Question 1

The addition of 2.0 g He(g)to a vessel of 10.0 L fixed volume already containing O2(g)at 25 °C and 740 mmHg will:

Accepted Answer

A) have no effect on the final gas pressure 
B) cause the final pressure to exceed 2 atm 
C) produce a 20% increase in gas pressure 
D) bring the final pressure to just slightly more than 1 atm 
E) cause the final pressure to exceed 4 atm 
A) have no effect on the final gas pressure 
B) cause the final pressure to exceed 2 atm 
C) produce a 20% increase in gas pressure 
D) bring the final pressure to just slightly more than 1 atm 
E) cause the final pressure to exceed 4 atm B

Question 2

Convert to the equivalent pressure in atmospheres,

Accepted Answer

A) 4.26 atm 
B) 4.38 × 1010 atm 
C) 4.26 × 103 atm 
D) 3.31 × 105 atm 
E) 0.235 atm 
A) 4.26 atm 
B) 4.38 × 1010 atm 
C) 4.26 × 103 atm 
D) 3.31 × 105 atm 
E) 0.235 atm A

Question 3

Halothane (CHBrClCF3)is one of the modern anesthetics that is nonflammable and relatively safe for patients.What is the density of halothane in grams per liter at  
And 805 Torr?

Accepted Answer

A) 8.64 g/L 
B) 7.68 g/L 
C) 6.55 × 103 g/L 
D) 19.3 g/L 
E) 0.130 g/L 
A) 8.64 g/L 
B) 7.68 g/L 
C) 6.55 × 103 g/L 
D) 19.3 g/L 
E) 0.130 g/L A

Question 4

Diethyl ether (CH3CH2OCH2CH3)was the first general anesthetic.It was first used in 1846 for surgical procedures.What is the density in g/L of diethyl ether at 27 °C and 1.11 atm?

Accepted Answer

A) 37.1 g/L 
B) 2.03 × 103 g/L 
C) 2.71 g/L 
D) 3.34 g/L 
E) 0.299 g/L 
A) 37.1 g/L 
B) 2.03 × 103 g/L 
C) 2.71 g/L 
D) 3.34 g/L 
E) 0.299 g/L

Question 5

Calculate the height in meters of a column of liquid glycerol (d = 1.26 g/cm3)required to exert the same pressure as 760 mmHg (d = 13.60 g/cm3).

Accepted Answer

A) 8.20 m 
B) 8.20 × 103 m 
C) 70.4 m 
D) 0.704 m 
E) 44.4 m 
A) 8.20 m 
B) 8.20 × 103 m 
C) 70.4 m 
D) 0.704 m 
E) 44.4 m

Question 6

Liquid mercury freezes at a temperature of -39 °C.The freezing point of mercury on the Kelvin scale is 234 K.

Accepted Answer

A) True 
 B)False

Question 7

Calculate urms,in m/s,for H2(g)molecules at 30 °C.

Accepted Answer

A) 6.09 × 102 m/s 
B) 5.26 × 103 m/s 
C) 6.12 × 101 m/s 
D) 1.94 × 103 m/s 
E) 2.74 × 103 m/s 
A) 6.09 × 102 m/s 
B) 5.26 × 103 m/s 
C) 6.12 × 101 m/s 
D) 1.94 × 103 m/s 
E) 2.74 × 103 m/s

Question 8

If gas volume is doubled but the temperature remains constant:

Accepted Answer

A) the pressure stays the same 
B) the molecules move faster 
C) the final pressure is twice the pressure before the volume change. 
D) the molecules move slower 
E) the final pressure is 1/2 of the pressure before the volume change. 
A) the pressure stays the same 
B) the molecules move faster 
C) the final pressure is twice the pressure before the volume change. 
D) the molecules move slower 
E) the final pressure is 1/2 of the pressure before the volume change.

Question 9

The relationship between the "absolute temperature" on the Kelvin scale and the Celsius temperature is given by:

Accepted Answer

A) T(K)= t(°
C) + 273.15 
B) t(°
C) = T(K)+ 273.15 
C) T(K)= 5/8[t(°
C) ] - 32 
D) T(K)= 8/5[t(°
C) ] + 32 
E) t(°
C) = 98.6 + T(K) 
A) T(K)= t(°
C) + 273.15 
B) t(°
C) = T(K)+ 273.15 
C) T(K)= 5/8[t(°
C) ] - 32 
D) T(K)= 8/5[t(°
C) ] + 32 
E) t(°
C) = 98.6 + T(K)

Question 10

In which of the following cases is the gas most likely to behave as an ideal gas?

Accepted Answer

A) H2O(g),375 K,750 Torr 
B) He(g),37.5 K,7500 Torr 
C) CH4(g),37.5 °C,7.5 atm 
D) Ne(g),375 °C,0.75 atm 
E) SF6,-37.5 °C,0.75 atm 
A) H2O(g),375 K,750 Torr 
B) He(g),37.5 K,7500 Torr 
C) CH4(g),37.5 °C,7.5 atm 
D) Ne(g),375 °C,0.75 atm 
E) SF6,-37.5 °C,0.75 atm

Question 11

What is the density of carbon dioxide gas at -15 °C and 728 Torr?

Accepted Answer

A) 2.17 g L-1  
B) 2.08 g L-1  
C) 1.99 g L-1  
D) 1.84 g L-1  
E) 1.27 g L-1  
A) 2.17 g L-1  
B) 2.08 g L-1  
C) 1.99 g L-1  
D) 1.84 g L-1  
E) 1.27 g L-1

Question 12

A sample of helium gas occupies a volume of 38 L at 780 torr and 25 °C.What volume would the gas occupy at 0 °C and 1 atm?

Accepted Answer

A) 40 L 
B) 38 L 
C) 36 L 
D) 34 L 
E) 25 L 
A) 40 L 
B) 38 L 
C) 36 L 
D) 34 L 
E) 25 L

Question 13

At 27 °C and 750 Torr,both a 16 g sample of methane gas (CH4)and a 16 g sample of oxygen gas (O2)will have the same:

Accepted Answer

A) average molecular velocities 
B) average molecular kinetic energies 
C) number of gaseous particles 
D) total gaseous volumes 
E) average effusion rates 
A) average molecular velocities 
B) average molecular kinetic energies 
C) number of gaseous particles 
D) total gaseous volumes 
E) average effusion rates

Question 14

If 0.50 mole H2(g)and 1.0 mole He(g)are compared at standard temperature and pressure,the two gases will:

Accepted Answer

A) have equal effusion rates 
B) have equal average molecular velocities 
C) have equal average molecular kinetic energies 
D) occupy equal volumes 
E) have equal weights 
A) have equal effusion rates 
B) have equal average molecular velocities 
C) have equal average molecular kinetic energies 
D) occupy equal volumes 
E) have equal weights

Question 15

A gaseous hydrocarbon weighing 0.290 g occupies a volume of 125 mL at 25 °C and 760 mmHg.What is the molar mass of this compound?

Accepted Answer

A) 113 g/mol 
B) 4.76 × 103 g/mol 
C) 43.1 g/mol 
D) 10.5 g/mol 
E) 56.7 g/mol 
A) 113 g/mol 
B) 4.76 × 103 g/mol 
C) 43.1 g/mol 
D) 10.5 g/mol 
E) 56.7 g/mol

Question 16

Two containers are connected by an open tube.One container (A)is at 300 K,the other (B)is at 600 K.These two containers must have:

Accepted Answer

A) equal number of moles 
B) greater pressure in A than B 
C) greater pressure in B than A 
D) equal volume 
E) none of these 
A) equal number of moles 
B) greater pressure in A than B 
C) greater pressure in B than A 
D) equal volume 
E) none of these

Question 17

A 50.0 mL canister of Freon-12 (CF2Cl2)was heated in boiling water (100.0 °C)until the canister burst.If the canister was not defective,and had a burst rating of 103.4 bar,what minimum amount of Freon-12 was in the canister,assuming no volume change before bursting?

Accepted Answer

A) 9.63 g 
B) 11.5 g 
C) 20.2 g 
D) 27.5 g 
E) 75.0 g 
A) 9.63 g 
B) 11.5 g 
C) 20.2 g 
D) 27.5 g 
E) 75.0 g

Question 18

If the pressure in a gas container that is connected to an open-end U-tube manometer is 116 kPa and the pressure of the atmosphere at the open end of the tube is 752 mmHg,the level of mercury in the tube will:

Accepted Answer

A) be 118 mm higher in the arm open to the atmosphere 
B) be 118 mm higher in the arm connected to the gas cylinder 
C) be 870 mm higher in the arm open to the atmosphere 
D) be 870 mm higher in the arm connected to the gas cylinder 
A) be 118 mm higher in the arm open to the atmosphere 
B) be 118 mm higher in the arm connected to the gas cylinder 
C) be 870 mm higher in the arm open to the atmosphere 
D) be 870 mm higher in the arm connected to the gas cylinder

Question 19

An automobile tire at 32.0 psi at 25.0 °C is driven on a trip.At the end of the trip the pressure is 35.0 psi.What is the temperature of the tire in degrees Celsius?

Accepted Answer

A) 27.3 °C 
B) 22.8 °C 
C) 52.9 °C 
D) 57.0 °C 
E) 60.0 °C 
A) 27.3 °C 
B) 22.8 °C 
C) 52.9 °C 
D) 57.0 °C 
E) 60.0 °C

Question 20

Consider the following reaction:
N2(g)+ 3 H2(g)→ 2 NH3(g)
What volume of NH3(g)can be produced from 200.0 L of H2(g)if the gases are measured at 350 °C and 400 atm pressure?

Accepted Answer

A) 300.0 L 
B) 66.7 L 
C) 133.3 L 
D) 400.0 L 
E) 200.0 L 
A) 300.0 L 
B) 66.7 L 
C) 133.3 L 
D) 400.0 L 
E) 200.0 L

Exam 6: Gases

The addition of 2.0 g He(g)to a vessel of 10.0 L fixed volume already containing O2(g)at 25 °C and 740 mmHg will:

Convert to the equivalent pressure in atmospheres,

Halothane (CHBrClCF3)is one of the modern anesthetics that is nonflammable and relatively safe for patients.What is the density of halothane in grams per liter at And 805 Torr?

Diethyl ether (CH3CH2OCH2CH3)was the first general anesthetic.It was first used in 1846 for surgical procedures.What is the density in g/L of diethyl ether at 27 °C and 1.11 atm?

Calculate the height in meters of a column of liquid glycerol (d = 1.26 g/cm3)required to exert the same pressure as 760 mmHg (d = 13.60 g/cm3).

Liquid mercury freezes at a temperature of -39 °C.The freezing point of mercury on the Kelvin scale is 234 K.

Calculate urms,in m/s,for H2(g)molecules at 30 °C.

If gas volume is doubled but the temperature remains constant:

The relationship between the "absolute temperature" on the Kelvin scale and the Celsius temperature is given by:

In which of the following cases is the gas most likely to behave as an ideal gas?

What is the density of carbon dioxide gas at -15 °C and 728 Torr?

A sample of helium gas occupies a volume of 38 L at 780 torr and 25 °C.What volume would the gas occupy at 0 °C and 1 atm?

At 27 °C and 750 Torr,both a 16 g sample of methane gas (CH4)and a 16 g sample of oxygen gas (O2)will have the same:

If 0.50 mole H2(g)and 1.0 mole He(g)are compared at standard temperature and pressure,the two gases will:

A gaseous hydrocarbon weighing 0.290 g occupies a volume of 125 mL at 25 °C and 760 mmHg.What is the molar mass of this compound?

Two containers are connected by an open tube.One container (A)is at 300 K,the other (B)is at 600 K.These two containers must have:

A 50.0 mL canister of Freon-12 (CF2Cl2)was heated in boiling water (100.0 °C)until the canister burst.If the canister was not defective,and had a burst rating of 103.4 bar,what minimum amount of Freon-12 was in the canister,assuming no volume change before bursting?

If the pressure in a gas container that is connected to an open-end U-tube manometer is 116 kPa and the pressure of the atmosphere at the open end of the tube is 752 mmHg,the level of mercury in the tube will:

An automobile tire at 32.0 psi at 25.0 °C is driven on a trip.At the end of the trip the pressure is 35.0 psi.What is the temperature of the tire in degrees Celsius?

Consider the following reaction: N2(g)+ 3 H2(g)→ 2 NH3(g) What volume of NH3(g)can be produced from 200.0 L of H2(g)if the gases are measured at 350 °C and 400 atm pressure?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

The addition of 2.0 g He(g)to a vessel of 10.0 L fixed volume already containing O₂(g)at 25 °C and 740 mmHg will:

Halothane (CHBrClCF₃)is one of the modern anesthetics that is nonflammable and relatively safe for patients.What is the density of halothane in grams per liter at And 805 Torr?

Diethyl ether (CH₃CH₂OCH₂CH₃)was the first general anesthetic.It was first used in 1846 for surgical procedures.What is the density in g/L of diethyl ether at 27 °C and 1.11 atm?

Calculate the height in meters of a column of liquid glycerol (d = 1.26 g/cm³)required to exert the same pressure as 760 mmHg (d = 13.60 g/cm^3).

Calculate u_rms,in m/s,for H₂(g)molecules at 30 °C.

At 27 °C and 750 Torr,both a 16 g sample of methane gas (CH₄)and a 16 g sample of oxygen gas (O₂)will have the same:

If 0.50 mole H₂(g)and 1.0 mole He(g)are compared at standard temperature and pressure,the two gases will:

A 50.0 mL canister of Freon-12 (CF₂Cl₂)was heated in boiling water (100.0 °C)until the canister burst.If the canister was not defective,and had a burst rating of 103.4 bar,what minimum amount of Freon-12 was in the canister,assuming no volume change before bursting?

Consider the following reaction: N₂(g)+ 3 H₂(g)→ 2 NH₃(g) What volume of NH₃(g)can be produced from 200.0 L of H₂(g)if the gases are measured at 350 °C and 400 atm pressure?