Question 1

The initial volume of a gas cylinder is 750.0 mL.If the pressure of a gas inside the cylinder changes from
840.0 mm Hg to 360.0 mm Hg,what is the final volume the gas occupies?

Accepted Answer

A)  3.151 L
B)  630.0 mL
C)  1.750 L
D)  321.4 mL
E)  none of the aboveF) B) and C)
G) B) and E)

Question 2

The volume of a gas and the number of particles is inversely proportional.

Accepted Answer

A) True 
 B)False

Question 3

What is the equivalent pressure of 1520 torr in units of atm?

Accepted Answer

A)  203,000
B)  380.
C)  2.00
D)  1520
E)  none of the aboveF) C) and D)
G) None of the above

Question 4

What is the final pressure (atm) of a 3.05 L system initially at 724 mm Hg and 298 K that is compressed to a final volume of 2.51 L at 273 K?

Accepted Answer

A)  1.06
B)  1.60
C)  806
D)  860
E)  none of the aboveF) A) and B)
G) A) and C)

Question 5

The ideal gas law is:

Accepted Answer

A)  PV = nRT
B)  P = 
C)  T = 
D)  V = 
E)  All of the above are forms of the ideal gas law.F) B) and E)
G) A) and E)

Question 6

What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25°C?
(R= 0.0821 L atm/ mol K)

Accepted Answer

A)  147 atm
B)  36.7 atm
C)  32.6 atm
D)  1.81 atm
E)  none of the aboveF) A) and B)
G) A) and C)

Question 7

Avogadro's Law is expressed as:

Accepted Answer

A)  V is proportional to 
B)  P is proportional to n
C)  n is proportional to 
D)  V is proportional to n
E)  none of the aboveF) A) and C)
G) C) and E)

Question 8

If you had a five liter balloon of argon gas and a five liter balloon of xenon gas,and you removed 10 grams of gas from each balloon,the balloons would both shrink down to the same size.

Accepted Answer

A) True 
 B)False

Question 9

Using pure oxygen in scuba diving tanks is a good method of preventing the nitrogen bends.

Accepted Answer

A) True 
 B)False

Question 10

How many moles of gas were added to a balloon that started with 2.3 moles of gas and a volume of 1.4 L given that the final volume was 7.2 L?

Accepted Answer

A)  9.5
B)  4.4
C)  12
D)  0.085
E)  none of the aboveF) None of the above
G) A) and D)

Question 11

As you increase temperature,you increase the average energy of the gas particles.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following statements about pressure is FALSE?

Accepted Answer

A)  Pressure is caused by gas molecules colliding with surfaces.
B)  The atmosphere has a pressure as the components of air collide with surfaces.
C)  After creating a pressure difference,the atmospheric pressure can push liquid up a straw.
D)  A deep well dug in the ground must have the pump located at the bottom of well in order to have the water come to the surface.
E)  All of the above statements are true.F) B) and C)
G) A) and E)

Question 13

A sealed bag of potato chips will expand when taken to a higher altitude.This is an example of Boyle's law.

Accepted Answer

A) True 
 B)False

Question 14

What is the final volume of a 500.0 mL gas container that increased in temperature from 299 K to 333 K while the pressure increased from 1.00 atm to 1.54 atm?

Accepted Answer

A)  0.691 L
B)  2.77 L
C)  0.362 L
D)  1.45 L
E)  none of the aboveF) B) and E)
G) A) and B)

Question 15

Which of the following is NOT part of the Kinetic Molecular Theory?

Accepted Answer

A)  Gas particles do not repel each other.
B)  There is a large distance between gas particles as compared to their relative size.
C)  The size of the actual gas particles is small compared to the volume of the whole gas.
D)  The average energy of the particles is dependent on the molecular mass of the particle.
E)  All of the above statements are part of the Kinetic Molecular Theory.F) B) and D)
G) None of the above

Question 16

Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C.The barometric pressure at the time was 742.5 mm Hg.What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

Accepted Answer

A)  742.5 mm Hg
B)  718.7 mm Hg
C)  766.3 mm Hg
D)  760.0 mm Hg
E)  none of the aboveF) A) and B)
G) A) and C)

Question 17

If the number of moles of a gas initially contained in a 2.10 L vessel is doubled,what is the final volume of the gas in liters? (Assume the pressure and temperature remain constant. )

Accepted Answer

A)  6.30
B)  1.05
C)  4.20
D)  8.40
E)  none of the aboveF) A) and E)
G) All of the above

Question 18

At STP,12.69 g of a noble gas occupies 14.09 L.What is the identity of the noble gas?
(R= 0.0821 L atm/ mol K)

Accepted Answer

A)  He
B)  Ne
C)  Ar
D)  Kr
E)  not enough informationF) B) and D)
G) B) and C)

Question 19

How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g) ?
Given: CH4 (g) + 2O2 (g) → CO2 (g) + H2O (g)

Accepted Answer

A)  28.0 L
B)  56.0 L
C)  84.0 L
D)  112.L
E)  none of the aboveF) A) and D)
G) A) and E)

Question 20

A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C.What is the noble gas?
(R= 0.0821 L atm/ mol K)

Accepted Answer

A)  He
B)  Ne
C)  Ar
D)  Kr
E)  not enough informationF) A) and D)
G) C) and E)

Exam 11: Gases

How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g) ? Given: CH4 (g) + 2O2 (g) → CO2 (g) + H2O (g)

Correct AnswerverifiedShow Answer

A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C.What is the noble gas? (R= 0.0821 L atm/ mol K)

Correct AnswerverifiedShow Answer

The initial volume of a gas cylinder is 750.0 mL.If the pressure of a gas inside the cylinder changes from 840.0 mm Hg to 360.0 mm Hg,what is the final volume the gas occupies?

Correct AnswerverifiedShow Answer

Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C.The barometric pressure at the time was 742.5 mm Hg.What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

Correct AnswerverifiedShow Answer

Using pure oxygen in scuba diving tanks is a good method of preventing the nitrogen bends.

Correct AnswerverifiedShow Answer

Avogadro's Law is expressed as:

Correct AnswerverifiedShow Answer

As you increase temperature,you increase the average energy of the gas particles.

Correct AnswerverifiedShow Answer

What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25°C? (R= 0.0821 L atm/ mol K)

Correct AnswerverifiedShow Answer

If you had a five liter balloon of argon gas and a five liter balloon of xenon gas,and you removed 10 grams of gas from each balloon,the balloons would both shrink down to the same size.

Correct AnswerverifiedShow Answer

Which of the following statements about pressure is FALSE?

Correct AnswerverifiedShow Answer

At STP,12.69 g of a noble gas occupies 14.09 L.What is the identity of the noble gas? (R= 0.0821 L atm/ mol K)

Correct AnswerverifiedShow Answer

A sealed bag of potato chips will expand when taken to a higher altitude.This is an example of Boyle's law.

Correct AnswerverifiedShow Answer

How many moles of gas were added to a balloon that started with 2.3 moles of gas and a volume of 1.4 L given that the final volume was 7.2 L?

Correct AnswerverifiedShow Answer

What is the final pressure (atm) of a 3.05 L system initially at 724 mm Hg and 298 K that is compressed to a final volume of 2.51 L at 273 K?

Correct AnswerverifiedShow Answer

If the number of moles of a gas initially contained in a 2.10 L vessel is doubled,what is the final volume of the gas in liters? (Assume the pressure and temperature remain constant. )

Correct AnswerverifiedShow Answer

The ideal gas law is:

Correct AnswerverifiedShow Answer

What is the final volume of a 500.0 mL gas container that increased in temperature from 299 K to 333 K while the pressure increased from 1.00 atm to 1.54 atm?

Correct AnswerverifiedShow Answer

What is the equivalent pressure of 1520 torr in units of atm?

Correct AnswerverifiedShow Answer

Which of the following is NOT part of the Kinetic Molecular Theory?

Correct AnswerverifiedShow Answer

The volume of a gas and the number of particles is inversely proportional.

Correct AnswerverifiedShow Answer

How many liters of O₂ (g) are needed to react completely with 56.0 L of CH₄ (g) at STP to produce CO₂ (g) and H₂O (g) ? Given: CH₄ (g) + 2O₂ (g) → CO₂ (g) + H₂O (g)

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