Question 1

When the pressure and temperature are held constant,the volume of a gas is inversely proportional to the number of moles present.

Accepted Answer

A) True 
 B)False  False

Question 2

Air pressure at the bottom of Death Valley,at 282 ft below sea level,is 776 mm Hg. What are the partial pressures of O2 and N2,which compose 21% and 78% of the atmosphere,respectively?

Accepted Answer

A) 210 mm Hg O2 and 780 mm Hg N2 
B) 160 mm Hg O2 and 610 mm Hg N2 
C) 160 mm Hg O2 and 590 mm Hg N2 
D) 163 mm Hg O2 and 613 mm Hg N2 
A) 210 mm Hg O2 and 780 mm Hg N2 
B) 160 mm Hg O2 and 610 mm Hg N2 
C) 160 mm Hg O2 and 590 mm Hg N2 
D) 163 mm Hg O2 and 613 mm Hg N2 B

Question 3

When 88.4 g of hydrogen gas is put in a 25.8-L container at 300. K,the pressure will be 83.7 atm.

Accepted Answer

A) True 
 B)False  False

Question 4

Two molecules of dimethyl ether,whose structure is shown below,are capable of hydrogen bonding with each other.

Accepted Answer

A) True 
 B)False

Question 5

Charles's law can be used to explain the dangerous condition for scuba divers called "the bends," which is caused by the formation of nitrogen gas bubbles in the bloodstream.

Accepted Answer

A) True 
 B)False

Question 6

Which molecule(s)exhibit hydrogen bonding?

Accepted Answer

A) H2S 
B) CH4 
C) NH3 
D) HCl 
E) All of the molecules exhibit London dispersion forces. 
A) H2S 
B) CH4 
C) NH3 
D) HCl 
E) All of the molecules exhibit London dispersion forces.

Question 7

When a sample of gas is heated from 80 °C to 160 °C at a constant pressure,the volume of the gas doubles.

Accepted Answer

A) True 
 B)False

Question 8

The type(s)of intermolecular forces exhibited by methane molecules,CH4,is/are ________.

Accepted Answer

London dispersion fo

Question 9

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 10

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

Question 11

Which cylinder at STP will contain the greatest mass of gas particles?

Accepted Answer

A) a 5.0-L cylinder of neon 
B) a 5.0-L cylinder of helium 
C) a 5.0-L cylinder of nitrogen 
D) a 5.0-L cylinder of hydrogen 
E) All of the cylinders contain the same mass of gas particles. 
A) a 5.0-L cylinder of neon 
B) a 5.0-L cylinder of helium 
C) a 5.0-L cylinder of nitrogen 
D) a 5.0-L cylinder of hydrogen 
E) All of the cylinders contain the same mass of gas particles.

Question 12

Atmospheric pressure in interstellar space is approximately 1 × 10-17 torr at a temperature of -173 °C. How many gas molecules are present in 25,000 L of interstellar space (about the volume of a bedroom)?

Accepted Answer

A) 2 × 107 molecules 
B) 4 × 10-17 molecules 
C) 2 × 1010 molecules 
D) 3 × 10-14 molecules 
A) 2 × 107 molecules 
B) 4 × 10-17 molecules 
C) 2 × 1010 molecules 
D) 3 × 10-14 molecules

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

Which molecule has the lowest surface tension?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 15

A 22.4 g sample of O2 will occupy less than 22.4 L at STP.

Accepted Answer

A) True 
 B)False

Question 16

If 225 cal of heat is added to 15.0 g of 2-propanol at room temperature,25ºC,the ethanol will reach a final temperature of ________ ºC. The specific heat of 2-propanol is 0.612 cal/(g•ºC).

Accepted Answer

The answer of If 225 cal of heat is added...

Question 17

Which cylinder at STP will contain the greatest number of gas particles?

Accepted Answer

A) a 5.0-L cylinder of neon 
B) a 5.0-L cylinder of helium 
C) a 5.0-L cylinder of nitrogen 
D) a 5.0-L cylinder of hydrogen 
E) All of the cylinders contain the same number of gas particles. 
A) a 5.0-L cylinder of neon 
B) a 5.0-L cylinder of helium 
C) a 5.0-L cylinder of nitrogen 
D) a 5.0-L cylinder of hydrogen 
E) All of the cylinders contain the same number of gas particles.

Question 18

Consider the balanced reaction: Zn(s)+ 2 HCl(aq)→ ZnCl2(aq)+ H2(g). What volume of H2(g)at STP can be generated when 134 g of zinc reacts?

Accepted Answer

A) 2.05 L 
B) 45.9 L 
C) 5.98 L 
D) 3.00 × 103 L 
A) 2.05 L 
B) 45.9 L 
C) 5.98 L 
D) 3.00 × 103 L

Question 19

The pressure of a gas is proportional to its Kelvin temperature at constant volume and number of moles. Therefore increasing the temperature increases the pressure.

Accepted Answer

A) True 
 B)False

Question 20

Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose,what volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C? 2 H2O2(l)→ 2 H2O(l)+ O2(g)

Accepted Answer

A) 1.9 L of O2 
B) 2.8 L of O2 
C) 24 L of O2 
D) 36 L of O2 
E) 73 L of O2 
A) 1.9 L of O2 
B) 2.8 L of O2 
C) 24 L of O2 
D) 36 L of O2 
E) 73 L of O2

Exam 7: Gases,liquids,and Solids

When the pressure and temperature are held constant,the volume of a gas is inversely proportional to the number of moles present.

Air pressure at the bottom of Death Valley,at 282 ft below sea level,is 776 mm Hg. What are the partial pressures of O2 and N2,which compose 21% and 78% of the atmosphere,respectively?

When 88.4 g of hydrogen gas is put in a 25.8-L container at 300. K,the pressure will be 83.7 atm.

Two molecules of dimethyl ether,whose structure is shown below,are capable of hydrogen bonding with each other.

Charles's law can be used to explain the dangerous condition for scuba divers called "the bends," which is caused by the formation of nitrogen gas bubbles in the bloodstream.

Which molecule(s)exhibit hydrogen bonding?

When a sample of gas is heated from 80 °C to 160 °C at a constant pressure,the volume of the gas doubles.

The type(s)of intermolecular forces exhibited by methane molecules,CH4,is/are ________.

Which gas sample contains the largest number of moles?

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?

Which cylinder at STP will contain the greatest mass of gas particles?

Atmospheric pressure in interstellar space is approximately 1 × 10-17 torr at a temperature of -173 °C. How many gas molecules are present in 25,000 L of interstellar space (about the volume of a bedroom)?

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

Which molecule has the lowest surface tension?

A 22.4 g sample of O2 will occupy less than 22.4 L at STP.

If 225 cal of heat is added to 15.0 g of 2-propanol at room temperature,25ºC,the ethanol will reach a final temperature of ________ ºC. The specific heat of 2-propanol is 0.612 cal/(g•ºC).

Which cylinder at STP will contain the greatest number of gas particles?

Consider the balanced reaction: Zn(s)+ 2 HCl(aq)→ ZnCl2(aq)+ H2(g). What volume of H2(g)at STP can be generated when 134 g of zinc reacts?

The pressure of a gas is proportional to its Kelvin temperature at constant volume and number of moles. Therefore increasing the temperature increases the pressure.

Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose,what volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C? 2 H2O2(l)→ 2 H2O(l)+ O2(g)

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

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

Filters

Air pressure at the bottom of Death Valley,at 282 ft below sea level,is 776 mm Hg. What are the partial pressures of O₂ and N₂,which compose 21% and 78% of the atmosphere,respectively?

The type(s)of intermolecular forces exhibited by methane molecules,CH₄,is/are ________.

Atmospheric pressure in interstellar space is approximately 1 × 10^-17 torr at a temperature of -173 °C. How many gas molecules are present in 25,000 L of interstellar space (about the volume of a bedroom)?

A 22.4 g sample of O₂ will occupy less than 22.4 L at STP.

Consider the balanced reaction: Zn(s)+ 2 HCl(aq)→ ZnCl₂(aq)+ H₂(g). What volume of H₂(g)at STP can be generated when 134 g of zinc reacts?

Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose,what volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C? 2 H₂O₂(l)→ 2 H₂O(l)+ O₂(g)