Question 1

The rate of diffusion of a gas is inversely proportional to its molar mass.

Accepted Answer

A) True 
 B)False

Question 2

The air pressure in a volleyball is 75 psi. What is this pressure in torr?

Accepted Answer

A)   520 torr
B)   562 torr
C)   3900 torr
D)   7600 torr
E)   75000 torr

Question 3

The ozone layer is important because

Accepted Answer

A)   ozone absorbs low energy radiation which warms the troposphere.
B)   ozone purifies the atmosphere by reacting with excess fluorocarbons.
C)   ozone absorbs ultraviolet radiation.
D)   ozone reflects high energy radiation such as X-rays and gamma rays.
E)   humans need to breathe air containing some ozone.

Question 4

At moderate pressures (~ 200 atm) , the measured pressure exerted by CO2 gas is less than that predicted by the ideal gas equation. This is mainly because

Accepted Answer

A)   such high pressures cannot be accurately measured.
B)   CO2 will condense to a liquid at 200 atm pressure.
C)   gas phase collisions prevent CO2 molecules from colliding with the walls of the container.
D)   of attractive intermolecular forces between CO2 molecules.
E)   the volume occupied by the CO2 molecules themselves becomes significant.

Question 5

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g)  at 37°C and 89.6 kPa in 5.25 L of water?

Accepted Answer

A)   1.49 M
B)   1.66 M
C)   7.82 M
D)   12.5 M
E)   16.6 M

Question 6

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 the above

Question 7

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. What pressure is she exerting on the floor?

Accepted Answer

A)   4.59 × 105 Pa
B)   4.59 × 103 Pa
C)   4.59 × 101 Pa
D)   4.59 × 10-1 Pa
E)   4.59 × 10-3 Pa

Question 8

Linolenic acid (C18H30O2)  can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C18H30O2 + 3H2  C18H36O2
What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

Accepted Answer

A)   2.53 L
B)   1.69 L
C)   1.27 L
D)   845 mL
E)   422 mL

Question 9

For real gases, PV > nRT, always.

Accepted Answer

A) True 
 B)False

Question 10

A carbon dioxide sample weighing 44.0 g occupies 32.68 L at 65°C and 645 torr. What is its volume at STP?

Accepted Answer

A)   22.4 L
B)   31.1 L
C)   34.3 L
D)   35.2 L
E)   47.7 L

Question 11

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

The answer of Which of the lines on the figure...

Question 12

State Charles's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

Accepted Answer

At constant pressure, the volume of a fi...

Question 13

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.5 g/mL)

Accepted Answer

A)   1.9 mm mineral oil
B)   15 mm mineral oil
C)   32 mm mineral oil
D)   380 mm mineral oil
E)   440 mm mineral oil

Question 14

Helium gas is being pumped into a rigid container at a constant temperature. As a result, the pressure of helium in the container is increasing. Select the one correct statement below.

Accepted Answer

A)   As the pressure increases, helium atoms move faster, on average.
B)   As the pressure increases, helium atoms move more slowly, on average.
C)   As the pressure increases, the volume of the container must decrease.
D)   As the pressure increases, helium atoms stay closer to the wall of the container, on average.
E)   As the pressure increases, there are more collisions of helium atoms with the container wall.

Question 15

"The pressure of an ideal gas is directly proportional to its absolute temperature at constant volume and number of moles" is a statement of ________________ Law.

Accepted Answer

A)   Charles's
B)   Boyle's
C)   Amontons's
D)   Avogadro's
E)   Gay-Lussac's

Question 16

A 1.30-L sample of argon gas is at 1.02 atm and 21.5°C.
a. What mass of argon is in the container?
b. If the temperature is raised to 500.0°C while the volume remains constant, calculate the new pressure, in atmospheres.

Accepted Answer

a. 2.19 g
...

Question 17

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (Pwater = 24 torr at 25°C)

Accepted Answer

A)   0.00291 g
B)   0.0931 g
C)   0.0962 g
D)   0.0993 g
E)   0.962 g

Question 18

A flask with a volume of 3.16 L contains 9.33 grams of an unknown gas at 32.0°C and 1.00 atm. What is the molar mass of the gas?

Accepted Answer

A)   7.76 g/mol
B)   66.1 g/mol
C)   74.0 g/mol
D)   81.4 g/mol
E)   144 g/mol

Question 19

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 10.0 g of glucose?
C6H12O6(aq) F1F1F1S1F1F1F10 2C2H5OH(aq) + 2CO2(g)

Accepted Answer

Question 20

A sample of methane gas, CH4(g) , occupies a volume of 60.3 L at a pressure of 469 torr and a temperature of 29.3°C. What would be its temperature at a pressure of 243 torr and volume of 60.3 L?

Accepted Answer

A)   -116.5°C
B)   15.2°C
C)   15.5°C
D)   57.7°C
E)   310.6°C

Exam 5: Gases and the Kinetic-Molecular Theory

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 10.0 g of glucose? C₆H₁₂O₆(aq)  2C₂H₅OH(aq) + 2CO₂(g)

Correct Answer
verified

The ozone layer is important because

Correct Answer
verified

A sample of methane gas, CH₄(g) , occupies a volume of 60.3 L at a pressure of 469 torr and a temperature of 29.3°C. What would be its temperature at a pressure of 243 torr and volume of 60.3 L?

Correct Answer
verified

A flask with a volume of 3.16 L contains 9.33 grams of an unknown gas at 32.0°C and 1.00 atm. What is the molar mass of the gas?

Correct Answer
verified

"The pressure of an ideal gas is directly proportional to its absolute temperature at constant volume and number of moles" is a statement of ________________ Law.

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

Linolenic acid (C₁₈H₃₀O₂) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C₁₈H₃₀O₂ + 3H₂  C₁₈H₃₆O₂ What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

Correct Answer
verified

A 1.30-L sample of argon gas is at 1.02 atm and 21.5°C. a. What mass of argon is in the container? b. If the temperature is raised to 500.0°C while the volume remains constant, calculate the new pressure, in atmospheres.

Correct Answer
verified
a. 2.19 g
...
View Answer

The rate of diffusion of a gas is inversely proportional to its molar mass.

Correct Answer
verified

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm² of her slippers in contact with the floor. What pressure is she exerting on the floor?

Correct Answer
verified

State Charles's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

Correct Answer
verified
At constant pressure, the volume of a fi...
View Answer

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37°C and 89.6 kPa in 5.25 L of water?

Correct Answer
verified

Helium gas is being pumped into a rigid container at a constant temperature. As a result, the pressure of helium in the container is increasing. Select the one correct statement below.

Correct Answer
verified

The air pressure in a volleyball is 75 psi. What is this pressure in torr?

Correct Answer
verified

For real gases, PV > nRT, always.

Correct Answer
verified

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.5 g/mL)

Correct Answer
verified

A carbon dioxide sample weighing 44.0 g occupies 32.68 L at 65°C and 645 torr. What is its volume at STP?

Correct Answer
verified

At moderate pressures (~ 200 atm) , the measured pressure exerted by CO₂ gas is less than that predicted by the ideal gas equation. This is mainly because

Correct Answer
verified

Correct Answer
verified

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (P_water = 24 torr at 25°C)

Correct Answer
verified

Exam 5: Gases and the Kinetic-Molecular Theory

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 10.0 g of glucose? C6H12O6(aq)  2C2H5OH(aq) + 2CO2(g)

Correct AnswerverifiedShow Answer

The ozone layer is important because

Correct AnswerverifiedShow Answer

A sample of methane gas, CH4(g) , occupies a volume of 60.3 L at a pressure of 469 torr and a temperature of 29.3°C. What would be its temperature at a pressure of 243 torr and volume of 60.3 L?

Correct AnswerverifiedShow Answer

A flask with a volume of 3.16 L contains 9.33 grams of an unknown gas at 32.0°C and 1.00 atm. What is the molar mass of the gas?

Correct AnswerverifiedShow Answer

"The pressure of an ideal gas is directly proportional to its absolute temperature at constant volume and number of moles" is a statement of ________________ Law.

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

Linolenic acid (C18H30O2) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C18H30O2 + 3H2  C18H36O2 What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

Correct AnswerverifiedShow Answer

A 1.30-L sample of argon gas is at 1.02 atm and 21.5°C. a. What mass of argon is in the container? b. If the temperature is raised to 500.0°C while the volume remains constant, calculate the new pressure, in atmospheres.

Correct Answerverifieda. 2.19 g...View AnswerShow Answer

The rate of diffusion of a gas is inversely proportional to its molar mass.

Correct AnswerverifiedShow Answer

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. What pressure is she exerting on the floor?

Correct AnswerverifiedShow Answer

State Charles's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

Correct AnswerverifiedAt constant pressure, the volume of a fi...View AnswerShow Answer

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37°C and 89.6 kPa in 5.25 L of water?

Correct AnswerverifiedShow Answer

Helium gas is being pumped into a rigid container at a constant temperature. As a result, the pressure of helium in the container is increasing. Select the one correct statement below.

Correct AnswerverifiedShow Answer

The air pressure in a volleyball is 75 psi. What is this pressure in torr?

Correct AnswerverifiedShow Answer

For real gases, PV > nRT, always.

Correct AnswerverifiedShow Answer

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.5 g/mL)

Correct AnswerverifiedShow Answer

A carbon dioxide sample weighing 44.0 g occupies 32.68 L at 65°C and 645 torr. What is its volume at STP?

Correct AnswerverifiedShow Answer

At moderate pressures (~ 200 atm) , the measured pressure exerted by CO2 gas is less than that predicted by the ideal gas equation. This is mainly because

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (Pwater = 24 torr at 25°C)

Correct AnswerverifiedShow Answer

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 10.0 g of glucose? C₆H₁₂O₆(aq)  2C₂H₅OH(aq) + 2CO₂(g)

Correct Answer
verified

Correct Answer
verified

A sample of methane gas, CH₄(g) , occupies a volume of 60.3 L at a pressure of 469 torr and a temperature of 29.3°C. What would be its temperature at a pressure of 243 torr and volume of 60.3 L?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Linolenic acid (C₁₈H₃₀O₂) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C₁₈H₃₀O₂ + 3H₂  C₁₈H₃₆O₂ What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

Correct Answer
verified

Correct Answer
verified
a. 2.19 g
...
View Answer

Correct Answer
verified

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm² of her slippers in contact with the floor. What pressure is she exerting on the floor?

Correct Answer
verified

Correct Answer
verified
At constant pressure, the volume of a fi...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

At moderate pressures (~ 200 atm) , the measured pressure exerted by CO₂ gas is less than that predicted by the ideal gas equation. This is mainly because

Correct Answer
verified

Correct Answer
verified

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (P_water = 24 torr at 25°C)

Correct Answer
verified