Question 1

Which represents the largest pressure?

Accepted Answer

A) one atmosphere 
B) five pounds per square inch 
C) one millimeter of mercury 
D) five mm Hg 
E) one hundred pascals 
A) one atmosphere 
B) five pounds per square inch 
C) one millimeter of mercury 
D) five mm Hg 
E) one hundred pascals

Question 2

A mixture of the gases N2,O2,and He has a total pressure of 760 mm Hg.If the partial pressure of N2 is 90 mm Hg and of O2 is 270 mm Hg,what is the partial pressure of He?

Accepted Answer

A) 1120 mm Hg 
B) 760 mm Hg 
C) 400 mm Hg 
D) 360 mm Hg 
E) 120 mm Hg 
A) 1120 mm Hg 
B) 760 mm Hg 
C) 400 mm Hg 
D) 360 mm Hg 
E) 120 mm Hg

Question 3

The number of mm Hg in one atmosphere is

Accepted Answer

A) 14.7. 
B) 760. 
C) 1.00. 
D) 29.9. 
E) 101.325. 
A) 14.7. 
B) 760. 
C) 1.00. 
D) 29.9. 
E) 101.325.

Question 4

Which description best fits a gas?

Accepted Answer

A) definite shape and volume;strong intermolecular attractions 
B) definite volume;shape of container;moderate intermolecular attractions 
C) definite volume;shape of container;weak intermolecular attractions 
D) volume and shape of container;no intermolecular attractions 
E) volume and shape of container;strong intermolecular attractions 
A) definite shape and volume;strong intermolecular attractions 
B) definite volume;shape of container;moderate intermolecular attractions 
C) definite volume;shape of container;weak intermolecular attractions 
D) volume and shape of container;no intermolecular attractions 
E) volume and shape of container;strong intermolecular attractions

Question 5

Which is a correct statement of Gay-Lussac's Law describing the behavior of a fixed amount of gas?

Accepted Answer

A) As pressure increases,volume increases at constant temperature. 
B) As pressure increases,volume decreases at constant temperature. 
C) As temperature increases,pressure decreases at constant volume. 
D) As temperature increases,pressure increases at constant volume. 
E) As temperature increases,volume increases at constant pressure. 
A) As pressure increases,volume increases at constant temperature. 
B) As pressure increases,volume decreases at constant temperature. 
C) As temperature increases,pressure decreases at constant volume. 
D) As temperature increases,pressure increases at constant volume. 
E) As temperature increases,volume increases at constant pressure.

Question 6

Arrange the following in order of increasing intermolecular forces:
N2 CH3CH2OH CO2 HCl

Accepted Answer

A) N2 2 3CH2OH 
B) CH3CH2OH 2 2 
C) CH3CH2OH 2 2 
D) HCl 3CH2OH 2 2 
E) N2 2 3CH2OH < HCl 
A) N2 2 3CH2OH 
B) CH3CH2OH 2 2 
C) CH3CH2OH 2 2 
D) HCl 3CH2OH 2 2 
E) N2 2 3CH2OH < HCl

Question 7

In comparing gases with liquids,gases have ________ compressibility and ________ density.

Accepted Answer

A) greater;smaller 
B) greater;greater 
C) smaller;smaller 
D) smaller;greater 
E) none of the above 
A) greater;smaller 
B) greater;greater 
C) smaller;smaller 
D) smaller;greater 
E) none of the above

Question 8

Which of the assumptions of the kinetic-molecular theory best explains Dalton's law of partial pressures?

Accepted Answer

A) Gas molecules move at random with no attractive forces between them. 
B) The velocity of gas molecules is proportional to their Kelvin temperature. 
C) The amount of space occupied by a gas is much greater than the space occupied by the actual gas molecules. 
D) In collisions with the walls of the container or with other molecules,energy is conserved. 
E) Collisions with the walls of the container or with other molecules are elastic. 
A) Gas molecules move at random with no attractive forces between them. 
B) The velocity of gas molecules is proportional to their Kelvin temperature. 
C) The amount of space occupied by a gas is much greater than the space occupied by the actual gas molecules. 
D) In collisions with the walls of the container or with other molecules,energy is conserved. 
E) Collisions with the walls of the container or with other molecules are elastic.

Question 9

List and describe two unique properties of water.Discuss the intermolecular force that causes these unusual properties.

Accepted Answer

Three properties that are acceptable are

Question 10

A 65 mL sample of argon gas has a temperature of 325°C.What will the temperature be in °C when the volume of the gas is decreased to 25 mL at constant pressure?

Accepted Answer

A) 65°C 
B) 125°C 
C) -43°C 
D) 1280°C 
E) 641°C 
A) 65°C 
B) 125°C 
C) -43°C 
D) 1280°C 
E) 641°C

Question 11

As the temperature of a liquid is lowered,what happens to its vapor pressure?

Accepted Answer

A) Its vapor pressure drops. 
B) Its vapor pressure rises. 
C) The vapor pressure may rise or drop depending on the liquid. 
D) Its vapor pressure is independent of temperature. 
E) Its vapor pressure first rises then falls. 
A) Its vapor pressure drops. 
B) Its vapor pressure rises. 
C) The vapor pressure may rise or drop depending on the liquid. 
D) Its vapor pressure is independent of temperature. 
E) Its vapor pressure first rises then falls.

Question 12

Which transformation is freezing?

Accepted Answer

A) liquid → solid 
B) liquid → gas 
C) solid → liquid 
D) solid → gas 
E) gas → liquid 
A) liquid → solid 
B) liquid → gas 
C) solid → liquid 
D) solid → gas 
E) gas → liquid

Question 13

Match the following.
-crystalline

Accepted Answer

A) having a definite orderly arrangement of particles 
B) the measure of a liquid's resistance to spreading out. 
C) the amount of space occupied by a gas 
D) the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure 
E) the amount of energy required to convert a liquid into a gas at its boiling point
F)the temperature at which the solid and liquid phase are at equilibrium
G)having no well-ordered shape or form
H)the number and force of collisions between molecules and the walls of the container
I)having atoms covalently bonded together in a large 3-dimensional array
J)the measure of a liquid's resistance to flow. 
A) having a definite orderly arrangement of particles 
B) the measure of a liquid's resistance to spreading out. 
C) the amount of space occupied by a gas 
D) the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure 
E) the amount of energy required to convert a liquid into a gas at its boiling point
F)the temperature at which the solid and liquid phase are at equilibrium
G)having no well-ordered shape or form
H)the number and force of collisions between molecules and the walls of the container
I)having atoms covalently bonded together in a large 3-dimensional array
J)the measure of a liquid's resistance to flow.

Question 14

Which of the assumptions of the kinetic-molecular theory best explains the observation that a balloon collapses when exposed to liquid nitrogen (which is much colder than a cold winter day!!)?

Accepted Answer

A) Gas molecules move at random with no attractive forces between them. 
B) The velocity of gas molecules is proportional to their Kelvin temperature. 
C) The amount of space occupied by a gas is much greater than the space occupied by the actual gas molecules. 
D) In collisions with the walls of the container or with other molecules,energy is conserved. 
E) Collisions with the walls of the container or with other molecules are elastic. 
A) Gas molecules move at random with no attractive forces between them. 
B) The velocity of gas molecules is proportional to their Kelvin temperature. 
C) The amount of space occupied by a gas is much greater than the space occupied by the actual gas molecules. 
D) In collisions with the walls of the container or with other molecules,energy is conserved. 
E) Collisions with the walls of the container or with other molecules are elastic.

Question 15

Sketch a graph illustrating Boyle's Law.Use a gas sample with a volume of 2.0 L at 0.75 atm and 25°C,and show at least two other points.

Accepted Answer

The graph should be a straight

Question 16

In a gas mixture of 35% He and 65% O2 the total pressure is 800 mm Hg.What is the partial pressure of O2?

Accepted Answer

A) 35 mm Hg 
B) 65 mm Hg 
C) 100 mm Hg 
D) 280 mm Hg 
E) 520 mm Hg 
A) 35 mm Hg 
B) 65 mm Hg 
C) 100 mm Hg 
D) 280 mm Hg 
E) 520 mm Hg

Question 17

When a liquid sample is taken from sea level to a higher elevation,what happens to the external (atmospheric)pressure on the liquid and the boiling point of the liquid?

Accepted Answer

A) Both decrease. 
B) Both increase. 
C) Pressure goes down but boiling point goes up. 
D) Pressure goes up but boiling point goes down. 
A) Both decrease. 
B) Both increase. 
C) Pressure goes down but boiling point goes up. 
D) Pressure goes up but boiling point goes down.

Question 18

Which intermolecular force is characteristic of compounds with low molar mass,which are liquids at room temperature and have relatively high boiling points?

Accepted Answer

A) dipole-dipole forces 
B) London forces 
C) hydrogen bonds 
D) ionic bonds 
E) covalent bonds 
A) dipole-dipole forces 
B) London forces 
C) hydrogen bonds 
D) ionic bonds 
E) covalent bonds

Question 19

Match the following.
-pressure

Accepted Answer

A) having a definite orderly arrangement of particles 
B) the measure of a liquid's resistance to spreading out. 
C) the amount of space occupied by a gas 
D) the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure 
E) the amount of energy required to convert a liquid into a gas at its boiling point
F)the temperature at which the solid and liquid phase are at equilibrium
G)having no well-ordered shape or form
H)the number and force of collisions between molecules and the walls of the container
I)having atoms covalently bonded together in a large 3-dimensional array
J)the measure of a liquid's resistance to flow. 
A) having a definite orderly arrangement of particles 
B) the measure of a liquid's resistance to spreading out. 
C) the amount of space occupied by a gas 
D) the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure 
E) the amount of energy required to convert a liquid into a gas at its boiling point
F)the temperature at which the solid and liquid phase are at equilibrium
G)having no well-ordered shape or form
H)the number and force of collisions between molecules and the walls of the container
I)having atoms covalently bonded together in a large 3-dimensional array
J)the measure of a liquid's resistance to flow.

Question 20

Which of the assumptions of the kinetic-molecular theory best explains the observation that a gas can be compressed?

Accepted Answer

A) Gas molecules move at random with no attractive forces between them. 
B) The velocity of gas molecules is proportional to their Kelvin temperature. 
C) The amount of space occupied by a gas is much greater than the space occupied by the actual gas molecules. 
D) In collisions with the walls of the container or with other molecules,energy is conserved. 
E) Collisions with the walls of the container or with other molecules are elastic. 
A) Gas molecules move at random with no attractive forces between them. 
B) The velocity of gas molecules is proportional to their Kelvin temperature. 
C) The amount of space occupied by a gas is much greater than the space occupied by the actual gas molecules. 
D) In collisions with the walls of the container or with other molecules,energy is conserved. 
E) Collisions with the walls of the container or with other molecules are elastic.

Exam 8: Gases, liquids, and Solids

Which represents the largest pressure?

A mixture of the gases N2,O2,and He has a total pressure of 760 mm Hg.If the partial pressure of N2 is 90 mm Hg and of O2 is 270 mm Hg,what is the partial pressure of He?

The number of mm Hg in one atmosphere is

Which description best fits a gas?

Which is a correct statement of Gay-Lussac's Law describing the behavior of a fixed amount of gas?

Arrange the following in order of increasing intermolecular forces: N2 CH3CH2OH CO2 HCl

In comparing gases with liquids,gases have ________ compressibility and ________ density.

Which of the assumptions of the kinetic-molecular theory best explains Dalton's law of partial pressures?

List and describe two unique properties of water.Discuss the intermolecular force that causes these unusual properties.

A 65 mL sample of argon gas has a temperature of 325°C.What will the temperature be in °C when the volume of the gas is decreased to 25 mL at constant pressure?

As the temperature of a liquid is lowered,what happens to its vapor pressure?

Which transformation is freezing?

Match the following. -crystalline

Which of the assumptions of the kinetic-molecular theory best explains the observation that a balloon collapses when exposed to liquid nitrogen (which is much colder than a cold winter day!!)?

Sketch a graph illustrating Boyle's Law.Use a gas sample with a volume of 2.0 L at 0.75 atm and 25°C,and show at least two other points.

In a gas mixture of 35% He and 65% O2 the total pressure is 800 mm Hg.What is the partial pressure of O2?

When a liquid sample is taken from sea level to a higher elevation,what happens to the external (atmospheric)pressure on the liquid and the boiling point of the liquid?

Which intermolecular force is characteristic of compounds with low molar mass,which are liquids at room temperature and have relatively high boiling points?

Match the following. -pressure

Which of the assumptions of the kinetic-molecular theory best explains the observation that a gas can be compressed?

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

A mixture of the gases N₂,O₂,and He has a total pressure of 760 mm Hg.If the partial pressure of N₂ is 90 mm Hg and of O₂ is 270 mm Hg,what is the partial pressure of He?

Arrange the following in order of increasing intermolecular forces: N₂ CH₃CH₂OH CO₂ HCl

In comparing gases with liquids,gases have compressibility and density.

In a gas mixture of 35% He and 65% O₂ the total pressure is 800 mm Hg.What is the partial pressure of O₂?