Question 1

At STP, 1 mole of gas has a molar volume of 22.4 L.What is the density (g/L)of oxygen at STP?

Accepted Answer

The answer of At STP, 1 mole of gas has...

Question 2

Calculate the density of SO2 gas, in grams per liter, at 55°C and 1.5 atm.

Accepted Answer

Question 3

At standard temperature and pressure, a given sample of water vapor occupies a volume of 2.80 L.How many moles of water vapor are present?

Accepted Answer

The answer of At standard temperature and pressure, a given...

Question 4

Calculate the density of Br2(g)at 59.0°C and 1.00 atm pressure.

Accepted Answer

A) 3.45 g/L 
B) 5.83 g/L 
C) 22.4 g/L 
D) 27.2 g/L 
E) 769 g/L 
A) 3.45 g/L 
B) 5.83 g/L 
C) 22.4 g/L 
D) 27.2 g/L 
E) 769 g/L

Question 5

How many atoms of Ar gas are present in a 340 mL container at 55 °C and 720 mmHg?

Accepted Answer

A) 0.012 Ar atoms 
B) 7.2 x 1021 Ar atoms 
C) 4.3 x 1022 Ar atoms 
D) 2.9 x 1023 Ar atoms 
E) 1.7 x 1024 Ar atoms 
A) 0.012 Ar atoms 
B) 7.2 x 1021 Ar atoms 
C) 4.3 x 1022 Ar atoms 
D) 2.9 x 1023 Ar atoms 
E) 1.7 x 1024 Ar atoms

Question 6

Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.

Accepted Answer

A) 0.263 g 
B) 2.46 g 
C) 3.80 g 
D) 35.2 g 
E) 206 g 
A) 0.263 g 
B) 2.46 g 
C) 3.80 g 
D) 35.2 g 
E) 206 g

Question 7

Calculate the density, in g/L, of chlorine (Cl2)gas at STP.

Accepted Answer

A) 2.13 × 10-2 g/L 
B) 1.58 g/L 
C) 3.16 g/L 
D) 46.9 g/L 
E) 0.316 kg/L 
A) 2.13 × 10-2 g/L 
B) 1.58 g/L 
C) 3.16 g/L 
D) 46.9 g/L 
E) 0.316 kg/L

Question 8

A sample of carbon monoxide gas was collected in a 2.0 L flask by displacing water at 28°C and 810 mmHg.Calculate the number of CO molecules in the flask.The vapor pressure of water at 28°C is 28.3 mmHg.

Accepted Answer

A) 5.0 × 1022 
B) 5.2 × 1022 
C) 3.8 × 1023 
D) 5.4 × 1023 
E) 3.8 × 1025 
A) 5.0 × 1022 
B) 5.2 × 1022 
C) 3.8 × 1023 
D) 5.4 × 1023 
E) 3.8 × 1025

Question 9

Liquid nitrogen has a density of 0.807 g/mL at -195.8 °C.If 1.00 L of N2(l)is allowed to warm to 25°C at a pressure of 1.00 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

Accepted Answer

A) 59.1 L 
B) 182 L 
C) 705 L 
D) 1.41 × 103 L 
E) 1.97 × 104 L 
A) 59.1 L 
B) 182 L 
C) 705 L 
D) 1.41 × 103 L 
E) 1.97 × 104 L

Question 10

Which statement is false?

Accepted Answer

A) The average kinetic energies of molecules from samples of different "ideal" gases is the same at the same temperature. 
B) The molecules of an ideal gas are relatively far apart. 
C) All molecules of an ideal gas have the same kinetic energy at constant temperature. 
D) Molecules of a gas undergo many collisions with each other and the container walls. 
E) Molecules of greater mass have a lower average speed than those of less mass at the same temperature. 
A) The average kinetic energies of molecules from samples of different "ideal" gases is the same at the same temperature. 
B) The molecules of an ideal gas are relatively far apart. 
C) All molecules of an ideal gas have the same kinetic energy at constant temperature. 
D) Molecules of a gas undergo many collisions with each other and the container walls. 
E) Molecules of greater mass have a lower average speed than those of less mass at the same temperature.

Question 11

Which one of these gases is "lighter-than-air"?

Accepted Answer

A) Cl2 
B) SO2 
C) PH3 
D) NO2 
E) Ne 
A) Cl2 
B) SO2 
C) PH3 
D) NO2 
E) Ne

Question 12

The following data describes an initial and final state for an ideal gas.Given that the amount of gas does not change in the process, what is the final volume (mL)of the gas?

Accepted Answer

The answer of The following data describes an initial and...

Question 13

A sample of pure oxygen gas has a pressure of 795 torr.What is the pressure of the oxygen in units of atmospheres?

Accepted Answer

A) 0.795 atm 
B) 1.05 atm 
C) 0.604 atm 
D) 0.760 atm 
E) 1.01 atm 
A) 0.795 atm 
B) 1.05 atm 
C) 0.604 atm 
D) 0.760 atm 
E) 1.01 atm

Question 14

A mixture of three gases has a total pressure of 1,380 mmHg at 298 K.The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar.What is the partial pressure of Ar?

Accepted Answer

A) 0.258 atm 
B) 301 mmHg 
C) 356 mmHg 
D) 5,345 mmHg 
E) 8,020 mmHg 
A) 0.258 atm 
B) 301 mmHg 
C) 356 mmHg 
D) 5,345 mmHg 
E) 8,020 mmHg

Question 15

Deviations from the ideal gas law are greater at

Accepted Answer

A) low temperatures and low pressures. 
B) low temperatures and high pressures. 
C) high temperatures and high pressures. 
D) high temperatures and low pressures. 
A) low temperatures and low pressures. 
B) low temperatures and high pressures. 
C) high temperatures and high pressures. 
D) high temperatures and low pressures.

Question 16

Which of the following statements is consistent with Boyle's Law concerning an ideal gas?

Accepted Answer

A) At constant temperature and moles, a plot of volume versus pressure is linear. 
B) At constant pressure and volume, a plot of temperature versus moles is linear. 
C) At constant pressure and moles, a plot of temperature versus volume is linear. 
D) At constant temperature and moles, a plot of pressure versus the inverse of volume is linear. 
E) At constant temperature and pressure, a plot of moles versus volume is linear. 
A) At constant temperature and moles, a plot of volume versus pressure is linear. 
B) At constant pressure and volume, a plot of temperature versus moles is linear. 
C) At constant pressure and moles, a plot of temperature versus volume is linear. 
D) At constant temperature and moles, a plot of pressure versus the inverse of volume is linear. 
E) At constant temperature and pressure, a plot of moles versus volume is linear.

Question 17

Today is a beautiful day for a picnic in the mountains, so we seal our peanut butter sandwich in a plastic sandwich bag at the base of the mountain.The approximate volume of the sandwich bag not occupied by the sandwich is 200.mL.The pressure at the base of the mountain is 1.0 atm.If the pressure at the top of the mountain is 0.80 atm, what is the final volume (mL)of gas in our sandwich bag?

Accepted Answer

The answer of Today is a beautiful day for a...

Question 18

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100.cm3 at 95°C, and 1,000.mmHg.

Accepted Answer

A) 0.19 g/mol 
B) 35.3 g/mol 
C) 70.9 g/mol 
D) 137 g/mol 
E) 384 g/mol 
A) 0.19 g/mol 
B) 35.3 g/mol 
C) 70.9 g/mol 
D) 137 g/mol 
E) 384 g/mol

Question 19

Calculate the grams of SO2 gas present at STP in a 5.9 L container.

Accepted Answer

A) 0.24 g 
B) 0.26 g 
C) 15 g 
D) 17 g 
E) 64 g 
A) 0.24 g 
B) 0.26 g 
C) 15 g 
D) 17 g 
E) 64 g

Question 20

A block of dry ice (solid CO2, density = 1.56 g/mL)of dimensions 25.0 cm × 25.0 cm × 25.0 cm is left to sublime (i.e.to pass from the solid phase to the gas phase)in a closed chamber of dimensions 4.00 m × 5.00 m × 3.00 m.The partial pressure of carbon dioxide in this chamber at 25°C will be

Accepted Answer

A) 0.171 mmHg 
B) 0.225 mmHg 
C) 14.4 mmHg 
D) 107 mmHg 
E) 171 mmHg 
A) 0.171 mmHg 
B) 0.225 mmHg 
C) 14.4 mmHg 
D) 107 mmHg 
E) 171 mmHg

Exam 5: Gases

At STP, 1 mole of gas has a molar volume of 22.4 L.What is the density (g/L)of oxygen at STP?

Calculate the density of SO2 gas, in grams per liter, at 55°C and 1.5 atm.

At standard temperature and pressure, a given sample of water vapor occupies a volume of 2.80 L.How many moles of water vapor are present?

Calculate the density of Br2(g)at 59.0°C and 1.00 atm pressure.

How many atoms of Ar gas are present in a 340 mL container at 55 °C and 720 mmHg?

Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.

Calculate the density, in g/L, of chlorine (Cl2)gas at STP.

A sample of carbon monoxide gas was collected in a 2.0 L flask by displacing water at 28°C and 810 mmHg.Calculate the number of CO molecules in the flask.The vapor pressure of water at 28°C is 28.3 mmHg.

Liquid nitrogen has a density of 0.807 g/mL at -195.8 °C.If 1.00 L of N2(l)is allowed to warm to 25°C at a pressure of 1.00 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

Which statement is false?

Which one of these gases is "lighter-than-air"?

The following data describes an initial and final state for an ideal gas.Given that the amount of gas does not change in the process, what is the final volume (mL)of the gas?

A sample of pure oxygen gas has a pressure of 795 torr.What is the pressure of the oxygen in units of atmospheres?

A mixture of three gases has a total pressure of 1,380 mmHg at 298 K.The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar.What is the partial pressure of Ar?

Deviations from the ideal gas law are greater at

Which of the following statements is consistent with Boyle's Law concerning an ideal gas?

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100.cm3 at 95°C, and 1,000.mmHg.

Calculate the grams of SO2 gas present at STP in a 5.9 L container.

A block of dry ice (solid CO2, density = 1.56 g/mL)of dimensions 25.0 cm × 25.0 cm × 25.0 cm is left to sublime (i.e.to pass from the solid phase to the gas phase)in a closed chamber of dimensions 4.00 m × 5.00 m × 3.00 m.The partial pressure of carbon dioxide in this chamber at 25°C will be

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Calculate the density of SO₂ gas, in grams per liter, at 55°C and 1.5 atm.

Calculate the density of Br₂(g)at 59.0°C and 1.00 atm pressure.

Calculate the density, in g/L, of chlorine (Cl₂)gas at STP.

Liquid nitrogen has a density of 0.807 g/mL at -195.8 °C.If 1.00 L of N₂(l)is allowed to warm to 25°C at a pressure of 1.00 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

A mixture of three gases has a total pressure of 1,380 mmHg at 298 K.The mixture is analyzed and is found to contain 1.27 mol CO₂, 3.04 mol CO, and 1.50 mol Ar.What is the partial pressure of Ar?

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100.cm³ at 95°C, and 1,000.mmHg.

Calculate the grams of SO₂ gas present at STP in a 5.9 L container.

A block of dry ice (solid CO₂, density = 1.56 g/mL)of dimensions 25.0 cm × 25.0 cm × 25.0 cm is left to sublime (i.e.to pass from the solid phase to the gas phase)in a closed chamber of dimensions 4.00 m × 5.00 m × 3.00 m.The partial pressure of carbon dioxide in this chamber at 25°C will be