Question 1

Nitrogen will behave most like an ideal gas

Accepted Answer

A)  at high temperature and high pressure.
B)  at high temperature and low pressure.
C)  at low temperature and high pressure.
D)  at low temperature and low pressure.
E)  at intermediate (moderate) temperature and pressure.F) A) and E)
G) A) and B)

Question 2

What is the pressure in a 7.50-L flask if 0.15 mol of carbon dioxide is added to 0.33 mol of oxygen? The temperature of the mixture is 48.0°C.

Accepted Answer

A)  0.252 atm
B)  0.592 atm
C)  1.69 atm
D)  3.96 atm
E)  4.80 atmF) A) and B)
G) All of the above

Question 3

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25°C?

Accepted Answer

A)  9.00 × 10 −2 atm
B)  0.933 atm
C)  1.11 atm
D)  1.70 atm
E)  11.1 atmF) B) and D)
G) A) and B)

Question 4

The ideal gas law tends to become inaccurate when

Accepted Answer

A)  the pressure is lowered and molecular interactions become significant.
B)  the pressure is raised and the temperature is lowered.
C)  the temperature is raised above the temperature of STP.
D)  large gas samples are involved.
E)  the volume expands beyond the standard molar volume.F) B) and D)
G) C) and E)

Question 5

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its Celsius temperature, other factors remaining constant?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) C) and D)
G) All of the above

Question 6

Freon-12, CF2Cl2, which has been widely used in air conditioning systems, is considered a threat to the ozone layer in the stratosphere. Calculate the root-mean-square velocity of Freon-12 molecules in the lower stratosphere where the temperature is −65°C.

Accepted Answer

A)  20 m/s
B)  120 m/s
C)  210 m/s
D)  260 m/s
E)  4.4 × 10 4 m/sF) C) and D)
G) All of the above

Question 7

For an ideal gas, a plot of PV/nRT versus P gives a straight line with a positive slope.

Accepted Answer

A) True 
 B)False

Question 8

What is the density of carbon dioxide gas at −25.2°C and 98.0 kPa?

Accepted Answer

A)  0.232 g/L
B)  0.279 g/L
C)  0.994 g/L
D)  1.74 g/L
E)  2.09 g/LF) B) and D)
G) A) and B)

Question 9

At what temperature in kelvin is the root mean square speed of helium atoms (atomic weight = 4.00)  equal to that of oxygen molecules (molecular weight = 32.00)  at 300. K?

Accepted Answer

A)  37.5 K
B)  75 K
C)  106 K
D)  292 K
E)  2400. KF) C) and D)
G) B) and C)

Question 10

Convert a gas pressure of 485 cmHg to atmospheres.

Accepted Answer

A)  0.64 atm
B)  33.0 atm
C)  6.38 atm
D)  5.50 atm
E)  6.46 atmF) A) and C)
G) All of the above

Question 11

Use the van der Waals equation for real gases to calculate the pressure exerted by 1.00 mole of ammonia at 27°C in a 750-mL container. (a = 4.17 L2·atm/mol2, b = 0.0371 L/mol)

Accepted Answer

A)  23.2 atm
B)  27.1 atm
C)  32.8 atm
D)  42.0 atm
E)  32.8 torrF) A) and D)
G) B) and C)

Question 12

The pressure of sulfur dioxide in a container is 159 kPa. What is this pressure in atmospheres?

Accepted Answer

A)  0.209 atm
B)  0.637 atm
C)  1.57 atm
D)  21.2 atm
E)  15900 atmF) C) and E)
G) A) and B)

Question 13

A flask containing helium gas is connected to an open-ended mercury manometer. The open end is exposed to the atmosphere, where the prevailing pressure is 752 torr. The mercury level in the open arm is 26 mm above that in the arm connected to the flask of helium. What is the helium pressure, in torr?

Accepted Answer

A)  −26 torr
B)  26 torr
C)  726 torr
D)  778 torr
E)  None of these choices are correct.F) A) and D)
G) B) and E)

Question 14

What are the conditions of STP?

Accepted Answer

A)  0 K and l atm
B)  273.15 K and 760 torr
C)  0°C and 760 atm
D)  273.15°C and 760 torr
E)  None of these choices are correct.F) B) and E)
G) None of the above

Question 15

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li2O(aq)  + CO2(g)  → Li2CO3(s)

Accepted Answer

A)  687 mL
B)  819 mL
C)  687 L
D)  819 L
E)  22.4 LF) A) and D)
G) A) and E)

Question 16

Methane, CH4(g) , reacts with steam to give synthesis gas, a mixture of carbon monoxide and hydrogen, which is used as starting material for the synthesis of a number of organic and inorganic compounds. CH4(g)  + H2O(g)  → CO(g)  + H2(g)  [unbalanced]
What mass of hydrogen is formed if 275 L of methane (measured at STP)  is converted to synthesis gas?

Accepted Answer

A)  12.3 g
B)  24.7 g
C)  37.1 g
D)  49.4 g
E)  74.2 gF) D) and E)
G) None of the above

Question 17

A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is −15.8°C and its pressure is 524 torr?

Accepted Answer

A)  3.69 L
B)  11.6 L
C)  20.2 L
D)  63.5 L
E)  Not possible, since the volume would have to be negativeF) A) and B)
G) A) and C)

Question 18

If 0.750 L of argon at 1.50 atm and 177°C and 0.235 L of sulfur dioxide at 95.0 kPa and 63.0°C are added to a 1.00-L flask and the flask's temperature is adjusted to 25.0°C, what is the resulting pressure in the flask?

Accepted Answer

A)  0.0851 atm
B)  0.244 atm
C)  0.946 atm
D)  1.74 atm
E)  1.86 atmF) A) and D)
G) A) and C)

Exam 5: Gases and the Kinetic-Molecular Theory

Correct Answer
verified

Nitrogen will behave most like an ideal gas

Correct Answer
verified

At what temperature in kelvin is the root mean square speed of helium atoms (atomic weight = 4.00) equal to that of oxygen molecules (molecular weight = 32.00) at 300. K?

Correct Answer
verified

Freon-12, CF₂Cl₂, which has been widely used in air conditioning systems, is considered a threat to the ozone layer in the stratosphere. Calculate the root-mean-square velocity of Freon-12 molecules in the lower stratosphere where the temperature is −65°C.

Correct Answer
verified

What is the density of carbon dioxide gas at −25.2°C and 98.0 kPa?

Correct Answer
verified

The pressure of sulfur dioxide in a container is 159 kPa. What is this pressure in atmospheres?

Correct Answer
verified

For an ideal gas, a plot of PV/nRT versus P gives a straight line with a positive slope.

Correct Answer
verified

Convert a gas pressure of 485 cmHg to atmospheres.

Correct Answer
verified

Use the van der Waals equation for real gases to calculate the pressure exerted by 1.00 mole of ammonia at 27°C in a 750-mL container. (a = 4.17 L²·atm/mol², b = 0.0371 L/mol)

Correct Answer
verified

What are the conditions of STP?

Correct Answer
verified

The ideal gas law tends to become inaccurate when

Correct Answer
verified

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li₂O(aq) + CO₂(g) → Li₂CO₃(s)

Correct Answer
verified

If 0.750 L of argon at 1.50 atm and 177°C and 0.235 L of sulfur dioxide at 95.0 kPa and 63.0°C are added to a 1.00-L flask and the flask's temperature is adjusted to 25.0°C, what is the resulting pressure in the flask?

Correct Answer
verified

Correct Answer
verified

What is the pressure in a 7.50-L flask if 0.15 mol of carbon dioxide is added to 0.33 mol of oxygen? The temperature of the mixture is 48.0°C.

Correct Answer
verified

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its Celsius temperature, other factors remaining constant?

Correct Answer
verified

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25°C?

Correct Answer
verified

A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is −15.8°C and its pressure is 524 torr?

Correct Answer
verified

Exam 5: Gases and the Kinetic-Molecular Theory

Correct AnswerverifiedShow Answer

Nitrogen will behave most like an ideal gas

Correct AnswerverifiedShow Answer

At what temperature in kelvin is the root mean square speed of helium atoms (atomic weight = 4.00) equal to that of oxygen molecules (molecular weight = 32.00) at 300. K?

Correct AnswerverifiedShow Answer

Freon-12, CF2Cl2, which has been widely used in air conditioning systems, is considered a threat to the ozone layer in the stratosphere. Calculate the root-mean-square velocity of Freon-12 molecules in the lower stratosphere where the temperature is −65°C.

Correct AnswerverifiedShow Answer

What is the density of carbon dioxide gas at −25.2°C and 98.0 kPa?

Correct AnswerverifiedShow Answer

The pressure of sulfur dioxide in a container is 159 kPa. What is this pressure in atmospheres?

Correct AnswerverifiedShow Answer

For an ideal gas, a plot of PV/nRT versus P gives a straight line with a positive slope.

Correct AnswerverifiedShow Answer

Convert a gas pressure of 485 cmHg to atmospheres.

Correct AnswerverifiedShow Answer

Use the van der Waals equation for real gases to calculate the pressure exerted by 1.00 mole of ammonia at 27°C in a 750-mL container. (a = 4.17 L2·atm/mol2, b = 0.0371 L/mol)

Correct AnswerverifiedShow Answer

What are the conditions of STP?

Correct AnswerverifiedShow Answer

The ideal gas law tends to become inaccurate when

Correct AnswerverifiedShow Answer

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li2O(aq) + CO2(g) → Li2CO3(s)

Correct AnswerverifiedShow Answer

If 0.750 L of argon at 1.50 atm and 177°C and 0.235 L of sulfur dioxide at 95.0 kPa and 63.0°C are added to a 1.00-L flask and the flask's temperature is adjusted to 25.0°C, what is the resulting pressure in the flask?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the pressure in a 7.50-L flask if 0.15 mol of carbon dioxide is added to 0.33 mol of oxygen? The temperature of the mixture is 48.0°C.

Correct AnswerverifiedShow Answer

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its Celsius temperature, other factors remaining constant?

Correct AnswerverifiedShow Answer

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25°C?

Correct AnswerverifiedShow Answer

A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is −15.8°C and its pressure is 524 torr?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Freon-12, CF₂Cl₂, which has been widely used in air conditioning systems, is considered a threat to the ozone layer in the stratosphere. Calculate the root-mean-square velocity of Freon-12 molecules in the lower stratosphere where the temperature is −65°C.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Use the van der Waals equation for real gases to calculate the pressure exerted by 1.00 mole of ammonia at 27°C in a 750-mL container. (a = 4.17 L²·atm/mol², b = 0.0371 L/mol)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li₂O(aq) + CO₂(g) → Li₂CO₃(s)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified