2010

Chemistry

Calculate the rate at which N2O4 is formed in the following reaction at the moment in time when NO2 is being consumed at a rate of 0.0521 M/s. 2NO2(g) N2O4 (g) I am not really sure how to go about this problem. rate = k (N2O4) d(NO2)/dt = -2 d(N2O4)/dt

asked by Martin on May 19, 2009

physical science

which of the following are pure substances? a. solutions b. compounds c. homogeneous mixtures d. colloids A?

asked by jenna on December 8, 2017

Science

The substances in a(n) **_** mixture are usually easily seen and separated. A) homogeneous B) heterogeneous C) uniform D) umcontaminated

asked by Grace on February 8, 2019

chemistry

calculate Ke for the following (equilibrium concentrations given below substances) N2O4(g)+heat yields 2NO2(g) [.0325] [.022] Thank you!

asked by mary on January 18, 2010

Chemistry

Consider the following chemical equation: 2NO2–>N2O4 If 25.0mL of NO2 gas is completely converted to N2O4 gas under the same conditions, what volume will the N2O4 occupy?

asked by Victoria on July 2, 2010

chemistry

A 1.00 mol sample of N2O4 (g) is placed in a 10.0 L vessel and allowed to reach equilibrium accourding to the equation N2O4(g) 2NO2(g) K = .0004 Calculate the equilibrium concentrations of N2O4(g) and NO2(g)

asked by kevin on September 19, 2011

college chem

N2O4 —>2NO2 a 1 liter flask is charged with .4 mols of N2O4. at equilibrium at 373 k, .0055 mols of N2O4 remain. what is the Kc for this reaction? please explain to me how to get the rate law for this and solving

asked by josh on March 9, 2010

science

what is a mineral? noun: solid homogeneous inorganic substances occurring in nature having a definite chemical composition

asked by jack on November 7, 2006

Chemistry

Having some confusion with this question….I have the answers, just not able to reach them. A flask of volume 5L is evacuated and 43.8 g of solid N2O4 is introduced at 77K. The sample is then warmed to 298K during which the N2O4 vaporizes and some

asked by Val on April 24, 2010

chemistry

Kc=5.85×10^-3 at 25 degrees C for the reaction N2O4(g)2NO2(g) fifteen(15.0) grams of N2O4 is confined in a 5.00-L flask at 25 degrees C. Calculate(a) the number of moles of NO2 present at equilibrium and(b) the percentage of the original N2O4 that is

asked by confused on April 14, 2010

Math

There are 22 gloves in a drawer. 5 brown pair, 4 green pair, and 2 blue pair. If you had the reach into the drawer and it was dark, how many must you choose to ensure that you have a matching pair?

asked by Rachel on October 20, 2013

chemistry

Liquid Nitrogen tetroxide, N2O4(l), was used as a fuel in Apollo missions to the moon. In a closed container the gas N2O4(g) decomposes to nitrogen dioxide, NO2(g). The equilibrium constant,k, for this reaction is 0.87 at 55 degrees Celsius. A vessel

asked by Claus on April 3, 2008

CHM

Given the initial concentrations of 0.10 atm NO2 and 0.10 atm N2O4 in a 1.0 L flask, what will be the equilibrium partial pressure of NO2? N2O4(g)=2NO2 Kp=0.660at319K Choose one answer. a. 0.10 atm b. 0.31 atm c. 0.045 atm d. 0.72 atm e. 0.19 atm

asked by AMI on March 28, 2010

physical science

Does not settle on standing: I answered homogeneous mixture – solution and compound is this correct? Can separate when allowed to stand alone I answered heterogenous mixture * choices solution, compund, heterogenous mixture and homogeneous mixture

asked by liz on October 6, 2007

Math

Which pair of ratios can form a true proportion? A: 7/4,21/12 (I CHOOSE THIS) B: 6/3,5/6 C: 7/10,6/7 D: 3/5,7/12 Pls help

asked by MATH HELP FAST PLS on December 13, 2015

Math

Which pair of ratios can form a true proportion? A: 7/4,21/12 (I CHOOSE THIS) B: 6/3,5/6 C: 7/10,6/7 D: 3/5,7/12 Pls help

asked by MATH HELP FAST PLS on December 12, 2015

CHEMISTRY

A chemist studying the equilibrium N2O4(g)2NO2(g) controls the temperature so that keq ( equilibrium constant)= 0.028. At one equilibrium position, the concentration of N2O4 is 1.5 times greater than the concentration of NO2. Find the concentrations of the

asked by Anonymous on November 26, 2013

chemistry

calculate Ke for the following(equilibrium concertations given below substances H2(g) + Br(g)=2 Br+heat, N2O4(g) + heat= NO2(G)

asked by jessica on June 1, 2010

chemistry

From each pair of substances below, choose the one with the higher molar So, at 298 K a) Hg (s), Hg (l) d) C2H6 (g), C2H4 (g) b) HI (g), HCl (g) e) H2 (1 atm), H2 (2 atm), 1 mol at 298 K c) NH3 (g), Ne (g) f) NaCl(s), NaCl (aq)

asked by Jaline on January 29, 2017

algebra

Choose the equation in slope-intercept form for the line passing through each pair of points (1/2, 1) and 1, 5) y=1/8x+39/8 y=1/2x+9/2 y=2x+3 y=8x-3 (*)

asked by ragan on September 25, 2012

algebra II

Choose the equation in slope-intercept form for the line passing through each pair of points. (-4, -2) and (2, 3) y=-5/6x+14/3, or y=5/6x+4/3

asked by Mark on September 25, 2012

chemistry

Take a cup of water, add sugar, and stir. If the resulting solution contains sugar crystals that do not dissolve, the solution is said to be? a)an unsaturated solution b)a saturated solution c)a homogeneous solution d)none of the above Is it d –

asked by Thelma on July 23, 2010

Chemistry, Solutions

Two or more combined substances that do not react form a ** _**. solution mixture substance compound

asked by Jason on September 16, 2010

math(check answers)

please check my math ANSWERS 1.which pair of ratio form a proportion? choose all that apply. A. 1/6, 4/20 B. 7/9, 28/36(I PICK THIS) C. 14/18, 21/27 D. 30/80, 8/18 2.which pair of ratios does not form a proportion? A. 3/5, 24/40 B. 30/10, 15/3(I PICK THIS)

asked by Matt on January 24, 2014

chemistry

Given the following thermochemical equations, NO(g) + (1/2) Cl2(g) –> NOCl(g) -37.78 kJ (per mol NOCl) NO(g) + (1/2) O2(g) –> NO2(g) -56.53 kJ (per mol NO2) 2 NO2(g) –> N2O4(g) -58.03 kJ (per mol N2O4) what is the standard enthalpy change for the

asked by abby on March 1, 2014

chemistry

Given the following thermochemical equations, NO(g) + (1/2) Cl2(g) –> NOCl(g) -37.78 kJ (per mol NOCl) NO(g) + (1/2) O2(g) –> NO2(g) -56.53 kJ (per mol NO2) 2 NO2(g) –> N2O4(g) -58.03 kJ (per mol N2O4) what is the standard enthalpy change for the

asked by abby on March 5, 2014

science

The equilibrium constant for the gas phase reaction N2O4 ⇀↽ 2 NO2 at a certain temperature is K = 0.0466. If the initial concentrations are [N2O4] = 1.0 M, [NO2] = 0.0 M, what are the final concentrations of [N2O4] and [NO2], respectively? 1. 1.0 M ;

asked by cora on February 1, 2016

Chemistry

Calcium carbonate is insoluble in water. Name two substances that when mixed in solution, will form a precipitate of calcium carbonate. Explain why is it the two substances that you have chosen. why does magnesium chloride cannot be prepared in the lab

asked by StuartKess on September 6, 2011

algebra

Which of the following ordered pairs is included in the solution set of the system, y < 2 – 2x and y > 2x -3? (4, 0) (0, 0) No Solution (3, 4) 2. Choose all correct answers. Which of the following are solutions of the system? x < 3 and x + y < 5 (2, 2) (4,

asked by Andrean on May 4, 2014

chemistry

The following system is at equilibrium with [N2O4] = 0.55 M and [NO2] = 0.25 M. If an additional 0.10 M NO2 is added to the reaction mixture with no change in volume, what will be the new equilibrium concentration of N2O4? N2O4(g) 2 NO2(g)

asked by Audrey on November 15, 2010

Chem 2

The following system is at equilibrium with [N2O4] = 0.55 M and [NO2] = 0.25 M. If an additional 0.10 M NO2 is added to the reaction mixture with no change in volume, what will be the new equilibrium concentration of N2O4? N2O4(g) 2 NO2(g)

asked by Beth on March 5, 2012

chemistry

Nitrogen dioxide (NO2) cannot be obtained in a pure form in the gas phase because it exists as a mixture of NO2 and N2O4. At 23°C and 0.94 atm, the density of this gas mixture is 2.6 g/L. What is the partial pressure of each gas? NO2 N2O4

asked by Kailee on November 18, 2012

chemistry

A reaction mixture of N2O4 and NO2 absorbs the heat given off in the combustion of 6.35 L CH4 measured at 24.7 C and 812 Torr. How many moles of N2O4 can be converted to NO2 as a result? CH4 + 2O2 –> CO2 + 2H2O Delta H = -890.3 KJ N2O4 –> 2NO2 Delta H =

asked by maddie on March 22, 2016

AP Chemistry

Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations

asked by Frank on April 22, 2010

Chemistry

Okay, I feel like this question should be really easy because it’s a multiple choice question but how do you figure it out?? I’m completely drawing a blank. Consider the following equilibrium N2O4(g) 2NO2(g) Kc = 4.8E-3 Which set of concentrations

asked by a Canadian on April 9, 2013

Chemistry

Nitrogen dioxide, NO2, dimerizes easily to form dinitrogen tetroxide , N2O4 : 2NO2N2O4 a) Calculate Change in reaction G* and K for this equilibrium. b) Calculate the (e) (the measure of the progress of the reaction) for this equilibrium if 1.00 mol NO2

asked by Jenna on October 20, 2011

cHEM

cThe price of gold is $625 per troy ounce at this writing. How much heat (in J) is needed to raise the temperature of $5000.00 worth of gold from 29.5 oC to 70.5 oC? (1 troy oz = 31.10 g and the specific heat of Au is 25.42 J/(moloC).) I got 5.125, which

asked by Anonymous on October 19, 2012

chemistry

Dinitrogen tetroxide decomposes to form nitrogen dioxide in a second order reaction: N2O4(g)-> 2NO2(g) At 400K, the rate constant for this reaction has been measured to be 2.9×10^8 L/mol*s.suppose 0.222 mol of N2O4(g) is placed in a sealed 41.7L container

asked by Anonymous on April 22, 2014

math – pls check!!!

Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want to work with). Then, use the same set of points to write the equation in standard form and again in

asked by SkatingDJ on January 13, 2015

chem 12

1.00 mol of N2O4 and 1.00 mol of NO2 are placed in an 800 mL container. Calculate the initial concentrations of each gas. N2O4= 1.25 mol/L NO2=1.25 mol/L When equilibrium is reached, the concentration of NO2 increases by 0.50mol/L. Calculate the

asked by George on February 6, 2016

math

Solve this system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions 3a+5b=-19 5a-27b=145

asked by john on May 3, 2012

Chemistry

For the reaction N2O4(g)=2NO2(g), the value of K at 25 degrees XCelsius is 7.19*10^-3. Calculate N2O4 at equilibrium when NO2 =2.20 *10^122 mol/L?

asked by Amy on July 14, 2012

math algebra

Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. -a+b=-4 2a-3b=-2

asked by jorge on May 3, 2012

math

Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions x-y=4 3x-5=2

asked by ,algebra on May 2, 2012

MATH

Solve this system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions 2x-y=0 3x+y=5

asked by eric on May 3, 2012

math

Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. x-3y=5 2x-6y=10

asked by ,algebra on May 2, 2012

algebra 1

Solve this system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. 5x=y=15 3x+2y=9

asked by Anonymous on June 25, 2012

chemistry

Consider the following equation: N2O4(g)+ 2NO2(g) Kc= 5.8 x 10^-3 If the initial concentration of N2O4(g)= 0.040 M and the initial concentration of NO2(g) is 0 M, what is the equilibrium of concentration of N2O4(g)?

asked by Jim on July 3, 2010

Chemistry

I am currenty working on my AP Chem Summer Project, but I need a little help. Which of the following are pure substances, and which are homogeneous mixtures? a) sugar dissolved in water; b) tea and ice; c) french onion soup; d)mud; e) gasoline; f) carbon

asked by Samantha S. on June 23, 2011

Algebra

which ordered pair in the form (x, y) is a solution of this equation? (x+6)y=9 Possible Answers: A. (12,2) B. (3,1) C. (2,1) D. (4,1)

asked by Niki on January 22, 2016

Chemistry

The reaction N2O4(g) –>2NO2(g) has Kc = 0.133 at 25 °C. What is the NO2 concentration in a 5.00 liter flask if it contains 0.250 mol of N2O4 at equilibrium I know I set something equal to Kc?

asked by Anonymous on December 17, 2015

Chemistry

The equilibrium system N2O4(g) 2NO2(g) was established in a 1.00-liter vessel. Upon analysis, the following information was found: [NO2] = 0.500 M; [N2O4] = 0.0250 M. What is the value of Keq?

asked by Chiara on March 18, 2011

chemistry

The half-life for the first-order decomposition of is 1.3*10^-5. N2O4–> 2NO2 If N2O4 is introduced into an evacuated flask at a pressure of 17.0 mmHg , how many seconds are required for the pressure of NO2 to reach 1.4mmHg ? i know that the half life

asked by Anonymous on February 1, 2011

science

Which of the following substances are homogeneous and which are heterogeneous? Blood, carbon dioxide gas, solid carbon dioxide, rock, steak, iron, rust, concrete, air, oxygen, salt, milk.

asked by Sheryl on October 17, 2011

science

Which of the following methods separates a homogeneous solution by spinning the solution very fast? ik its not ‘D’ i got it wrong on my test a. Evaporation and distillation b. Filtration c. Centrifuge d. Magnetism So i think its A

asked by Dweah50 on December 14, 2018

Algebra help

Solve Rational Inequalities x^2-x-2/x^2+5x+6 2 …let’s choose 3. If we choose 3 for x, the result will be positive and not less than 0. Three of the tests work. If you are familiar with interval notation, the solution set can be written this way:

asked by Dee Williams on November 7, 2006

Discrete Math

True or False? Homogeneous linear recurrence equations are linear combinations of power functions. I think the answer is false because although a homogeneous linear recurrence equation is a linear combination, it is composed of constant coefficients.

asked by Sarah on May 31, 2013

chemistry

Much of the brown haze hanging over large cities is nitrogen dioxide, NO2(g). Nitrogen dioxide reacts to form dinitrogen tetroxide, N2O4(g), according to the equilibrium. 2NO2(g) N2O4(g) + 57.2 kJ (brown) (coulorless) Use this equilibrium to explain why

asked by ChemMaster98 on March 31, 2008

ALGEBRA

If a jeweller wishes to form 12 ounces oif 75%pure gold from substances that arev 60% AND 80% pure gold .How much of each substances must be mixed together to produce this?

asked by vincent on September 18, 2015

Algebra333333!!!

Choose the ordered pair that is a solution to the system of equations. 3x – y = 9 2x + y = 6 (3,0) (3,-18) (3,-1) (3,1) Once again add the two equations to get 5x = 15 Solve for x and substitute into either equation to find y.

asked by Margie on October 14, 2006

algebra

How do you write a real-world scenario that could be represented by the inequality 4x + 2y 40 and how are you supposed to choose one ordered pair that is a solution to the given inequality and explain what that ordered pair means in the context of your

asked by Ka’Sandra on August 11, 2010

Algebra 1

can anyone help! I have no clue how to do this.. PART 1: Use complete sentences to describe a real-world scenario that could be represented by the inequality 5x + 2y 45. PART 2: Choose one ordered pair that is a solution to the given inequality and explain

asked by Vee on February 6, 2011

Algebra 1- Virtual School

can anyone help! I have no clue how to do this.. PART 1: Use complete sentences to describe a real-world scenario that could be represented by the inequality 5x + 2y 45. PART 2: Choose one ordered pair that is a solution to the given inequality and explain

asked by Vee on February 6, 2011

ORGANIC CHEMISTRY

WHAT ARE THE DEFINITION OF DRYING AGENT;DELIQUSCENT SUBSTANCES;HYGROSCOPIC SUBSTANCES;EFFLORESCENT SUBSTANCES.

asked by SAMIRA on February 10, 2012

Science

- Which of the following is true about mixtures? (1 point) Mixtures consist of two or more substances chemically combined. Mixtures cannot be separated by physical means. Mixtures consist of only one kind of atom. ***Mixtures have two or more substances

asked by TTR+S<3 on January 29, 2014

Algebra

- The table shows the heights in inches of trees after they have been planted. What is the height of a tree that is 64 in. Tall in its pot A. 42 in B. 52 in C. 60 in D. 76 in 3. Which ordered pair is a solution to y=8x A. 0,8 B. -1,8 C. 1.5,10 D. 2,16 4.

asked by Jason on October 13, 2016

Science

- Which of the following is true about mixtures? (1 point) Mixtures consist of two or more substances chemically combined. Mixtures cannot be separated by physical means. Mixtures consist of only one kind of atom. Mixtures have two or more substances

asked by Trover on January 25, 2016

Chemistry

At 55C, the K for the reaction: 2NO2(g) N2O4 is 1.15 a) write the equilibrium expression b) calculate the concentration of N2O4(g) present in equilibrium with 0.50 mole of NO2 Please help and explain

asked by Anonymous on April 8, 2012

Assignment help (chemistry)

in the reaction, N2O4–>2NO2, if the rate of formation of NO2 were 0.010 mol/L*s,, what would be the rate of decomposition for N2O4 Plz show steps thx

asked by Tarkan on November 10, 2011

english

- Choose the answer that displays the correct spelling of the plural form of the words in parentheses. How many (praying mantis) will we have to import to fight the (grasshopper)? 2. Choose the answer that displays the correct spelling of the plural form

asked by ashley on July 5, 2013

chemistry

Consider the equation: 2NO2(g) N2O4(g). Using ONLY the information given by the equation which of the following changes would increase the molar concentration at equilibrium of the product N2O4(g)?

asked by olivia jo on November 6, 2012

chemistry

2NO2(g)⇌N2O4(g). ΔH∘f for N2O4(g) is 9.16 kJ/mol.

asked by chad on April 9, 2017

chem

A flask is charged with 1.596 atm of N2O4(g) and 1.008 atm of NO2(g) at 25°C, and the following equilibrium is achieved. N2O4(g)-> 2 NO2(g) After equilibrium is reached, the partial pressure of NO2 is 0.504 atm. (a) What is the equilibrium partial

asked by Hannah on February 19, 2013

Algebra

Use substitution to determine whether the ordered pair (–2, –3) is a solution of the equation x2 – y = 7. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not.

asked by Jen on June 9, 2009

Algebra

Use substitution to determine whether the ordered pair (– 3, – 2) is a solution of the equation 5x + y2 = –11. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not.

asked by Math Loser 🙁 on October 29, 2010

math

the disney golf classic starts with 64 golfers.the golfers form pairs and each pair plays a match.the losers drop out and the winners of each pair then form new pairs and play again.then those winners form pairs and play.this continues until one wins.

asked by quan tanksley on November 8, 2012

math

Which of the following homogeneous systems have a nontrivial solution? 5x+ y + 5z =0 −2x + 2y− 4z = 0 4x− 3y + 6z = 0 can someone please explain how you know

asked by hannah on February 4, 2015

linear algebra

Which of the following homogeneous systems have a nontrivial solution? 5x+ y + 5z =0 −2x + 2y− 4z = 0 4x− 3y + 6z = 0 can someone please explain how you know

asked by sam on February 3, 2015

Algebra

Is (0,3) a solution to the equation y =x + 3 his is my teachers answer to my question of usage of the 2 numbers mentioned as possible solutions. yes it does make a difference. (4,8) is called an ordered pair. Ordered pairs are always in the form (x,y) That

asked by Faye on August 26, 2014

Chemistry

The decomposition of dinitrogen tetroxide produces nitrogen dioxide: N2O4 (g) —> 2 NO2(g) ΔG°= 2.80 kJ/mol Find the minimum partial pressure of N2O4 at which the reaction is spontaneous if P(NO2)=2.00 bar and T=298 K.

asked by Kerrie on June 12, 2012

PLLZ!PLLZ help with math quick!!!!!

6.Suppose you have a drawer full of white, black, and yellow pairs of socks. If the probability of picking a white pair of socks is 4/9, and the probability of picking a black pair of socks is 7/18, what is the probability of picking a yellow pair of

asked by plz plz help, i will fail 7th grade if i fail this on February 6, 2017