Question 1

A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C.If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr,what will be the new temperature of the gas (reported to three significant figures in °C) ?

Accepted Answer

A)  35.2°C
B)  335°C
C)  62.4°C
D)  215°C
E)  none of the above

Question 2

If the number of gas particles is tripled,the volume will be 1/3 of the original given that temperature and pressure do not change.

Accepted Answer

A) True 
 B)False

Question 3

What happens to the volume of a gas when you double the number of moles of gas while keeping the temperature and pressure constant?

Accepted Answer

A)  The volume is halved.
B)  The volume doubles.
C)  The volume decreases,but more information is needed.
D)  The volume increases,but more information is needed.
E)  none of the above

Question 4

If each of the following gas samples have the same temperature and pressure,which sample has the greatest volume?

Accepted Answer

A)  1 gram of O2
B)  1 gram of Ar
C)  1 gram of H2
D)  all have the same volume
E)  not enough information

Question 5

A rigid cylinder contains 2.00 liters of gas at a temperature of 25°C.If the pressure of this gas is changed from 0.500 atmospheres to 1.50 atmospheres,what will be the new temperature (in Kelvin,reported to three significant figures) of the gas? (The volume is constant. )

Accepted Answer

A)  99.3 K
B)  75.0 K
C)  8.33 K
D)  894 K
E)  none of the above

Question 6

Boyle's law states that as the volume of a gas increases so does the pressure.

Accepted Answer

A) True 
 B)False

Question 7

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 above

Question 8

If a slow leak in an inner tube has reduced the volume of the tube to one-third its original inflated volume,this means that one-third of the moles of gas have escaped the tube.(Assume constant temperature and pressure. )

Accepted Answer

A) True 
 B)False

Question 9

What is the equivalent pressure of 968 mm Hg in units of atm?

Accepted Answer

A)  1.27 atm
B)  0.785 atm
C)  968 atm
D)  1.30 atm
E)  none of the above

Question 10

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 above

Question 11

When must temperature values in gas law calculations be expressed in kelvin units?

Accepted Answer

A)  only for Charles's law
B)  only for the Ideal Gas law
C)  only for the Combined Gas law
D)  never
E)  always

Question 12

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.

Question 13

Pressure is calculated by: P =  
.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

What is the final volume of a gas that initially occupies 2.50 L at 
And is subsequently heated to

Accepted Answer

A)  2.69 L
B)  2.96 L
C)  2.23 L
D)  2.32 L
E)  none of the above

Question 16

A certain volume of gas was confined in a rigid container.If the pressure of the gas sample in the container was doubled,what happened to the temperature?

Accepted Answer

A)  The Kelvin temperature decreased by one-half.
B)  The Kelvin temperature doubled.
C)  The Kelvin temperature increased four times.
D)  The Kelvin temperature decreased one-third.
E)  not enough information

Question 17

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.

Question 18

A gas may not behave ideally under conditions of low pressure or high temperature.

Accepted Answer

A) True 
 B)False

Question 19

Water can be formed according to the equation:
2H2 (g) + O2 (g) → 2H2O (g) 
If 8.0 L of hydrogen is reacted at STP,exactly how many liters of oxygen at STP would be needed to allow complete reaction?

Accepted Answer

A)  4.0 L
B)  2.0 L
C)  1.0 L
D)  8.0 L
E)  none of the above

Question 20

What is the third most abundant component of dry air?

Accepted Answer

A)  carbon dioxide
B)  oxygen
C)  nitrogen
D)  argon
E)  smog

Exam 11: Gases

If a slow leak in an inner tube has reduced the volume of the tube to one-third its original inflated volume,this means that one-third of the moles of gas have escaped the tube.(Assume constant temperature and pressure. )

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the final volume of a gas that initially occupies 2.50 L at And is subsequently heated to

Correct AnswerverifiedShow Answer

When must temperature values in gas law calculations be expressed in kelvin units?

Correct AnswerverifiedShow Answer

A gas may not behave ideally under conditions of low pressure or high temperature.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Pressure is calculated by: P = .

Correct AnswerverifiedShow Answer

If each of the following gas samples have the same temperature and pressure,which sample has the greatest volume?

Correct AnswerverifiedShow Answer

Boyle's law states that as the volume of a gas increases so does the pressure.

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

Water can be formed according to the equation: 2H2 (g) + O2 (g) → 2H2O (g) If 8.0 L of hydrogen is reacted at STP,exactly how many liters of oxygen at STP would be needed to allow complete reaction?

Correct AnswerverifiedShow Answer

A certain volume of gas was confined in a rigid container.If the pressure of the gas sample in the container was doubled,what happened to the temperature?

Correct AnswerverifiedShow Answer

A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C.If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr,what will be the new temperature of the gas (reported to three significant figures in °C) ?

Correct AnswerverifiedShow Answer

If the number of gas particles is tripled,the volume will be 1/3 of the original given that temperature and pressure do not change.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A rigid cylinder contains 2.00 liters of gas at a temperature of 25°C.If the pressure of this gas is changed from 0.500 atmospheres to 1.50 atmospheres,what will be the new temperature (in Kelvin,reported to three significant figures) of the gas? (The volume is constant. )

Correct AnswerverifiedShow Answer

Which of the following statements about pressure is FALSE?

Correct AnswerverifiedShow Answer

What is the third most abundant component of dry air?

Correct AnswerverifiedShow Answer

What happens to the volume of a gas when you double the number of moles of gas while keeping the temperature and pressure constant?

Correct AnswerverifiedShow Answer

What is the equivalent pressure of 968 mm Hg in units of atm?

Correct AnswerverifiedShow Answer

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Water can be formed according to the equation: 2H₂(g) + O₂ (g) → 2H₂O (g) If 8.0 L of hydrogen is reacted at STP,exactly how many liters of oxygen at STP would be needed to allow complete reaction?

Correct Answer
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