Question 1

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

Accepted Answer

A)  10.2 atm
B)  9.83 atm
C)  15.3 atm
D)  6.53 atm
E)  1.05 atmF) B) and D)
G) A) and B)

Question 2

A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg.What volume of gas will the balloon contain at 1.35 atm and 253 K?

Accepted Answer

A)  22.2 L
B)  87.5 L
C)  11.4 L
D)  45.0 L
E)  58.6 LF) A) and E)
G) B) and C)

Question 3

Which gas sample has the greatest volume at STP?

Accepted Answer

A)  4 g of H2 
B)  32 g of O2
C)  18 g of Ar
D)  4 g of HeE) None of the above
F) B) and C)

Question 4

Define diffusion.

Accepted Answer

Diffusion is the process by wh...

Question 5

What is the mole fraction of CO in a container with a H2 mole fraction of 0.22 and an O2 mole fraction of 0.58?

Accepted Answer

A)  0.20
B)  0.30
C)  0.10
D)  0.50E) All of the above
F) A) and B)

Question 6

A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm.What is the identity of the halogen?

Accepted Answer

A)  Br2
B)  F2
C)  Cl2
D)  I2
E)  GeF) A) and E)
G) C) and D)

Question 7

Which of the following samples will have the greatest average speed at 355 K?

Accepted Answer

A)  Ne
B)  C2H4
C)  Cl2
D)  CH4
E)  All of these samples will have the same average speed at the same temperature.F) B) and D)
G) None of the above

Question 8

Which is not an assumption in the kinetic molecular theory for gases?

Accepted Answer

A)  The volume occupied the gas molecules is negligible compared to the volume of the container.
B)  The average kinetic energy of gas molecules is proportional to the Kelvin temperature
C)  The collision of one gas molecule with another (or with the walls) is completely elastic.
D)  Gas molecules attract each otherE) None of the above
F) B) and C)

Question 9

Zinc reacts with aqueous sulfuric acid to form hydrogen gas:
Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) 
In an experiment,225 mL of wet H2 is collected over water at 27°C and a barometric pressure of 748 torr.How many grams of Zn have been consumed? The vapor pressure of water at 27°C is 26.74 torr.

Accepted Answer

A)  4.79 × 106
B)  0.567
C)  567
D)  431
E)  4.31 × 105F) A) and E)
G) A) and B)

Question 10

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N2 at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

Accepted Answer

A)  0.59 atm
B)  1.1 atm
C)  1.7 atm
D)  1.9 atm
E)  3.8 atmF) A) and B)
G) B) and E)

Question 11

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same V) ?

Accepted Answer

A)  15 g F2
B)  15 g Ne
C)  15 g Kr
D)  15 g CO2
E)  All of these samples will have the same pressure.F) B) and E)
G) All of the above

Question 12

In Boyle's Law,

Accepted Answer

A)  volume is inversely proportional to pressure.
B)  volume is proportional to pressure.
C)  pressure is inversely proportional to temperature.
D)  volume is proportional to temperature.E) A) and B)
F) A) and C)

Question 13

Identify the molecule that effuses the fastest.

Accepted Answer

A)  CO
B)  Ar
C)  CH4
D)  CO2E) B) and D)
F) B) and C)

Question 14

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below?
O3(g) + 2 I-(aq) + H2O(l) → O2(g) + I2(s) + 2 OH-(aq)

Accepted Answer

A)  55.0 mL
B)  110.mL
C)  165 mL
D)  220.mLE) B) and C)
F) A) and C)

Question 15

A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L) the gas will occupy when the temperature is increased to 121°C while maintaining the pressure at 629 torr.

Accepted Answer

A)  10.9 L
B)  13.2 L
C)  2.07 L
D)  7.56 L
E)  48.4 LF) A) and B)
G) A) and E)

Question 16

Determine the mass of water formed when 12.5 L NH3 (at 298 K and 1.50 atm) is reacted with 18.9 L of O2 (at 323 K and 1.1 atm) .
4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

Accepted Answer

A)  17.0 g H2O
B)  20.7 g H2O
C)  37.7 g H2O
D)  13.8 g H2O
E)  27.9 g H2OF) A) and C)
G) C) and D)

Question 17

A sample of air from a home is found to contain 6.2 ppm of carbon monoxide.This means that if the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

Accepted Answer

A)  4.3 × 103
B)  4.3 × 10-3
C)  4.3
D)  8.9 × 103
E)  1.1 × 108F) C) and D)
G) B) and C)

Exam 5: Gases

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same V) ?

Correct Answer
verified

A sample of air from a home is found to contain 6.2 ppm of carbon monoxide.This means that if the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

Correct Answer
verified

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N₂ at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

Correct Answer
verified

Define diffusion.

Correct Answer
verified
Diffusion is the process by wh...
View Answer

Which gas sample has the greatest volume at STP?

Correct Answer
verified

Correct Answer
verified

What is the mole fraction of CO in a container with a H₂ mole fraction of 0.22 and an O₂ mole fraction of 0.58?

Correct Answer
verified

A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L) the gas will occupy when the temperature is increased to 121°C while maintaining the pressure at 629 torr.

Correct Answer
verified

Identify the molecule that effuses the fastest.

Correct Answer
verified

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below? O₃(g) + 2 I^-(aq) + H₂O(l) → O₂(g) + I₂(s) + 2 OH^-(aq)

Correct Answer
verified

In Boyle's Law,

Correct Answer
verified

Which of the following samples will have the greatest average speed at 355 K?

Correct Answer
verified

A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm.What is the identity of the halogen?

Correct Answer
verified

Which is not an assumption in the kinetic molecular theory for gases?

Correct Answer
verified

Determine the mass of water formed when 12.5 L NH₃ (at 298 K and 1.50 atm) is reacted with 18.9 L of O₂ (at 323 K and 1.1 atm) . 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)

Correct Answer
verified

A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg.What volume of gas will the balloon contain at 1.35 atm and 253 K?

Correct Answer
verified

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

Correct Answer
verified

Exam 5: Gases

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same V) ?

Correct AnswerverifiedShow Answer

A sample of air from a home is found to contain 6.2 ppm of carbon monoxide.This means that if the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

Correct AnswerverifiedShow Answer

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N2 at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

Correct AnswerverifiedShow Answer

Define diffusion.

Correct AnswerverifiedDiffusion is the process by wh...View AnswerShow Answer

Which gas sample has the greatest volume at STP?

Correct AnswerverifiedShow Answer

Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) In an experiment,225 mL of wet H2 is collected over water at 27°C and a barometric pressure of 748 torr.How many grams of Zn have been consumed? The vapor pressure of water at 27°C is 26.74 torr.

Correct AnswerverifiedShow Answer

What is the mole fraction of CO in a container with a H2 mole fraction of 0.22 and an O2 mole fraction of 0.58?

Correct AnswerverifiedShow Answer

A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L) the gas will occupy when the temperature is increased to 121°C while maintaining the pressure at 629 torr.

Correct AnswerverifiedShow Answer

Identify the molecule that effuses the fastest.

Correct AnswerverifiedShow Answer

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below? O3(g) + 2 I-(aq) + H2O(l) → O2(g) + I2(s) + 2 OH-(aq)

Correct AnswerverifiedShow Answer

In Boyle's Law,

Correct AnswerverifiedShow Answer

Which of the following samples will have the greatest average speed at 355 K?

Correct AnswerverifiedShow Answer

A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm.What is the identity of the halogen?

Correct AnswerverifiedShow Answer

Which is not an assumption in the kinetic molecular theory for gases?

Correct AnswerverifiedShow Answer

Determine the mass of water formed when 12.5 L NH3 (at 298 K and 1.50 atm) is reacted with 18.9 L of O2 (at 323 K and 1.1 atm) . 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

Correct AnswerverifiedShow Answer

A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg.What volume of gas will the balloon contain at 1.35 atm and 253 K?

Correct AnswerverifiedShow Answer

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N₂ at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

Correct Answer
verified

Correct Answer
verified
Diffusion is the process by wh...
View Answer

Correct Answer
verified

Correct Answer
verified

What is the mole fraction of CO in a container with a H₂ mole fraction of 0.22 and an O₂ mole fraction of 0.58?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below? O₃(g) + 2 I^-(aq) + H₂O(l) → O₂(g) + I₂(s) + 2 OH^-(aq)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Determine the mass of water formed when 12.5 L NH₃ (at 298 K and 1.50 atm) is reacted with 18.9 L of O₂ (at 323 K and 1.1 atm) . 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified