Question 1

Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pressure, 760. mmHg?

Accepted Answer

A)  1.03 × 103 torr 
B)  1.03 × 103 Pa 
C)  1.03 × 103 mm height of water column 
D)  1.03 × 103 cm height of water column 
E)  13.6 atm 
A)  1.03 × 103 torr 
B)  1.03 × 103 Pa 
C)  1.03 × 103 mm height of water column 
D)  1.03 × 103 cm height of water column 
E)  13.6 atm

Question 2

"The total pressure in a mixture of unreacting gases is equal to the sum of the partial pressures of the individual gases" is a statement of __________________ Law.

Accepted Answer

A)  Charles's 
B)  Graham's 
C)  Boyle's 
D)  Avogadro's 
E)  Dalton's 
A)  Charles's 
B)  Graham's 
C)  Boyle's 
D)  Avogadro's 
E)  Dalton's

Question 3

If the molecular mass of a gas increases by a factor of 4 at constant temperature, its rms speed will

Accepted Answer

A)  decrease by a factor of 4. 
B)  increase by a factor of 4. 
C)  decrease by a factor of 16. 
D)  increase by a factor of 16. 
E)  decrease by a factor of 2. 
A)  decrease by a factor of 4. 
B)  increase by a factor of 4. 
C)  decrease by a factor of 16. 
D)  increase by a factor of 16. 
E)  decrease by a factor of 2.

Question 4

According to the postulates of kinetic-molecular theory, the molecules of all gases at a given temperature have the same average kinetic energy.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following gases will be the slowest to diffuse through a room?

Accepted Answer

A)  methane, CH4 
B)  hydrogen sulfide, H2S 
C)  carbon dioxide, CO2 
D)  water, H2O 
E)  neon, Ne 
A)  methane, CH4 
B)  hydrogen sulfide, H2S 
C)  carbon dioxide, CO2 
D)  water, H2O 
E)  neon, Ne

Question 6

Which of the following gases effuses most rapidly?

Accepted Answer

A)  nitrogen 
B)  oxygen 
C)  hydrogen chloride 
D)  ammonia 
E)  carbon monoxide 
A)  nitrogen 
B)  oxygen 
C)  hydrogen chloride 
D)  ammonia 
E)  carbon monoxide

Question 7

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 atm 
A)  9.00 × 10-2 atm 
B)  0.933 atm 
C)  1.11 atm 
D)  1.70 atm 
E)  11.1 atm

Question 8

When a closed-ended manometer is used for pressure measurements, and the closed end is under vacuum, the level of manometer liquid in the closed arm can never be lower than that in the other arm.

Accepted Answer

A) True 
 B)False

Question 9

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

Question 10

For a gas obeying Charles's Law, a plot of V versus 1/T will give a straight line passing through the origin.

Accepted Answer

A) True 
 B)False

Question 11

According to the postulates of kinetic-molecular theory, the average kinetic energy of gas molecules is proportional to the absolute temperature.

Accepted Answer

A) True 
 B)False

Question 12

State Amontons'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 volume, the pressure of a fi

Question 13

For a gas obeying Boyle's Law, a plot of V versus 1/P will give a straight line passing through the origin.

Accepted Answer

A) True 
 B)False

Question 14

Ima Chemist found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Accepted Answer

A)  96.7 g/mol 
B)  108 g/mol 
C)  127 g/mol 
D)  165 g/mol 
E)  175 g/mol 
A)  96.7 g/mol 
B)  108 g/mol 
C)  127 g/mol 
D)  165 g/mol 
E)  175 g/mol

Question 15

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (Pwater = 24 torr at 25°C)

Accepted Answer

A)  0.00765 g 
B)  0.0154 g 
C)  0.0159 g 
D)  0.0164 g 
E)  0.159 g 
A)  0.00765 g 
B)  0.0154 g 
C)  0.0159 g 
D)  0.0164 g 
E)  0.159 g

Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pressure, 760. mmHg?

"The total pressure in a mixture of unreacting gases is equal to the sum of the partial pressures of the individual gases" is a statement of __________________ Law.

If the molecular mass of a gas increases by a factor of 4 at constant temperature, its rms speed will

According to the postulates of kinetic-molecular theory, the molecules of all gases at a given temperature have the same average kinetic energy.

Which of the following gases will be the slowest to diffuse through a room?

Which of the following gases effuses most rapidly?

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?

When a closed-ended manometer is used for pressure measurements, and the closed end is under vacuum, the level of manometer liquid in the closed arm can never be lower than that in the other arm.

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

For a gas obeying Charles's Law, a plot of V versus 1/T will give a straight line passing through the origin.

According to the postulates of kinetic-molecular theory, the average kinetic energy of gas molecules is proportional to the absolute temperature.

State Amontons'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.

For a gas obeying Boyle's Law, a plot of V versus 1/P will give a straight line passing through the origin.

Ima Chemist found the density of Freon-11 (CFCl₃) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (P_water = 24 torr at 25°C)

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Exam 5: Gases and the Kinetic-Molecular Theory

Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pressure, 760. mmHg?

"The total pressure in a mixture of unreacting gases is equal to the sum of the partial pressures of the individual gases" is a statement of __________________ Law.

If the molecular mass of a gas increases by a factor of 4 at constant temperature, its rms speed will

According to the postulates of kinetic-molecular theory, the molecules of all gases at a given temperature have the same average kinetic energy.

Which of the following gases will be the slowest to diffuse through a room?

Which of the following gases effuses most rapidly?

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?

When a closed-ended manometer is used for pressure measurements, and the closed end is under vacuum, the level of manometer liquid in the closed arm can never be lower than that in the other arm.

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

For a gas obeying Charles's Law, a plot of V versus 1/T will give a straight line passing through the origin.

According to the postulates of kinetic-molecular theory, the average kinetic energy of gas molecules is proportional to the absolute temperature.

State Amontons'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.

For a gas obeying Boyle's Law, a plot of V versus 1/P will give a straight line passing through the origin.

Ima Chemist found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (Pwater = 24 torr at 25°C)

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Ima Chemist found the density of Freon-11 (CFCl₃) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (P_water = 24 torr at 25°C)