Question 1

A balloon that contains 0.500 L of helium at 25 °C is cooled to 11 °C, at a constant pressure. What volume does the balloon now occupy?

Accepted Answer

A) 0.22 L 
B) 1.1 L 
C) 0.477 L 
D) 0.525 L 
E) 0.500 L 
A) 0.22 L 
B) 1.1 L 
C) 0.477 L 
D) 0.525 L 
E) 0.500 L C

Question 2

The size of gas particles is large compared to the space between the particles.

Accepted Answer

A) True 
 B)False  False

Question 3

It requires less heat to melt a 10-g sample of water than to vaporize a 10-g sample of water.

Accepted Answer

A) True 
 B)False  True

Question 4

Which molecule(s)exhibit London dispersion forces?

Accepted Answer

A) CH4 
B) CHCl3 
C) NF3 
D) HF 
E) All of the molecules above exhibit London dispersion forces. 
A) CH4 
B) CHCl3 
C) NF3 
D) HF 
E) All of the molecules above exhibit London dispersion forces.

Question 5

Polypropylene, a typical plastic, is an example of an amorphous solid.

Accepted Answer

A) True 
 B)False

Question 6

Which assumption is not part of the kinetic-molecular theory of gases?

Accepted Answer

A) A gas consists of particles that move randomly and rapidly. 
B) The size of gas particles is small compared to the space between the particles. 
C) Because the space between gas particles is large, gas particles exert no attractive forces on each other. 
D) The kinetic energy of gas particles does not change with increasing temperature. 
E) When gas particles collide with each other, they rebound and travel in new directions. 
A) A gas consists of particles that move randomly and rapidly. 
B) The size of gas particles is small compared to the space between the particles. 
C) Because the space between gas particles is large, gas particles exert no attractive forces on each other. 
D) The kinetic energy of gas particles does not change with increasing temperature. 
E) When gas particles collide with each other, they rebound and travel in new directions.

Question 7

The value of the universal gas constant, R, changes as a function of temperature.

Accepted Answer

A) True 
 B)False

Question 8

The type(s)of intermolecular forces exhibited by hydrogen bromide molecules, HBr, is/are _____.

Accepted Answer

London dispersion forces or Lo

Question 9

If the lungs of a child hold 0.11 mol of air in a volume of 2.8 L, then the lungs of an average female adult, with a volume is 4.6 L, can be expected to hold 0.18 mol of air.

Accepted Answer

A) True 
 B)False

Question 10

Which gas sample contains the largest number of moles?

Accepted Answer

A) 4.0 L of O2 at 273 K and 530 mm Hg 
B) 4.5 L of N2 at 298 K and 610 mm Hg 
C) 3.8 L of He at 250 K and 880 mm Hg 
D) 5.0 L Ar at 300 K and 710 mm Hg 
A) 4.0 L of O2 at 273 K and 530 mm Hg 
B) 4.5 L of N2 at 298 K and 610 mm Hg 
C) 3.8 L of He at 250 K and 880 mm Hg 
D) 5.0 L Ar at 300 K and 710 mm Hg

Question 11

Surface tension measures which of the following?

Accepted Answer

A) a liquid's resistance to flow 
B) a liquid's resistance to spreading out 
C) a liquid's ability to boil at low temperatures 
D) the molecular weight of a compound 
A) a liquid's resistance to flow 
B) a liquid's resistance to spreading out 
C) a liquid's ability to boil at low temperatures 
D) the molecular weight of a compound

Question 12

Given these vapor pressures at 20 °C: butane, 1, 650 mm Hg; acetaldehyde, 740 mm Hg, Freon-113, 284 mm Hg, the compound with the lowest boiling point is _____.

Accepted Answer

The answer of Given these vapor pressures at 20 °C:...

Question 13

If two compounds have the same molecular formula they will have the same boiling point.

Accepted Answer

A) True 
 B)False

Question 14

An aerosol can has a pressure of 1.86 atm. What is this pressure expressed in units of mm Hg?

Accepted Answer

A) 1.86 mm Hg 
B) 1410 mm Hg 
C) 1860 mm Hg 
D) 0.00245 mm Hg 
A) 1.86 mm Hg 
B) 1410 mm Hg 
C) 1860 mm Hg 
D) 0.00245 mm Hg

Question 15

How many moles are contained in 5.33 L of O2 at standard temperature and pressure?

Accepted Answer

A) 5.33 mol of O2 
B) 1.00 mol of O2 
C) 0.238 mol of O2 
D) 22.4 mol of O2 
E) 4.20 mol of O2 
A) 5.33 mol of O2 
B) 1.00 mol of O2 
C) 0.238 mol of O2 
D) 22.4 mol of O2 
E) 4.20 mol of O2

Question 16

Evaporation is an endothermic process.

Accepted Answer

A) True 
 B)False

Question 17

When a sample of gas is compressed from 6.0 L to 2.0 L at a constant temperature, the pressure of the gas triples.

Accepted Answer

A) True 
 B)False

Question 18

A sample of gas contains four gases with the following partial pressures: He (113 mm Hg), Ne (184 mm Hg), Ar (35 mm Hg), and Xe (445 mm Hg). What is the total pressure of the sample?

Accepted Answer

A) 777 mm Hg 
B) 760. mm Hg 
C) 445 mm Hg 
D) 332 mm Hg 
A) 777 mm Hg 
B) 760. mm Hg 
C) 445 mm Hg 
D) 332 mm Hg

Question 19

The numerical value of the universal gas constant, R, depends on its units.

Accepted Answer

A) True 
 B)False

Question 20

A gas cylinder containing 6.38 mol of neon has a pressure of 491 mm Hg at 295 K. If 3.22 mol of helium is added to this cylinder, at constant temperature and volume, what will be the pressure in the cylinder?

Accepted Answer

A) 9.73 mm Hg 
B) 739 mm Hg 
C) 1460 mm Hg 
D) 248 mm Hg 
A) 9.73 mm Hg 
B) 739 mm Hg 
C) 1460 mm Hg 
D) 248 mm Hg

Exam 7: Gases, Liquids, and Solids

A balloon that contains 0.500 L of helium at 25 °C is cooled to 11 °C, at a constant pressure. What volume does the balloon now occupy?

The size of gas particles is large compared to the space between the particles.

It requires less heat to melt a 10-g sample of water than to vaporize a 10-g sample of water.

Which molecule(s)exhibit London dispersion forces?

Polypropylene, a typical plastic, is an example of an amorphous solid.

Which assumption is not part of the kinetic-molecular theory of gases?

The value of the universal gas constant, R, changes as a function of temperature.

The type(s)of intermolecular forces exhibited by hydrogen bromide molecules, HBr, is/are _____.

If the lungs of a child hold 0.11 mol of air in a volume of 2.8 L, then the lungs of an average female adult, with a volume is 4.6 L, can be expected to hold 0.18 mol of air.

Which gas sample contains the largest number of moles?

Surface tension measures which of the following?

Given these vapor pressures at 20 °C: butane, 1, 650 mm Hg; acetaldehyde, 740 mm Hg, Freon-113, 284 mm Hg, the compound with the lowest boiling point is _____.

If two compounds have the same molecular formula they will have the same boiling point.

An aerosol can has a pressure of 1.86 atm. What is this pressure expressed in units of mm Hg?

How many moles are contained in 5.33 L of O2 at standard temperature and pressure?

Evaporation is an endothermic process.

When a sample of gas is compressed from 6.0 L to 2.0 L at a constant temperature, the pressure of the gas triples.

A sample of gas contains four gases with the following partial pressures: He (113 mm Hg), Ne (184 mm Hg), Ar (35 mm Hg), and Xe (445 mm Hg). What is the total pressure of the sample?

The numerical value of the universal gas constant, R, depends on its units.

A gas cylinder containing 6.38 mol of neon has a pressure of 491 mm Hg at 295 K. If 3.22 mol of helium is added to this cylinder, at constant temperature and volume, what will be the pressure in the cylinder?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes, Reaction Rates, and Equilibrium

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen, Halogen, or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids, Esters, and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids, Proteins, and Enzymes

Nucleic Acids and Protein Synthesis

Digestion and the Conversion of Food Into Energy

Carbohydrate, Lipid, and Protein Metabolism

Filters

How many moles are contained in 5.33 L of O₂at standard temperature and pressure?