Question 1

Which pair of molecules has the strongest dipole-dipole interactions?

Accepted Answer

A) NH3 and CH4 
B) NH3 and NH3 
C) CH4 and CH4 
D) CO2 and CO2 
E) CO2 and CH4 
A) NH3 and CH4 
B) NH3 and NH3 
C) CH4 and CH4 
D) CO2 and CO2 
E) CO2 and CH4

Question 2

For the following reaction,if 11.2 L of nitrogen are reacted to form NH3 at STP,how many liters of hydrogen will be required to completely consume all of the nitrogen?
N2 + 3H2 → 2NH3

Accepted Answer

A) 16.8 L 
B) 11.2 L 
C) 7.4 L 
D) 33.6 L 
E) 6.1 L 
A) 16.8 L 
B) 11.2 L 
C) 7.4 L 
D) 33.6 L 
E) 6.1 L

Question 3

What will be the new volume when 128 mL of gas at 20.0°C is heated to 40.0°C while pressure remains unchanged?

Accepted Answer

A) 64.0 mL 
B) 120.mL 
C) 128 mL 
D) 137 mL 
E) 256 mL 
A) 64.0 mL 
B) 120.mL 
C) 128 mL 
D) 137 mL 
E) 256 mL

Question 4

If a 0.614 g sample of a gas maintains a pressure of 238 mm Hg when contained in a 1.0 L flask at 0.0°C,what is the gas's molecular weight?

Accepted Answer

A) 44 g/mol 
B) 120 g/mol 
C) 8.8 g/mol 
D) 22 g/mol 
E) 5 g/mol 
A) 44 g/mol 
B) 120 g/mol 
C) 8.8 g/mol 
D) 22 g/mol 
E) 5 g/mol

Question 5

Which transformation is melting?

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 6

Which is the best description of hydrogen bonding?

Accepted Answer

A) the unique chemical bonds between hydrogen and any other atom in the same molecule 
B) the association between hydrogen of one molecule and a region of another molecule which has become negative due to temporary shifts in electron density 
C) the polarity associated with a bond between hydrogen and a small electronegative atom to which it is bonded 
D) the association between a hydrogen atom which is somewhat positive because it is bonded to a small electronegative atom and an atom of O,N or F on another molecule 
E) the temporary attraction between hydrogen atoms on different molecules resulting from shifts in electron density 
A) the unique chemical bonds between hydrogen and any other atom in the same molecule 
B) the association between hydrogen of one molecule and a region of another molecule which has become negative due to temporary shifts in electron density 
C) the polarity associated with a bond between hydrogen and a small electronegative atom to which it is bonded 
D) the association between a hydrogen atom which is somewhat positive because it is bonded to a small electronegative atom and an atom of O,N or F on another molecule 
E) the temporary attraction between hydrogen atoms on different molecules resulting from shifts in electron density

Question 7

A sample of CO2 gas at 100.°C has a volume of 250.mL at 760.mm Hg.How many moles of CO2 are present?

Accepted Answer

A) 0.00816 mol 
B) 0.0304 mol 
C) 6.20 mol 
D) 8.16 mol 
E) 23.14 mol 
A) 0.00816 mol 
B) 0.0304 mol 
C) 6.20 mol 
D) 8.16 mol 
E) 23.14 mol

Question 8

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 9

The amount of energy associated with changing a liquid into a gas is called the

Accepted Answer

A) heat of vaporization. 
B) heat of fusion. 
C) heat of combustion. 
D) joule. 
E) calorie. 
A) heat of vaporization. 
B) heat of fusion. 
C) heat of combustion. 
D) joule. 
E) calorie.

Question 10

A sample of helium has a volume of 480 mL at 47.0°C and 740 mm Hg.The temperature is lowered to 22.0°C and the pressure to 625 mm Hg.What is the new volume?

Accepted Answer

A) 266 mL 
B) 373 mL 
C) 524 mL 
D) 616 mL 
E) 1214 mL 
A) 266 mL 
B) 373 mL 
C) 524 mL 
D) 616 mL 
E) 1214 mL

Question 11

What would be the new pressure if a 400 mL gas sample at 380 mm Hg is expanded to 800 mL with no change in temperature?

Accepted Answer

A) 190 mm Hg 
B) 380 mm Hg 
C) 570 mm Hg 
D) 760 mm Hg 
E) 950 mm Hg 
A) 190 mm Hg 
B) 380 mm Hg 
C) 570 mm Hg 
D) 760 mm Hg 
E) 950 mm Hg

Question 12

How will the volume of a fixed sample of gas change if its pressure is doubled and the Kelvin temperature is doubled?

Accepted Answer

A) The change cannot be determined without more specific information. 
B) It will double. 
C) It will increase by a factor of 4. 
D) It will decrease by a factor of 2. 
E) It will not change. 
A) The change cannot be determined without more specific information. 
B) It will double. 
C) It will increase by a factor of 4. 
D) It will decrease by a factor of 2. 
E) It will not change.

Question 13

Calculate the volume of a 3.50 mol sample of carbon dioxide at 30.0°C and 0.900 atm.

Accepted Answer

A) 8.54 × 10-4 L 
B) 2.20 L 
C) 9.58 L 
D) 96.7 L 
E) 421 L 
A) 8.54 × 10-4 L 
B) 2.20 L 
C) 9.58 L 
D) 96.7 L 
E) 421 L

Question 14

What is the total pressure of a mixture of He and H2 if the partial pressures are 320 mm Hg and 800 mm Hg respectively?

Accepted Answer

A) 40 mm Hg 
B) 60 mm Hg 
C) 320 mm Hg 
D) 480 mm Hg 
E) 1120 mm Hg 
A) 40 mm Hg 
B) 60 mm Hg 
C) 320 mm Hg 
D) 480 mm Hg 
E) 1120 mm Hg

Question 15

Which measurement represents the smallest value of pressure?

Accepted Answer

A) 0.750 atm 
B) 785 mm Hg 
C) 755 torr 
D) 22.0 psi 
E) 100 kPa 
A) 0.750 atm 
B) 785 mm Hg 
C) 755 torr 
D) 22.0 psi 
E) 100 kPa

Question 16

Which is not a correct statement of Boyle's Law?

Accepted Answer

A) For a gas sample at constant temperature,pressure and volume are inversely proportional. 
B) pressure α 1/volume 
C) pressure × volume = a constant 
D) P1V1 = P2V2 
E) none of the above 
A) For a gas sample at constant temperature,pressure and volume are inversely proportional. 
B) pressure α 1/volume 
C) pressure × volume = a constant 
D) P1V1 = P2V2 
E) none of the above

Question 17

List the five types of solids and at least two physical properties of each.Explain how the interparticle forces in that solid determine the properties you listed.

Accepted Answer

Ionic solid:
Any two of brittle; crystal

Question 18

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 19

Volume and pressure are ________ proportional.

Accepted Answer

A) directly 
B) inversely 
C) all of the above 
D) none of the above 
A) directly 
B) inversely 
C) all of the above 
D) none of the above

Question 20

If the temperature of a 1.75 liter sample of gas is changed from 30.0°C to 20.0°C at constant pressure,what will be the new volume?

Accepted Answer

A) 1.17 L 
B) 1.57 L 
C) 1.69 L 
D) 1.81 L 
E) 2.63 L 
A) 1.17 L 
B) 1.57 L 
C) 1.69 L 
D) 1.81 L 
E) 2.63 L

Exam 8: Gases, liquids, and Solids

Which pair of molecules has the strongest dipole-dipole interactions?

For the following reaction,if 11.2 L of nitrogen are reacted to form NH3 at STP,how many liters of hydrogen will be required to completely consume all of the nitrogen? N2 + 3H2 → 2NH3

What will be the new volume when 128 mL of gas at 20.0°C is heated to 40.0°C while pressure remains unchanged?

If a 0.614 g sample of a gas maintains a pressure of 238 mm Hg when contained in a 1.0 L flask at 0.0°C,what is the gas's molecular weight?

Which transformation is melting?

Which is the best description of hydrogen bonding?

A sample of CO2 gas at 100.°C has a volume of 250.mL at 760.mm Hg.How many moles of CO2 are present?

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?

The amount of energy associated with changing a liquid into a gas is called the

A sample of helium has a volume of 480 mL at 47.0°C and 740 mm Hg.The temperature is lowered to 22.0°C and the pressure to 625 mm Hg.What is the new volume?

What would be the new pressure if a 400 mL gas sample at 380 mm Hg is expanded to 800 mL with no change in temperature?

How will the volume of a fixed sample of gas change if its pressure is doubled and the Kelvin temperature is doubled?

Calculate the volume of a 3.50 mol sample of carbon dioxide at 30.0°C and 0.900 atm.

What is the total pressure of a mixture of He and H2 if the partial pressures are 320 mm Hg and 800 mm Hg respectively?

Which measurement represents the smallest value of pressure?

Which is not a correct statement of Boyle's Law?

List the five types of solids and at least two physical properties of each.Explain how the interparticle forces in that solid determine the properties you listed.

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

Volume and pressure are ________ proportional.

If the temperature of a 1.75 liter sample of gas is changed from 30.0°C to 20.0°C at constant pressure,what will be the new volume?

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

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

For the following reaction,if 11.2 L of nitrogen are reacted to form NH₃ at STP,how many liters of hydrogen will be required to completely consume all of the nitrogen? N₂ + 3H₂ → 2NH₃

A sample of CO₂ gas at 100.°C has a volume of 250.mL at 760.mm Hg.How many moles of CO₂ are present?

What is the total pressure of a mixture of He and H₂ if the partial pressures are 320 mm Hg and 800 mm Hg respectively?

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