Question 1

A gaseous substance effuses twice as rapidly as sulfur dioxide gas. The gas could be

Accepted Answer

A) carbon monoxide. 
B) helium. 
C) hydrogen. 
D) methane. 
E) oxygen. 
A) carbon monoxide. 
B) helium. 
C) hydrogen. 
D) methane. 
E) oxygen.

Question 2

An open-end mercury manometer was constructed from a U-shaped tube and connected to a gas container. In a particular measurement, the level in the end of the tube connected to the gas container measured 82.8 cm above the U-neck, while the level in the open end (to the atmosphere)was 17.2 cm above the U-neck. The outside air pressure in the laboratory was measured as 764 torr. What is the pressure in the gas container?

Accepted Answer

A) 108 torr 
B) 159 torr 
C) 698 torr 
D) 830 torr 
E) 1420 torr 
A) 108 torr 
B) 159 torr 
C) 698 torr 
D) 830 torr 
E) 1420 torr

Question 3

For a substance that remains a gas under all the conditions listed, deviations from the expected values found using the ideal gas law would be the greatest at

Accepted Answer

A) 100°C and 1.0 atm. 
B) 0°C and 1.0 atm. 
C) -100°C and 1.0 atm. 
D) -100°C and 3.0 atm. 
E) 100°C and 3.0 atm. 
A) 100°C and 1.0 atm. 
B) 0°C and 1.0 atm. 
C) -100°C and 1.0 atm. 
D) -100°C and 3.0 atm. 
E) 100°C and 3.0 atm.

Question 4

The density of a gas sample was found to be 3.51 g/L. If the volume of the sample was changed from 1.00 L to 0.20 L under constant temperature, what would be the new density of the sample?

Accepted Answer

The answer of The density of a gas sample was...

Question 5

In order for a gas to be truly considered as "ideal,"the molecules of the gas ________ interact with each other and ________ volume.

Accepted Answer

The answer of In order for a gas to be...

Question 6

Mountain climbers often need to take tanks of oxygen with them as they approach higher altitudes. Explain why this oxygen is needed by the climbers.

Accepted Answer

Air becomes "thinner"as higher altitudes

Question 7

The van der Waals equation of state for a real gas is   At what pressure will 1.00 mole of CH4 be in a 10.0 L container at 298 K, assuming that CH4 is a real gas?(van der Waals constants for CH4 are a = 2.253 L2 atm mol-2, b = 0.04278 L mol-1)

Accepted Answer

A) 2.43 atm 
B) 2.28 atm 
C) 2.51 atm 
D) 24.5 atm 
E) 0.440 atm 
A) 2.43 atm 
B) 2.28 atm 
C) 2.51 atm 
D) 24.5 atm 
E) 0.440 atm

Question 8

Which of the following is a condition that must be met for a gas to be considered as "ideal"?

Accepted Answer

A) The gas must contain carbon. 
B) The gas molecule must have no interactive forces between themselves. 
C) The gas sample must not contain water vapor. 
D) The gas sample must be enclosed in a large container. 
E) The gas must have a small molar mass. 
A) The gas must contain carbon. 
B) The gas molecule must have no interactive forces between themselves. 
C) The gas sample must not contain water vapor. 
D) The gas sample must be enclosed in a large container. 
E) The gas must have a small molar mass.

Question 9

A sealed glass container contains partial pressures of 0.24 atm O2, 0.45 atm CO2, 0.64 atm N2, and 0.46 atm H2 gas in a 3.5 L container at 30.5°C. What is the total pressure exerted on the walls of the container?

Accepted Answer

A) 1.79 atm 
B) 6.27 atm 
C) 0.51 atm 
D) 1902 atm 
E) 0.64 atm 
A) 1.79 atm 
B) 6.27 atm 
C) 0.51 atm 
D) 1902 atm 
E) 0.64 atm

Question 10

A gas sample is attached to a closed end mercury manometer. The mercury on the end of the manometer attached to the gas sample is 170 mm lower than the mercury on the closed end. What is the pressure of the gas in the sample?

Accepted Answer

The answer of A gas sample is attached to a...

Question 11

A sample of a gas in a cylindrical chamber with a movable piston occupied a volume of 1.40 liters when the pressure was 762 torr and the temperature was 26.9°C. The volume of the system was readjusted to 0.150 liters by moving the piston. What is the pressure exerted on the surface of the piston by the gas if the temperature of the system remained constant?

Accepted Answer

A) 13.4 atm 
B) 883 atm 
C) 918 atm 
D) 1020 atm 
E) 9.36 atm 
A) 13.4 atm 
B) 883 atm 
C) 918 atm 
D) 1020 atm 
E) 9.36 atm

Question 12

A sample of a gas occupies a volume of 122.4 mL at STP. It was placed in a different vessel with a volume of 164.2 mL in which the pressure was measured as 0.9915 atm. What is its temperature in this new vessel?

Accepted Answer

A) 90.2 °C 
B) 96.4 °C 
C) 123.4 °C 
D) 201.9 °C 
E) 205.4 °C 
A) 90.2 °C 
B) 96.4 °C 
C) 123.4 °C 
D) 201.9 °C 
E) 205.4 °C

Question 13

A sealed glass container contains 0.2 moles of O2 gas and 0.3 moles of N2 gas. If the total pressure inside the container is 0.75 atm what is the partial pressure of O2 in the glass container?

Accepted Answer

A) 0.20 atm 
B) 0.30 atm 
C) 0.50 atm 
D) 0.75 atm 
E) 0.45 atm 
A) 0.20 atm 
B) 0.30 atm 
C) 0.50 atm 
D) 0.75 atm 
E) 0.45 atm

Question 14

Calculate the density of Br2 gas at 59.0°C and 2.00 atm pressure.

Accepted Answer

Question 15

What is the mole fraction of methane in a gaseous mixture that consists of 8.00 g of methane and 12.00 g of ethane (C2H6)in a 3.50 L container maintained at 35.20 °C?

Accepted Answer

A) 0.400 
B) 0.434 
C) 0.556 
D) 0.800 
E) 1.50 
A) 0.400 
B) 0.434 
C) 0.556 
D) 0.800 
E) 1.50

Question 16

A pressure measured using a mercury barometer results in a mercury column height of 356 mm. What column height of water would be needed to measure the same pressure? The density of mercury is 13.6 g/cm3; the density of water is 1.00 g/cm3.

Accepted Answer

A) 52 cm 
B) 484 cm 
C) 26.18 mm 
D) 38.2 cm 
E) 207 cm 
A) 52 cm 
B) 484 cm 
C) 26.18 mm 
D) 38.2 cm 
E) 207 cm

Question 17

A closed-end manometer was constructed from a U-shaped glass tube. It was loaded with mercury so that the closed side was filled all the way to the top, which was 800 mm above the neck, while the open end was at a level 180 mm above the neck. The manometer was taken into a chamber used for training astronauts. What is the highest pressure that can be read with assurance on this manometer?

Accepted Answer

A) 62.0 torr 
B) 62.5 torr 
C) 980 torr 
D) 98.5 torr 
E) 620 torr 
A) 62.0 torr 
B) 62.5 torr 
C) 980 torr 
D) 98.5 torr 
E) 620 torr

Question 18

If container "A"is occupied by 1.00 mole of oxygen gas while container "B"is occupied by 20.0 grams of nitrogen gas and both containers are maintained at 0.00 °C and 650 torr then,

Accepted Answer

A) container "B" must be larger than container "A". 
B) the average speed of the molecules in container "A" is greater than that of the molecules in container "B". 
C) container "A" must have a volume of 22.4 L. 
D) the average kinetic energy of the molecules in "A" is equal to the average kinetic energy of the molecules in "B". 
E) the number of atoms in container "B" is greater than the number of atoms in container "A". 
A) container "B" must be larger than container "A". 
B) the average speed of the molecules in container "A" is greater than that of the molecules in container "B". 
C) container "A" must have a volume of 22.4 L. 
D) the average kinetic energy of the molecules in "A" is equal to the average kinetic energy of the molecules in "B". 
E) the number of atoms in container "B" is greater than the number of atoms in container "A".

Question 19

What is the gas pressure of the gas sample hooked up to the mercury manometer shown below if the atmospheric pressure is 756 mmHg?

Accepted Answer

The answer of What is the gas pressure of the...

Question 20

A gaseous element has a density of 3.195 g L−1 when the temperature is 35.8 °C and the pressure is 734.6 torr. Which element best fits the description?

Accepted Answer

A gaseous substance effuses twice as rapidly as sulfur dioxide gas. The gas could be

For a substance that remains a gas under all the conditions listed, deviations from the expected values found using the ideal gas law would be the greatest at

The density of a gas sample was found to be 3.51 g/L. If the volume of the sample was changed from 1.00 L to 0.20 L under constant temperature, what would be the new density of the sample?

In order for a gas to be truly considered as "ideal,"the molecules of the gas interact with each other and volume.

Mountain climbers often need to take tanks of oxygen with them as they approach higher altitudes. Explain why this oxygen is needed by the climbers.

The van der Waals equation of state for a real gas is At what pressure will 1.00 mole of CH₄ be in a 10.0 L container at 298 K, assuming that CH₄ is a real gas?(van der Waals constants for CH₄ are a = 2.253 L² atm mol^-2, b = 0.04278 L mol^-1)

Which of the following is a condition that must be met for a gas to be considered as "ideal"?

A sealed glass container contains partial pressures of 0.24 atm O₂, 0.45 atm CO₂, 0.64 atm N₂, and 0.46 atm H₂ gas in a 3.5 L container at 30.5°C. What is the total pressure exerted on the walls of the container?

A gas sample is attached to a closed end mercury manometer. The mercury on the end of the manometer attached to the gas sample is 170 mm lower than the mercury on the closed end. What is the pressure of the gas in the sample?

A sample of a gas occupies a volume of 122.4 mL at STP. It was placed in a different vessel with a volume of 164.2 mL in which the pressure was measured as 0.9915 atm. What is its temperature in this new vessel?

A sealed glass container contains 0.2 moles of O₂ gas and 0.3 moles of N₂ gas. If the total pressure inside the container is 0.75 atm what is the partial pressure of O₂ in the glass container?

Calculate the density of Br₂ gas at 59.0°C and 2.00 atm pressure.

What is the mole fraction of methane in a gaseous mixture that consists of 8.00 g of methane and 12.00 g of ethane (C₂H₆)in a 3.50 L container maintained at 35.20 °C?

A pressure measured using a mercury barometer results in a mercury column height of 356 mm. What column height of water would be needed to measure the same pressure? The density of mercury is 13.6 g/cm³; the density of water is 1.00 g/cm³.

If container "A"is occupied by 1.00 mole of oxygen gas while container "B"is occupied by 20.0 grams of nitrogen gas and both containers are maintained at 0.00 °C and 650 torr then,

What is the gas pressure of the gas sample hooked up to the mercury manometer shown below if the atmospheric pressure is 756 mmHg?

A gaseous element has a density of 3.195 g L⁻¹ when the temperature is 35.8 °C and the pressure is 734.6 torr. Which element best fits the description?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

Exam 11: Properties of Gases

A gaseous substance effuses twice as rapidly as sulfur dioxide gas. The gas could be

For a substance that remains a gas under all the conditions listed, deviations from the expected values found using the ideal gas law would be the greatest at

The density of a gas sample was found to be 3.51 g/L. If the volume of the sample was changed from 1.00 L to 0.20 L under constant temperature, what would be the new density of the sample?

In order for a gas to be truly considered as "ideal,"the molecules of the gas ________ interact with each other and ________ volume.

Mountain climbers often need to take tanks of oxygen with them as they approach higher altitudes. Explain why this oxygen is needed by the climbers.

The van der Waals equation of state for a real gas is At what pressure will 1.00 mole of CH4 be in a 10.0 L container at 298 K, assuming that CH4 is a real gas?(van der Waals constants for CH4 are a = 2.253 L2 atm mol-2, b = 0.04278 L mol-1)

Which of the following is a condition that must be met for a gas to be considered as "ideal"?

A sealed glass container contains partial pressures of 0.24 atm O2, 0.45 atm CO2, 0.64 atm N2, and 0.46 atm H2 gas in a 3.5 L container at 30.5°C. What is the total pressure exerted on the walls of the container?

A gas sample is attached to a closed end mercury manometer. The mercury on the end of the manometer attached to the gas sample is 170 mm lower than the mercury on the closed end. What is the pressure of the gas in the sample?

A sample of a gas occupies a volume of 122.4 mL at STP. It was placed in a different vessel with a volume of 164.2 mL in which the pressure was measured as 0.9915 atm. What is its temperature in this new vessel?

A sealed glass container contains 0.2 moles of O2 gas and 0.3 moles of N2 gas. If the total pressure inside the container is 0.75 atm what is the partial pressure of O2 in the glass container?

Calculate the density of Br2 gas at 59.0°C and 2.00 atm pressure.

What is the mole fraction of methane in a gaseous mixture that consists of 8.00 g of methane and 12.00 g of ethane (C2H6)in a 3.50 L container maintained at 35.20 °C?

A pressure measured using a mercury barometer results in a mercury column height of 356 mm. What column height of water would be needed to measure the same pressure? The density of mercury is 13.6 g/cm3; the density of water is 1.00 g/cm3.

If container "A"is occupied by 1.00 mole of oxygen gas while container "B"is occupied by 20.0 grams of nitrogen gas and both containers are maintained at 0.00 °C and 650 torr then,

What is the gas pressure of the gas sample hooked up to the mercury manometer shown below if the atmospheric pressure is 756 mmHg?

A gaseous element has a density of 3.195 g L−1 when the temperature is 35.8 °C and the pressure is 734.6 torr. Which element best fits the description?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

In order for a gas to be truly considered as "ideal,"the molecules of the gas interact with each other and volume.

The van der Waals equation of state for a real gas is At what pressure will 1.00 mole of CH₄ be in a 10.0 L container at 298 K, assuming that CH₄ is a real gas?(van der Waals constants for CH₄ are a = 2.253 L² atm mol^-2, b = 0.04278 L mol^-1)

A sealed glass container contains partial pressures of 0.24 atm O₂, 0.45 atm CO₂, 0.64 atm N₂, and 0.46 atm H₂ gas in a 3.5 L container at 30.5°C. What is the total pressure exerted on the walls of the container?

A sealed glass container contains 0.2 moles of O₂ gas and 0.3 moles of N₂ gas. If the total pressure inside the container is 0.75 atm what is the partial pressure of O₂ in the glass container?

Calculate the density of Br₂ gas at 59.0°C and 2.00 atm pressure.

What is the mole fraction of methane in a gaseous mixture that consists of 8.00 g of methane and 12.00 g of ethane (C₂H₆)in a 3.50 L container maintained at 35.20 °C?

A pressure measured using a mercury barometer results in a mercury column height of 356 mm. What column height of water would be needed to measure the same pressure? The density of mercury is 13.6 g/cm³; the density of water is 1.00 g/cm³.

A gaseous element has a density of 3.195 g L⁻¹ when the temperature is 35.8 °C and the pressure is 734.6 torr. Which element best fits the description?