Question 1

Air contains 78% N2, 21% O2, and 1% Ar, by volume. What is the density of air at 1,000. torr and -10°C?

Accepted Answer

A)  1.0 g/L
B)  6.1 g/L
C)  1.3 g/L
D)  1.8 g/L
E)  0.56 g/LF) B) and E)
G) B) and C)

Question 2

Calculate the molar mass of a gaseous substance if 0.125 g of the gas occupies 93.3 mL at STP.

Accepted Answer

The answer of Calculate the molar mass of a gaseous...

Question 3

The temperature of an ideal gas in a 5.00 L container originally at 1 atm pressure and 25°C is lowered to 220 K. Calculate the new pressure of the gas.

Accepted Answer

A)  1.0 atm
B)  1.35 atm
C)  8.8 atm
D)  0.738 atm
E)  0.114 atmF) B) and E)
G) C) and D)

Question 4

A gas-filled balloon with a volume of 12.5 L at 0.90 atm and 21°C is allowed to rise to the stratosphere where the temperature is -5°C and the pressure is 1.0 millibar. What is the final volume of the balloon? 1.000 atm = 1.013 bar.

Accepted Answer

1.0 * 10<s...

Question 5

The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa? (1 atm = 1.01325 * 105 Pa)

Accepted Answer

A)  87.2 kPa
B)  118 kPa
C)  6.63 * 104 kPa
D)  8.72 * 104 kPa
E)  8.72 * 107 kPaF) A) and E)
G) B) and E)

Question 6

Calculate the density of CO2(g) at 100°C and 10.0 atm pressure.

Accepted Answer

A)  1.44 g/L
B)  134 g/L
C)  44.0 g/L
D)  53.6 g/L
E)  14.4 g/LF) B) and D)
G) D) and E)

Question 7

What is the significance of the magnitude of the van der Waals "a" constant?

Accepted Answer

The magnitude of the van der W...

Question 8

At what temperature will a fixed amount of gas with a volume of 175 L at 15°C and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg?

Accepted Answer

A)  274°C
B)  214°C
C)  114°C
D)  1°C
E)  -59°CF) B) and E)
G) A) and D)

Question 9

A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height? The density of mercury is 13.6 g/cm3; the density of water is 1.00 g/cm3.

Accepted Answer

A)  1.00 * 102 ft
B)  18.8 mm
C)  33.8 ft
D)  76.0 cm
E)  348 cmF) A) and E)
G) B) and E)

Question 10

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100. cm3 at 95°C, and 1,000. mmHg.

Accepted Answer

A)  0.19 g/mol
B)  35.3 g/mol
C)  70.9 g/mol
D)  137 g/mol
E)  384 g/molF) B) and D)
G) D) and E)

Question 11

The molecules of different samples of an ideal gas have the same average kinetic energies, at the same

Accepted Answer

A)  pressure.
B)  temperature.
C)  volume.
D)  density.E) A) and B)
F) None of the above

Question 12

A method of removing CO2 from a spacecraft is to allow the CO2 to react with sodium hydroxide. (The products of the reaction are sodium carbonate and water.) What volume of carbon dioxide at 25°C and 749 mmHg can be removed per kilogram of sodium hydroxide that reacts?

Accepted Answer

A)  301 L
B)  284 L
C)  276 L
D)  310 L
E)  620 LF) A) and B)
G) B) and C)

Question 13

Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.

Accepted Answer

A)  0.263 g
B)  2.46 g
C)  3.80 g
D)  35.2 g
E)  206 gF) B) and C)
G) C) and E)

Question 14

How many grams of N2O, nitrous oxide, are contained in 500. mL of the gas at STP?

Accepted Answer

Question 15

Deviations from the ideal gas law are greater at

Accepted Answer

A)  low temperatures and low pressures.
B)  low temperatures and high pressures.
C)  high temperatures and high pressures.
D)  high temperatures and low pressures.E) B) and C)
F) A) and D)

Question 16

The gas pressure in an aerosol can is 1.8 atm at 25°C. If the gas is an ideal gas, what pressure would develop in the can if it were heated to 475°C?

Accepted Answer

A)  0.095 atm
B)  0.717 atm
C)  3.26 atm
D)  4.52 atm
E)  34.2 atmF) B) and E)
G) A) and B)

Question 17

A block of dry ice (solid CO2, density = 1.56 g/mL) of dimensions 25.0 cm * 25.0 cm * 25.0 cm is left to sublime (i.e. to pass from the solid phase to the gas phase) in a closed chamber of dimensions 4.00 m * 5.00 m * 3.00 m. The partial pressure of carbon dioxide in this chamber at 25°C will be

Accepted Answer

A)  171 mmHg.
B)  107 mmHg.
C)  0.225 mmHg.
D)  0.171 mmHg.
E)  14.4 mmHg.F) B) and C)
G) C) and D)

Question 18

What is the molar mass of Freon-11 gas if its density is 6.13 g/L at STP?

Accepted Answer

A)  0.274 g/mol
B)  3.64 g/mol
C)  78.2 g/mol
D)  137 g/mol
E)  365 g/molF) B) and E)
G) B) and C)

Question 19

Gasoline (which can be considered to be octane, C8H18)burns in oxygen to produce carbon dioxide and water. What volume of oxygen at STP is necessary to react with 1.0 gal of gasoline?
(The density of gasoline is 0.81 g/mL. 1 gal = 3.78 L)

Accepted Answer

Question 20

Calculate the volume occupied by 35.2 g of methane gas (CH4) at 25°C and 1.0 atm. R = 0.08206 L3atm/K3mol.

Accepted Answer

A)  0.0186 L
B)  4.5 L
C)  11.2 L
D)  49.2 L
E)  53.7 LF) A) and B)
G) None of the above

Exam 5: Gases

The temperature of an ideal gas in a 5.00 L container originally at 1 atm pressure and 25°C is lowered to 220 K. Calculate the new pressure of the gas.

Correct AnswerverifiedShow Answer

The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa? (1 atm = 1.01325 * 105 Pa)

Correct AnswerverifiedShow Answer

At what temperature will a fixed amount of gas with a volume of 175 L at 15°C and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg?

Correct AnswerverifiedShow Answer

Air contains 78% N2, 21% O2, and 1% Ar, by volume. What is the density of air at 1,000. torr and -10°C?

Correct AnswerverifiedShow Answer

Gasoline (which can be considered to be octane, C8H18)burns in oxygen to produce carbon dioxide and water. What volume of oxygen at STP is necessary to react with 1.0 gal of gasoline? (The density of gasoline is 0.81 g/mL. 1 gal = 3.78 L)

Correct AnswerverifiedShow Answer

Calculate the volume occupied by 35.2 g of methane gas (CH4) at 25°C and 1.0 atm. R = 0.08206 L3atm/K3mol.

Correct AnswerverifiedShow Answer

How many grams of N2O, nitrous oxide, are contained in 500. mL of the gas at STP?

Correct AnswerverifiedShow Answer

What is the significance of the magnitude of the van der Waals "a" constant?

Correct AnswerverifiedThe magnitude of the van der W...View AnswerShow Answer

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100. cm3 at 95°C, and 1,000. mmHg.

Correct AnswerverifiedShow Answer

A block of dry ice (solid CO2, density = 1.56 g/mL) of dimensions 25.0 cm * 25.0 cm * 25.0 cm is left to sublime (i.e. to pass from the solid phase to the gas phase) in a closed chamber of dimensions 4.00 m * 5.00 m * 3.00 m. The partial pressure of carbon dioxide in this chamber at 25°C will be

Correct AnswerverifiedShow Answer

A method of removing CO2 from a spacecraft is to allow the CO2 to react with sodium hydroxide. (The products of the reaction are sodium carbonate and water.) What volume of carbon dioxide at 25°C and 749 mmHg can be removed per kilogram of sodium hydroxide that reacts?

Correct AnswerverifiedShow Answer

Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.

Correct AnswerverifiedShow Answer

What is the molar mass of Freon-11 gas if its density is 6.13 g/L at STP?

Correct AnswerverifiedShow Answer

Calculate the density of CO2(g) at 100°C and 10.0 atm pressure.

Correct AnswerverifiedShow Answer

The molecules of different samples of an ideal gas have the same average kinetic energies, at the same

Correct AnswerverifiedShow Answer

The gas pressure in an aerosol can is 1.8 atm at 25°C. If the gas is an ideal gas, what pressure would develop in the can if it were heated to 475°C?

Correct AnswerverifiedShow Answer

A gas-filled balloon with a volume of 12.5 L at 0.90 atm and 21°C is allowed to rise to the stratosphere where the temperature is -5°C and the pressure is 1.0 millibar. What is the final volume of the balloon? 1.000 atm = 1.013 bar.

Correct Answerverified1.0 * 10View AnswerShow Answer

A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height? The density of mercury is 13.6 g/cm3; the density of water is 1.00 g/cm3.

Correct AnswerverifiedShow Answer

Calculate the molar mass of a gaseous substance if 0.125 g of the gas occupies 93.3 mL at STP.

Correct AnswerverifiedShow Answer

Deviations from the ideal gas law are greater at

Correct AnswerverifiedShow Answer

Correct Answer
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The pressure of a gas sample was measured to be 654 mmHg. What is the pressure in kPa? (1 atm = 1.01325 * 10⁵ Pa)

Correct Answer
verified

Correct Answer
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Air contains 78% N₂, 21% O₂, and 1% Ar, by volume. What is the density of air at 1,000. torr and -10°C?

Correct Answer
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Gasoline (which can be considered to be octane, C₈H₁₈)burns in oxygen to produce carbon dioxide and water. What volume of oxygen at STP is necessary to react with 1.0 gal of gasoline? (The density of gasoline is 0.81 g/mL. 1 gal = 3.78 L)

Correct Answer
verified

Calculate the volume occupied by 35.2 g of methane gas (CH₄) at 25°C and 1.0 atm. R = 0.08206 L3atm/K3mol.

Correct Answer
verified

How many grams of N₂O, nitrous oxide, are contained in 500. mL of the gas at STP?

Correct Answer
verified

Correct Answer
verified
The magnitude of the van der W...
View Answer

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100. cm³ at 95°C, and 1,000. mmHg.

Correct Answer
verified

A block of dry ice (solid CO₂, density = 1.56 g/mL) of dimensions 25.0 cm * 25.0 cm * 25.0 cm is left to sublime (i.e. to pass from the solid phase to the gas phase) in a closed chamber of dimensions 4.00 m * 5.00 m * 3.00 m. The partial pressure of carbon dioxide in this chamber at 25°C will be

Correct Answer
verified

A method of removing CO₂ from a spacecraft is to allow the CO₂ to react with sodium hydroxide. (The products of the reaction are sodium carbonate and water.) What volume of carbon dioxide at 25°C and 749 mmHg can be removed per kilogram of sodium hydroxide that reacts?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Calculate the density of CO₂(g) at 100°C and 10.0 atm pressure.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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1.0 * 10
View Answer

A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height? The density of mercury is 13.6 g/cm³; the density of water is 1.00 g/cm³.

Correct Answer
verified

Correct Answer
verified

Correct Answer
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