Question 1

How many liters does 3.336 g of nitrogen dioxide occupy at 30.1°C and 2.1 atm of pressure? The value of R = 0.0821 L atm mol-1 K-1.

Accepted Answer

A)  0.075 L 
B)  0.086 L 
C)  0.86 L 
D)  4.0 L 
E)  40 L 
A)  0.075 L 
B)  0.086 L 
C)  0.86 L 
D)  4.0 L 
E)  40 L

Question 2

A sample of chlorine gas (Cl2) occupies 1.65 L at 1.0 atm and 308 K. What pressure (in mm Hg) will the sample exert at 3.00 L and 51.0 °C?

Accepted Answer

A)  0.579 mm Hg 
B)  69.2 mm Hg 
C)  397 mm Hg 
D)  440 mm Hg 
E)  579 mm Hg 
A)  0.579 mm Hg 
B)  69.2 mm Hg 
C)  397 mm Hg 
D)  440 mm Hg 
E)  579 mm Hg

Question 3

Which correctly describes the relationship between the applied pressure on a gas and its volume at constant temperature?

Accepted Answer

A)  as one increases the other increases 
B)  they are unrelated 
C)  they are directly proportional 
D)  they are irreversibly proportional 
E)  they are inversely proportional 
A)  as one increases the other increases 
B)  they are unrelated 
C)  they are directly proportional 
D)  they are irreversibly proportional 
E)  they are inversely proportional

Question 4

A 125.0-mL contains a gas at 27°C and 760 mm Hg of pressure. The gas is pumped into an empty 1.50-L flask also at a temperature of 27°C. What is the pressure (in atm) of the gas in the new flask?

Accepted Answer

A)  0.0833 atm 
B)  63.3 atm 
C)  83.3 atm 
D)  63300 atm 
E)  12.0 atm 
A)  0.0833 atm 
B)  63.3 atm 
C)  83.3 atm 
D)  63300 atm 
E)  12.0 atm

Question 5

A 4.35-g sample of gas has a density of 1.45 g/L when placed in a 3.00-L container at 21.0°C and 1.25 atm. What is a possible molecular formula of the gas? The value of R = 0.0821 L atm mol-1 K-1.

Accepted Answer

A)  CH4 
B)  Cl2 
C)  CO 
D)  O2 
E)  NO 
A)  CH4 
B)  Cl2 
C)  CO 
D)  O2 
E)  NO

Question 6

Which statement about greenhouse gases and global warming is false?

Accepted Answer

A)  Global warming increases with increased carbon dioxide in the atmosphere. 
B)  Planting trees would reduce atmospheric carbon dioxide. 
C)  Global warming can cause flooding, weather changes, and changes in agricultural patterns. 
D)  Human activity is the sole source of atmospheric carbon dioxide. 
E)  Computer models are used to predict future global temperature changes. 
A)  Global warming increases with increased carbon dioxide in the atmosphere. 
B)  Planting trees would reduce atmospheric carbon dioxide. 
C)  Global warming can cause flooding, weather changes, and changes in agricultural patterns. 
D)  Human activity is the sole source of atmospheric carbon dioxide. 
E)  Computer models are used to predict future global temperature changes.

Question 7

What is the pressure of 2.50 mol of CO2 in a 1.00-L flask at 298K when calculated using the van der Waals equation? For CO2, the values of the van der Waals constants are a = 3.59 L2-atm/mol2 and b = 0.0427 L/mol.

Accepted Answer

A)  5.74 
B)  46.0 
C)  59.5 
D)  61.1 
E)  68.5 
A)  5.74 
B)  46.0 
C)  59.5 
D)  61.1 
E)  68.5

Question 8

Suppose that in a known volume of He there are 6.022 × 1023 molecules (4.00 g) present at 1.00 atm and 0°C. How many molecules and how many grams of Cl2 are there under the same conditions?

Accepted Answer

A)  6.022 × 1023 molecules and 35.45 g 
B)  1.00 molecules and 4.00 g 
C)  6.022 × 1023 molecules and 70.90 g 
D)  2(6.022 × 1023) molecules and 35.45 g 
E)  8(6.022 × 1023) molecules and 70.90 g 
A)  6.022 × 1023 molecules and 35.45 g 
B)  1.00 molecules and 4.00 g 
C)  6.022 × 1023 molecules and 70.90 g 
D)  2(6.022 × 1023) molecules and 35.45 g 
E)  8(6.022 × 1023) molecules and 70.90 g

Question 9

How are the pressure and the absolute temperature of a gas related for a given number of moles at constant volume?

Accepted Answer

A)  They are exactly opposites. 
B)  They are not related. 
C)  They are directly proportional. 
D)  They are indirectly proportional. 
E)  Not enough information is given to determine the relationship. 
A)  They are exactly opposites. 
B)  They are not related. 
C)  They are directly proportional. 
D)  They are indirectly proportional. 
E)  Not enough information is given to determine the relationship.

Question 10

Suppose that at STP a gas occupies 10.2 L. At what temperature (°C) will the same gas occupy 15000 mL at 1550 torr?

Accepted Answer

A)  -273 °C 
B)  1.22 × 10-3 °C 
C)  545 °C 
D)  6.22 × 105 °C 
E)  undefined due to division by zero 
A)  -273 °C 
B)  1.22 × 10-3 °C 
C)  545 °C 
D)  6.22 × 105 °C 
E)  undefined due to division by zero

Question 11

Which statement about ideal gases and the gas laws is false?

Accepted Answer

A)  Most gases are ideal or almost ideal gases at room temperature and atmospheric pressure. 
B)  The laws are summarized as equations that describe the behavior of ideal gases. 
C)  Variables that appear in the laws are temperature, pressure, volume, and amount of gas. 
D)  A gas will behave ideally under all conditions. 
E)  The laws describe the macroscopic behavior of ideal gases. 
A)  Most gases are ideal or almost ideal gases at room temperature and atmospheric pressure. 
B)  The laws are summarized as equations that describe the behavior of ideal gases. 
C)  Variables that appear in the laws are temperature, pressure, volume, and amount of gas. 
D)  A gas will behave ideally under all conditions. 
E)  The laws describe the macroscopic behavior of ideal gases.

Question 12

What volume (in L) of oxygen at 298K and 1.50 atm is required for the complete combustion of 25.0 g of hexane? The value of R = 0.0821 L atm mol-1 K-1.

Accepted Answer

A)  4.73 L 
B)  0.397 L 
C)  34.2 L 
D)  45.0 L 
E)  407 L 
A)  4.73 L 
B)  0.397 L 
C)  34.2 L 
D)  45.0 L 
E)  407 L

Question 13

If at 29°C and 2.50 atm of pressure, a gas occupies 5.99 L, what volume (in L) will the same gas occupy at 19°C and 1.20 atm of pressure?

Accepted Answer

A)  2.04 × 10-4 L 
B)  6.04 × 10-1 L 
C)  8.18 L 
D)  12.1 L 
E)  20.0 L 
A)  2.04 × 10-4 L 
B)  6.04 × 10-1 L 
C)  8.18 L 
D)  12.1 L 
E)  20.0 L

Question 14

Hydrochloric acid reacts with magnesium to produce hydrogen gas and magnesium chloride. Reacting magnesium with excess hydrochloric acid produces 1204 mL of hydrogen gas that is collected over water. How many grams of hydrogen gas are produced at 25.0 °C and 1.00 atm? The vapor pressure of water at 25.0 °C is 23.8 mm Hg.

Accepted Answer

A)  9.61 × 10-2 g 
B)  5.87 × 10-1 g 
C)  1.18 g 
D)  4.77 × 10-2 g 
E)  7.24 × 101 g 
A)  9.61 × 10-2 g 
B)  5.87 × 10-1 g 
C)  1.18 g 
D)  4.77 × 10-2 g 
E)  7.24 × 101 g

Question 15

Clean air

Accepted Answer

A)  is pure oxygen. 
B)  contains mostly oxygen, some nitrogen and nothing else. 
C)  contains mostly nitrogen, some oxygen and nothing else. 
D)  contains mostly nitrogen, some oxygen, and a very small amount of several other gases. 
E)  has all of its nitrogen removed. 
A)  is pure oxygen. 
B)  contains mostly oxygen, some nitrogen and nothing else. 
C)  contains mostly nitrogen, some oxygen and nothing else. 
D)  contains mostly nitrogen, some oxygen, and a very small amount of several other gases. 
E)  has all of its nitrogen removed.

Question 16

What is the density (in g/L) of methane (CH4) at 25°C and 1.2 atm of pressure? The value of R = 0.0821 L atm mol-1 K-1.

Accepted Answer

A)  4.90 × 10-2 g/L 
B)  1.20 g/L 
C)  0.787 g/L 
D)  9.9 g/L 
E)  6.21 × 103 g/L 
A)  4.90 × 10-2 g/L 
B)  1.20 g/L 
C)  0.787 g/L 
D)  9.9 g/L 
E)  6.21 × 103 g/L

Question 17

Which is the most abundant gas found in dry air at sea level?

Accepted Answer

A)  H2 
B)  Cl2 
C)  N2 
D)  O2 
E)  Ne 
A)  H2 
B)  Cl2 
C)  N2 
D)  O2 
E)  Ne

How many liters does 3.336 g of nitrogen dioxide occupy at 30.1°C and 2.1 atm of pressure? The value of R = 0.0821 L atm mol^-1 K^-1.

A sample of chlorine gas (Cl₂) occupies 1.65 L at 1.0 atm and 308 K. What pressure (in mm Hg) will the sample exert at 3.00 L and 51.0 °C?

Which correctly describes the relationship between the applied pressure on a gas and its volume at constant temperature?

A 125.0-mL contains a gas at 27°C and 760 mm Hg of pressure. The gas is pumped into an empty 1.50-L flask also at a temperature of 27°C. What is the pressure (in atm) of the gas in the new flask?

A 4.35-g sample of gas has a density of 1.45 g/L when placed in a 3.00-L container at 21.0°C and 1.25 atm. What is a possible molecular formula of the gas? The value of R = 0.0821 L atm mol^-1 K^-1.

Which statement about greenhouse gases and global warming is false?

What is the pressure of 2.50 mol of CO₂ in a 1.00-L flask at 298K when calculated using the van der Waals equation? For CO₂, the values of the van der Waals constants are a = 3.59 L²-atm/mol² and b = 0.0427 L/mol.

Suppose that in a known volume of He there are 6.022 × 10²³ molecules (4.00 g) present at 1.00 atm and 0°C. How many molecules and how many grams of Cl₂ are there under the same conditions?

How are the pressure and the absolute temperature of a gas related for a given number of moles at constant volume?

Suppose that at STP a gas occupies 10.2 L. At what temperature (°C) will the same gas occupy 15000 mL at 1550 torr?

Which statement about ideal gases and the gas laws is false?

What volume (in L) of oxygen at 298K and 1.50 atm is required for the complete combustion of 25.0 g of hexane? The value of R = 0.0821 L atm mol^-1 K^-1.

If at 29°C and 2.50 atm of pressure, a gas occupies 5.99 L, what volume (in L) will the same gas occupy at 19°C and 1.20 atm of pressure?

Clean air

What is the density (in g/L) of methane (CH₄) at 25°C and 1.2 atm of pressure? The value of R = 0.0821 L atm mol^-1 K^-1.

Which is the most abundant gas found in dry air at sea level?

The Nature of Chemistry

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Covalent Bonding

Molecular Structure

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Chemical Kinetics: Rates of Reactions

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Additional Aqueous Equilibria

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Exam 10: Gases and the Atmosphere

How many liters does 3.336 g of nitrogen dioxide occupy at 30.1°C and 2.1 atm of pressure? The value of R = 0.0821 L atm mol-1 K-1.

A sample of chlorine gas (Cl2) occupies 1.65 L at 1.0 atm and 308 K. What pressure (in mm Hg) will the sample exert at 3.00 L and 51.0 °C?

Which correctly describes the relationship between the applied pressure on a gas and its volume at constant temperature?

A 125.0-mL contains a gas at 27°C and 760 mm Hg of pressure. The gas is pumped into an empty 1.50-L flask also at a temperature of 27°C. What is the pressure (in atm) of the gas in the new flask?

A 4.35-g sample of gas has a density of 1.45 g/L when placed in a 3.00-L container at 21.0°C and 1.25 atm. What is a possible molecular formula of the gas? The value of R = 0.0821 L atm mol-1 K-1.

Which statement about greenhouse gases and global warming is false?

What is the pressure of 2.50 mol of CO2 in a 1.00-L flask at 298K when calculated using the van der Waals equation? For CO2, the values of the van der Waals constants are a = 3.59 L2-atm/mol2 and b = 0.0427 L/mol.

Suppose that in a known volume of He there are 6.022 × 1023 molecules (4.00 g) present at 1.00 atm and 0°C. How many molecules and how many grams of Cl2 are there under the same conditions?

How are the pressure and the absolute temperature of a gas related for a given number of moles at constant volume?

Suppose that at STP a gas occupies 10.2 L. At what temperature (°C) will the same gas occupy 15000 mL at 1550 torr?

Which statement about ideal gases and the gas laws is false?

What volume (in L) of oxygen at 298K and 1.50 atm is required for the complete combustion of 25.0 g of hexane? The value of R = 0.0821 L atm mol-1 K-1.

If at 29°C and 2.50 atm of pressure, a gas occupies 5.99 L, what volume (in L) will the same gas occupy at 19°C and 1.20 atm of pressure?

Clean air

What is the density (in g/L) of methane (CH4) at 25°C and 1.2 atm of pressure? The value of R = 0.0821 L atm mol-1 K-1.

Which is the most abundant gas found in dry air at sea level?

The Nature of Chemistry

Atoms and Elements

Chemical Compounds

Quantities of Reactants and Products

Chemical Reactions

Energy and Chemical Reactions

Electron Configurations and the Periodic Table

Covalent Bonding

Molecular Structure

Liquids, Solids, and Materials

Chemical Kinetics: Rates of Reactions

Chemical Equilibrium

The Chemistry of Solutes and Solutions

Acids and Bases

Additional Aqueous Equilibria

Thermodynamics: Directionality of Chemical Reactions

Electrochemistry and Its Applications

Nuclear Chemistry

Filters

How many liters does 3.336 g of nitrogen dioxide occupy at 30.1°C and 2.1 atm of pressure? The value of R = 0.0821 L atm mol^-1 K^-1.

A sample of chlorine gas (Cl₂) occupies 1.65 L at 1.0 atm and 308 K. What pressure (in mm Hg) will the sample exert at 3.00 L and 51.0 °C?

A 4.35-g sample of gas has a density of 1.45 g/L when placed in a 3.00-L container at 21.0°C and 1.25 atm. What is a possible molecular formula of the gas? The value of R = 0.0821 L atm mol^-1 K^-1.

What is the pressure of 2.50 mol of CO₂ in a 1.00-L flask at 298K when calculated using the van der Waals equation? For CO₂, the values of the van der Waals constants are a = 3.59 L²-atm/mol² and b = 0.0427 L/mol.

Suppose that in a known volume of He there are 6.022 × 10²³ molecules (4.00 g) present at 1.00 atm and 0°C. How many molecules and how many grams of Cl₂ are there under the same conditions?

What volume (in L) of oxygen at 298K and 1.50 atm is required for the complete combustion of 25.0 g of hexane? The value of R = 0.0821 L atm mol^-1 K^-1.

What is the density (in g/L) of methane (CH₄) at 25°C and 1.2 atm of pressure? The value of R = 0.0821 L atm mol^-1 K^-1.