Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Which of the following statements is TRUE for gases?
1.The temperature of a gas is inversely proportional to its pressure.
2.The volume of a gas is directly proportional to the pressure in torr.
3.The pressure of a gas is due to collisions of the gas molecules.

Accepted Answer

A)  1 only
B)  2 only
C)  3 only
D)  1 and 2 only
E)  1 and 3 onlyF) C) and E)
G) B) and D)

Question 3

What is the major component of the air we breathe?

Accepted Answer

A)  nitrogen
B)  oxygen
C)  argon
D)  carbon dioxide
E)  smogF) All of the above
G) C) and D)

Question 4

Gases are a collection of particles in constant,unpredictable motion.

Accepted Answer

A) True 
 B)False

Question 5

What is the final volume of a gas that initially occupies 2.50 L at 298 K and is subsequently heated to 321 K?

Accepted Answer

A)  2.69 L
B)  2.96 L
C)  2.23 L
D)  2.32 L
E)  none of the aboveF) A) and B)
G) A) and C)

Question 6

A "shielding gas" mixture of argon and carbon dioxide is sometimes used in welding to improve the strength of the weld.If a gas cylinder of this two-part mixture was at 4.0 atm pressure and this mixture was 90.% argon,what would be the pressure due to the carbon dioxide gas component?

Accepted Answer

A)  3.6 atm
B)  0.40 atm
C)  10.atm
D)  4.0 atm
E)  none of the aboveF) A) and B)
G) C) and D)

Question 7

The volume of a gas is independent of the temperature.

Accepted Answer

A) True 
 B)False

Question 8

What is the molecular weight of a gas if a 15.0 g sample has a pressure of 836 mm Hg at 25°C in a 2.00 L flask? (R= 0.0821 L atm/ mol K)

Accepted Answer

A)  176 amu
B)  1.35 amu
C)  167 amu
D)  11.1 amu
E)  none of the aboveF) A) and B)
G) A) and C)

Question 9

A gas sample occupies 3.50 liters of volume at 20.°C.What volume will this gas occupy at 100.°C (reported to three significant figures) ?

Accepted Answer

A)  0.224 L
B)  2.75 L
C)  4.46 L
D)  17.5 L
E)  none of the aboveF) None of the above
G) A) and E)

Question 10

The molar volume of any gas at conditions of standard temperature and pressure is 22.4 liters.

Accepted Answer

A) True 
 B)False

Question 11

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 12

1 atm is equal to:

Accepted Answer

A)  760 mm Hg.
B)  760 torr.
C)  101,325 Pa.
D)  14.7 psi.
E)  all of the aboveF) A) and C)
G) B) and E)

Question 13

Which conditions can cause nonideal gas behavior by 1) decreasing the space between gas particles or 2) by slowing gas particles so that interactions are significant?

Accepted Answer

A)  1) high pressure;2) high temperature
B)  1) high pressure;2) low temperature
C)  1) low pressure;2) high temperature
D)  1) low pressure ;2) low temperature
E)  none of the aboveF) A) and D)
G) B) and C)

Question 14

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 aboveF) A) and D)
G) B) and D)

Question 15

If the column of mercury in a barometer drops to a lower reading,this means the measured pressure has decreased.

Accepted Answer

A) True 
 B)False

Question 16

If the initial pressure of a system was 1.00 atm and the volume was halved and the temperature was tripled,what is the final pressure?

Accepted Answer

A)  2.00 atm
B)  0.667 atm
C)  1.50 atm
D)  6.00 atm
E)  not enough informationF) A) and D)
G) D) and E)

Question 17

Vapor pressure of water increases with increasing temperature because the higher temperature causes more water molecules to evaporate.

Accepted Answer

A) True 
 B)False

Question 18

There is a large distance between gas particles as compared to their relative size.

Accepted Answer

A) True 
 B)False

Question 19

All of the following statements are consistent with the kinetic molecular theory of gases EXCEPT

Accepted Answer

A)  The size of the gas molecules is negligible compared to the total volume of the gas.
B)  The average kinetic energy of the molecules of a gas is proportional to the temperature of the gas in kelvins.
C)  The gas molecules collide with each other and with the surfaces around them.
D)  Strong attractive forces hold the gas molecules together.
E)  none of the aboveF) B) and C)
G) B) and E)

Question 20

What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature was determined to be 255.0°C?

Accepted Answer

A)  480°C
B)  -41°C
C)  232°C
D)  207°C
E)  none of the aboveF) B) and D)
G) All of the above

Exam 11: Gases

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

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

The molar volume of any gas at conditions of standard temperature and pressure is 22.4 liters.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the final volume of a gas that initially occupies 2.50 L at 298 K and is subsequently heated to 321 K?

Correct AnswerverifiedShow Answer

What is the major component of the air we breathe?

Correct AnswerverifiedShow Answer

If the initial pressure of a system was 1.00 atm and the volume was halved and the temperature was tripled,what is the final pressure?

Correct AnswerverifiedShow Answer

The volume of a gas is independent of the temperature.

Correct AnswerverifiedShow Answer

Gases are a collection of particles in constant,unpredictable motion.

Correct AnswerverifiedShow Answer

A "shielding gas" mixture of argon and carbon dioxide is sometimes used in welding to improve the strength of the weld.If a gas cylinder of this two-part mixture was at 4.0 atm pressure and this mixture was 90.% argon,what would be the pressure due to the carbon dioxide gas component?

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE for gases? 1.The temperature of a gas is inversely proportional to its pressure. 2.The volume of a gas is directly proportional to the pressure in torr. 3.The pressure of a gas is due to collisions of the gas molecules.

Correct AnswerverifiedShow Answer

Which conditions can cause nonideal gas behavior by 1) decreasing the space between gas particles or 2) by slowing gas particles so that interactions are significant?

Correct AnswerverifiedShow Answer

1 atm is equal to:

Correct AnswerverifiedShow Answer

A gas sample occupies 3.50 liters of volume at 20.°C.What volume will this gas occupy at 100.°C (reported to three significant figures) ?

Correct AnswerverifiedShow Answer

There is a large distance between gas particles as compared to their relative size.

Correct AnswerverifiedShow Answer

All of the following statements are consistent with the kinetic molecular theory of gases EXCEPT

Correct AnswerverifiedShow Answer

What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature was determined to be 255.0°C?

Correct AnswerverifiedShow Answer

If the column of mercury in a barometer drops to a lower reading,this means the measured pressure has decreased.

Correct AnswerverifiedShow Answer

What is the molecular weight of a gas if a 15.0 g sample has a pressure of 836 mm Hg at 25°C in a 2.00 L flask? (R= 0.0821 L atm/ mol K)

Correct AnswerverifiedShow Answer

Vapor pressure of water increases with increasing temperature because the higher temperature causes more water molecules to evaporate.

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 Answer
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