Question 1

What is the ratio of the average speed of SO2 molecules to that of oxygen molecules at 298 K?

Accepted Answer

A)    :   
B)    :   
C) 2:1 
D) 1:2 
E) 1:1 
A)    :   
B)    :   
C) 2:1 
D) 1:2 
E) 1:1

Question 2

What volume of gaseous oxygen,O2,has the same moles of gas as 3 L of argon gas at the same temperature and pressure?

Accepted Answer

A) 9 L 
B) 1 L 
C) 3 L 
D) 1.5 L 
E) 6 L 
A) 9 L 
B) 1 L 
C) 3 L 
D) 1.5 L 
E) 6 L

Question 3

A particular gas exerts a pressure of 4.09 × 104 Pa.What is this pressure in units of atmospheres?​

Accepted Answer

A) ​0.403 atm 
B) ​4.04 × 109 atm 
C) ​0.414 atm 
D) 0.409 ​atm 
E) 4.14​ × 109 atm 
A) ​0.403 atm 
B) ​4.04 × 109 atm 
C) ​0.414 atm 
D) 0.409 ​atm 
E) 4.14​ × 109 atm

Question 4

A particular gas exerts a pressure of 4.33 bar.What is this pressure in units of atmospheres?

Accepted Answer

A) 4.38 atm 
B) 3.25 × 103 atm 
C) 3.33 × 103 atm 
D) 4.27 atm 
E) 4.33 atm 
A) 4.38 atm 
B) 3.25 × 103 atm 
C) 3.33 × 103 atm 
D) 4.27 atm 
E) 4.33 atm

Question 5

What is the pressure of a 34.8-L gas sample containing 7.45 mol of gas at 19.9°C? (R = 0.0821 L • atm/(K • mol),1 atm = 760 torr)

Accepted Answer

A) 2.66 × 102 mmHg 
B) 6.77× 10-3 mmHg 
C) 5.14 mmHg 
D) 3.91 × 103 mmHg 
E) 1.48 × 102 mmHg 
A) 2.66 × 102 mmHg 
B) 6.77× 10-3 mmHg 
C) 5.14 mmHg 
D) 3.91 × 103 mmHg 
E) 1.48 × 102 mmHg

Question 6

What volume of ammonia gas,measured at 547.9 mmHg and 27.6oC,is required to produce 8.98 g of ammonium sulfate according to the following balanced chemical equation?
2NH3(g)+ H2SO4(aq)→ (NH4)2SO4(s)

Accepted Answer

A) 0.000992 L 
B) 0.00397 L 
C) 1.16 L 
D) 18 L 
E) 4.65 L 
A) 0.000992 L 
B) 0.00397 L 
C) 1.16 L 
D) 18 L 
E) 4.65 L

Question 7

A flexible vessel is filled to a certain pressure with 28.00 L of gas.Under conditions of constant temperature and moles of gas,how does the pressure of the gas change when the volume of the gas is tripled?

Accepted Answer

A) The pressure decreases by a factor of three. 
B) The pressure increases by a factor of two. 
C) The pressure remains the same. 
D) The pressure decreases by a factor of two. 
E) The pressure decreases by a factor of four. 
A) The pressure decreases by a factor of three. 
B) The pressure increases by a factor of two. 
C) The pressure remains the same. 
D) The pressure decreases by a factor of two. 
E) The pressure decreases by a factor of four.

Question 8

At 320 K and 16 atm pressure,the molar volume of ammonia,NH3,is about 10% less than the molar volume of an ideal gas.The best explanation for actual volume being this much smaller than ideal volume is that

Accepted Answer

A) the intermolecular forces of attraction become significant at this temperature and this pressure. 
B) the critical temperature and pressure of NH3 (405 K and 112 atm)are too close to the actual temperature and pressure of the NH3 above. 
C) at this high temperature,a significant amount of NH3 decomposes to N2 and H2. 
D) ammonia is a real gas and not an ideal gas. 
E) the volume occupied by the NH3 molecules themselves is significant at this high concentration. 
A) the intermolecular forces of attraction become significant at this temperature and this pressure. 
B) the critical temperature and pressure of NH3 (405 K and 112 atm)are too close to the actual temperature and pressure of the NH3 above. 
C) at this high temperature,a significant amount of NH3 decomposes to N2 and H2. 
D) ammonia is a real gas and not an ideal gas. 
E) the volume occupied by the NH3 molecules themselves is significant at this high concentration.

Question 9

For an ideal gas,which of the following statements is true?

Accepted Answer

A) P is inversely proportional to n at constant V and T. 
B) V is inversely proportional to T at constant n and P. 
C) V is inversely proportional to n at constant P and T. 
D) n is inversely proportional to T at constant P and V. 
E) P is inversely proportional to T at constant n and V. 
A) P is inversely proportional to n at constant V and T. 
B) V is inversely proportional to T at constant n and P. 
C) V is inversely proportional to n at constant P and T. 
D) n is inversely proportional to T at constant P and V. 
E) P is inversely proportional to T at constant n and V.

Question 10

From a consideration of the van der Waals constants for water and sulfur dioxide,
A (atm⋅L2/mol2)
B (L/mol)
H2O
5)54
0)0305
SO2
6)87
0)0568
We can conclude that

Accepted Answer

A) H2O molecules are smaller and less attracted to each other than SO2 molecules. 
B) H2O molecules are larger and less attracted to each other than SO2 molecules. 
C) H2O molecules are larger and more attracted to each other than SO2 molecules. 
D) H2O molecules are equivalent to SO2 molecules in size and attraction to each other. 
E) H2O molecules are smaller and more attracted to each other than SO2 molecules. 
A) H2O molecules are smaller and less attracted to each other than SO2 molecules. 
B) H2O molecules are larger and less attracted to each other than SO2 molecules. 
C) H2O molecules are larger and more attracted to each other than SO2 molecules. 
D) H2O molecules are equivalent to SO2 molecules in size and attraction to each other. 
E) H2O molecules are smaller and more attracted to each other than SO2 molecules.

Question 11

The volume of a sample of gas measured at 35.0°C and 1.00 atm pressure is 2.00 L.What must the final temperature be in order for the gas to have a final volume of 3.00 L at 1.00 atm pressure?

Accepted Answer

A) 189.0°C 
B) 52.5°C 
C) -220.5°C 
D) 23.3°C 
E) -67.7°C 
A) 189.0°C 
B) 52.5°C 
C) -220.5°C 
D) 23.3°C 
E) -67.7°C

Question 12

A 3.74-L cylinder contains 4.17 g of methane,CH4,at a pressure of 3020 mmHg.What is the temperature of the gas?

Accepted Answer

A) 696°C 
B) 423°C 
C) 969°C 
D) 2900°C 
E) 129°C 
A) 696°C 
B) 423°C 
C) 969°C 
D) 2900°C 
E) 129°C

Question 13

The following volume-temperature plots were made at different values of constant pressure while the number of moles of gas in each experiment remained the same.Which plot represents measurements at the highest pressure?

Accepted Answer

A) B 
B) C 
C) A 
D) They are all at the same pressure. 
E) D 
A) B 
B) C 
C) A 
D) They are all at the same pressure. 
E) D

Question 14

An unknown gaseous hydrocarbon consists of 85.63% carbon by mass.A 0.959-g sample of the gas occupies a volume of 0.51 L at STP.What is the identity of the gas?

Accepted Answer

A) C3H6 
B) C4H8 
C) C5H10 
D) CH2 
E) C2H4 
A) C3H6 
B) C4H8 
C) C5H10 
D) CH2 
E) C2H4

Question 15

A particular gas exerts a pressure of 2.42 atm.What is this pressure in units of mmHg?

Accepted Answer

A) 2.38 mmHg 
B) 1.84 × 103 mmHg 
C) 2.45 mmHg 
D) 3.18 × 10-3 mmHg 
E) 1.86 × 103 mmHg 
A) 2.38 mmHg 
B) 1.84 × 103 mmHg 
C) 2.45 mmHg 
D) 3.18 × 10-3 mmHg 
E) 1.86 × 103 mmHg

Question 16

A given mass of gas occupies a volume of 4.00 L at 60°C and 550 mmHg.Which of the following mathematical expressions will yield its temperature at 2.50 L and 900 mmHg?

Accepted Answer

A) ​   
B) ​   
C)    
D)    
E)    
A) ​   
B) ​   
C)    
D)    
E)

Question 17

What is the partial pressure of carbon dioxide in a container that contains 3.63 mol of oxygen,1.49 mol of nitrogen,and 4.49 mol of carbon dioxide when the total pressure is 871 mmHg?

Accepted Answer

A) 329 mmHg 
B) 763 mmHg 
C) 135 mmHg 
D) 406 mmHg 
E) 871 mmHg 
A) 329 mmHg 
B) 763 mmHg 
C) 135 mmHg 
D) 406 mmHg 
E) 871 mmHg

Question 18

The volume of 1 mol of nitrogen

Accepted Answer

A) is lower than that of 1mol ammonia at high pressures. 
B) is decreased by decreasing the pressure of the gas. 
C) has the value of 22.4 L at 0°C and 1.00 atm. 
D) is decreased by increasing its kinetic energy. 
E) is increased by decreasing the temperature. 
A) is lower than that of 1mol ammonia at high pressures. 
B) is decreased by decreasing the pressure of the gas. 
C) has the value of 22.4 L at 0°C and 1.00 atm. 
D) is decreased by increasing its kinetic energy. 
E) is increased by decreasing the temperature.

Question 19

A particular gas exerts a pressure of 2.52 bar.What is this pressure in units of pascals?

Accepted Answer

A) ​2.49 × 105 Pa 
B) ​2.52 × 10-5 Pa 
C) ​2.52 × 105 Pa 
D) ​2.55 × 105 Pa 
E) ​2.49 × 10-5 Pa 
A) ​2.49 × 105 Pa 
B) ​2.52 × 10-5 Pa 
C) ​2.52 × 105 Pa 
D) ​2.55 × 105 Pa 
E) ​2.49 × 10-5 Pa

Question 20

Which of the following gases will have the slowest rate of effusion at constant temperature?

Accepted Answer

A) H2 
B) F2 
C) Ne 
D) SO3 
E) CF4 
A) H2 
B) F2 
C) Ne 
D) SO3 
E) CF4

Exam 5: The Gaseous State

What is the ratio of the average speed of SO2 molecules to that of oxygen molecules at 298 K?

What volume of gaseous oxygen,O2,has the same moles of gas as 3 L of argon gas at the same temperature and pressure?

A particular gas exerts a pressure of 4.09 × 104 Pa.What is this pressure in units of atmospheres?​

A particular gas exerts a pressure of 4.33 bar.What is this pressure in units of atmospheres?

What is the pressure of a 34.8-L gas sample containing 7.45 mol of gas at 19.9°C? (R = 0.0821 L • atm/(K • mol),1 atm = 760 torr)

What volume of ammonia gas,measured at 547.9 mmHg and 27.6oC,is required to produce 8.98 g of ammonium sulfate according to the following balanced chemical equation? 2NH3(g)+ H2SO4(aq)→ (NH4)2SO4(s)

A flexible vessel is filled to a certain pressure with 28.00 L of gas.Under conditions of constant temperature and moles of gas,how does the pressure of the gas change when the volume of the gas is tripled?

At 320 K and 16 atm pressure,the molar volume of ammonia,NH3,is about 10% less than the molar volume of an ideal gas.The best explanation for actual volume being this much smaller than ideal volume is that

For an ideal gas,which of the following statements is true?

From a consideration of the van der Waals constants for water and sulfur dioxide, A (atm⋅L2/mol2) B (L/mol) H2O 5)54 0)0305 SO2 6)87 0)0568 We can conclude that

The volume of a sample of gas measured at 35.0°C and 1.00 atm pressure is 2.00 L.What must the final temperature be in order for the gas to have a final volume of 3.00 L at 1.00 atm pressure?

A 3.74-L cylinder contains 4.17 g of methane,CH4,at a pressure of 3020 mmHg.What is the temperature of the gas?

The following volume-temperature plots were made at different values of constant pressure while the number of moles of gas in each experiment remained the same.Which plot represents measurements at the highest pressure?

An unknown gaseous hydrocarbon consists of 85.63% carbon by mass.A 0.959-g sample of the gas occupies a volume of 0.51 L at STP.What is the identity of the gas?

A particular gas exerts a pressure of 2.42 atm.What is this pressure in units of mmHg?

A given mass of gas occupies a volume of 4.00 L at 60°C and 550 mmHg.Which of the following mathematical expressions will yield its temperature at 2.50 L and 900 mmHg?

What is the partial pressure of carbon dioxide in a container that contains 3.63 mol of oxygen,1.49 mol of nitrogen,and 4.49 mol of carbon dioxide when the total pressure is 871 mmHg?

The volume of 1 mol of nitrogen

A particular gas exerts a pressure of 2.52 bar.What is this pressure in units of pascals?

Which of the following gases will have the slowest rate of effusion at constant temperature?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

What is the ratio of the average speed of SO₂ molecules to that of oxygen molecules at 298 K?

What volume of gaseous oxygen,O₂,has the same moles of gas as 3 L of argon gas at the same temperature and pressure?

A particular gas exerts a pressure of 4.09 × 10⁴ Pa.What is this pressure in units of atmospheres?

What volume of ammonia gas,measured at 547.9 mmHg and 27.6^oC,is required to produce 8.98 g of ammonium sulfate according to the following balanced chemical equation? 2NH₃(g)+ H₂SO₄(aq)→ (NH₄)₂SO₄(s)

At 320 K and 16 atm pressure,the molar volume of ammonia,NH₃,is about 10% less than the molar volume of an ideal gas.The best explanation for actual volume being this much smaller than ideal volume is that

From a consideration of the van der Waals constants for water and sulfur dioxide, A (atm⋅L²/mol²) B (L/mol) H₂O 5)54 0)0305 SO₂ 6)87 0)0568 We can conclude that

A 3.74-L cylinder contains 4.17 g of methane,CH₄,at a pressure of 3020 mmHg.What is the temperature of the gas?