Question 1

Which will diffuse more rapidly, C3H8 (propane)or C4H10 (butane)? Why?

Accepted Answer

Propane will diffuse

Question 2

A sample of a gas in a cylindrical chamber with a movable piston occupied a volume of 2.86 cubic meters when the pressure was 9.85 × 104 Pa and the temperature was 25.8°C. The pressure was readjusted to 1.08 × 105 Pa by moving the piston. What is the volume occupied by the sample under the new conditions if the temperature remained constant throughout?

Accepted Answer

A) 0.383 m3 
B) 2.61 m3 
C) 3.14 m3 
D) 8.23 m3 
E) 26.1 m3 
A) 0.383 m3 
B) 2.61 m3 
C) 3.14 m3 
D) 8.23 m3 
E) 26.1 m3

Question 3

One pascal is a greater pressure than one torr.

Accepted Answer

A) True 
 B)False

Question 4

Results of measurements on a gas to determine its molecular mass gave a value of 1.614 g L−1 for the density, at 27.2 °C and 749.4 torr. What is the molecular mass of the gas?

Accepted Answer

Question 5

A sample of a gas was isolated in a gas containment bulb on a manifold used in this type work. The volume of the bulb was 1.524 liters. The temperature was 28.40 °C, and the manifold pressure was 637.6 torr. What volume would this gas sample occupy at STP?

Accepted Answer

A) 1.069 L 
B) 1.158 L 
C) 1.412 L 
D) 1.645 L 
E) 2.006 L 
A) 1.069 L 
B) 1.158 L 
C) 1.412 L 
D) 1.645 L 
E) 2.006 L

Question 6

A certain gas behaves as an ideal gas. At a temperature of 25.0 °C and a pressure of 760.0 torr, one mole of this gas occupies a volume of 22.4 liters.

Accepted Answer

A) True 
 B)False

Question 7

A sample of a gas occupies a volume of 1.462 liters at STP. It was placed in a different vessel in which the pressure was measured as 722.5 torr when the temperature was 25.20 °C. What is the volume of this new vessel?

Accepted Answer

A) 1.272 liters 
B) 1.408 liters 
C) 1.518 liters 
D) 1.539 liters 
E) 1.680 liters 
A) 1.272 liters 
B) 1.408 liters 
C) 1.518 liters 
D) 1.539 liters 
E) 1.680 liters

Question 8

The average speed at which a nitrogen molecule effuses at 30.0 °C is 480 meters per second. The average speed at which a butene molecule (C4H8)effuses at this same temperature should therefore be

Accepted Answer

A) 120 m s-1. 
B) 170 m s-1. 
C) 240 m s-1. 
D) 339 m s-1. 
E) 679 m s-1. 
A) 120 m s-1. 
B) 170 m s-1. 
C) 240 m s-1. 
D) 339 m s-1. 
E) 679 m s-1.

Question 9

How many liters of pure oxygen gas, measured at STP, are required for the complete combustion of 16.6 L of ethylene gas (C2H4), also measured at STP?

Accepted Answer

A) 16.6 L 
B) 22.4 L 
C) 24.9 L 
D) 33.2 L 
E) 49.8 L 
A) 16.6 L 
B) 22.4 L 
C) 24.9 L 
D) 33.2 L 
E) 49.8 L

Question 10

A gas sample occupies a volume of 1.264 L when the temperature is 168.0 °C and the pressure is 946.6 torr. How many molecules are in the sample?

Accepted Answer

A) 2.07 × 1022 
B) 2.62 × 1022 
C) 2.65 × 1023 
D) 2.65 × 1024 
E) 6.88 × 1022 
A) 2.07 × 1022 
B) 2.62 × 1022 
C) 2.65 × 1023 
D) 2.65 × 1024 
E) 6.88 × 1022

Question 11

The van der Waals equation of state for a real gas is   At what pressure will 1.00 mole of NH3 be in a 10.00 L container at 298 K, assuming NH3 is a real gas?(van der Waals constants for NH3 are a = 4.170 L2 atm mol-2, b = 0.03707 L mol-1)

Accepted Answer

A) 2.03 atm 
B) 20.3 atm 
C) 2.41 atm 
D) 24.1 atm 
E) 2.47 atm 
A) 2.03 atm 
B) 20.3 atm 
C) 2.41 atm 
D) 24.1 atm 
E) 2.47 atm

Question 12

Gases can have negative volumes when the temperature falls below 0°C.

Accepted Answer

A) True 
 B)False

Question 13

A gas sample containing 0.2820 moles of a compound is trapped in a 2.461 liter vessel at a temperature of 25.2 °C. What is the pressure in the vessel if it behaves as an ideal gas?

Accepted Answer

A) 0.236 atm 
B) 0.374 atm 
C) 2.81 atm 
D) 4.11 atm 
E) 24.0 atm 
A) 0.236 atm 
B) 0.374 atm 
C) 2.81 atm 
D) 4.11 atm 
E) 24.0 atm

Question 14

What is the total pressure exerted by a gaseous mixture that consists of 1.00 g of hydrogen and 8.00 g of neon in a 2.80 L container maintained at 44.10 °C?

Accepted Answer

A) 1.15 atm 
B) 3.77 atm 
C) 3.95 atm 
D) 8.30 atm 
E) 12.9 atm 
A) 1.15 atm 
B) 3.77 atm 
C) 3.95 atm 
D) 8.30 atm 
E) 12.9 atm

Question 15

A sealed glass container contains partial pressures of 0.80 atm CO2 gas and 0.35 atm N2 gas. What is the mole fraction of N2 in the glass container?

Accepted Answer

A) 0.35 
B) 1.15 
C) 0.70 
D) 0.80 
E) 0.30 
A) 0.35 
B) 1.15 
C) 0.70 
D) 0.80 
E) 0.30

Question 16

A sample of a gas occupies a volume of 1.820 liters at STP. What pressure would it exert if transferred to a 1.425-liter vessel in which its temperature was raised to 25.2 °C?

Accepted Answer

A) 0.7168 atm 
B) 0.8552 atm 
C) 1.169 atm 
D) 1.278 atm 
E) 1.395 atm 
A) 0.7168 atm 
B) 0.8552 atm 
C) 1.169 atm 
D) 1.278 atm 
E) 1.395 atm

Question 17

A sample of nitrogen gas was collected by displacement of water in a gas collection flask. The total pressure in the collection flask was measured as 754.2 torr, the temperature was 20.0 °C, and the measured volume of gas collected was 516 mL. How many grams should the nitrogen weigh? (At 20.0 °C, the vapor pressure of water is 17.5 torr.)

Accepted Answer

A) 0.291 g 
B) 0.305 g 
C) 0.582 g 
D) 0.596 g 
E) 0.610 g 
A) 0.291 g 
B) 0.305 g 
C) 0.582 g 
D) 0.596 g 
E) 0.610 g

Question 18

A sample of hydrogen gas was collected by displacement of water in a large gas buret. The total pressure in the buret was measured as 764.2 torr, the temperature was 23.0 °C, and the buret contained 511 mL of the collected gas. How many moles of hydrogen were collected?(At 23.0 °C, the vapor pressure of water is 21.1 torr.)

Accepted Answer

A) 0.0191 moles 
B) 0.0206 moles 
C) 0.0211 moles 
D) 0.0215 moles 
E) 0.0217 moles 
A) 0.0191 moles 
B) 0.0206 moles 
C) 0.0211 moles 
D) 0.0215 moles 
E) 0.0217 moles

Question 19

Complete the following sentence: The molecules of different ideal gas samples have the same average kinetic energies at the same ________.

Accepted Answer

The answer of Complete the following sentence: The molecules of...

Question 20

During a chemical demonstration, a filled balloon is submerged in liquid nitrogen, an extremely cold material. As the balloon sits in the liquid nitrogen, it appears to deflate. However, when the balloon is removed from the nitrogen, it appears to fill again. What is happening to the gas inside the balloon that gives this visual result?

Accepted Answer

This is an example of kinetic molecular

Which will diffuse more rapidly, C₃H₈ (propane)or C₄H₁₀ (butane)? Why?

One pascal is a greater pressure than one torr.

Results of measurements on a gas to determine its molecular mass gave a value of 1.614 g L⁻¹ for the density, at 27.2 °C and 749.4 torr. What is the molecular mass of the gas?

A sample of a gas was isolated in a gas containment bulb on a manifold used in this type work. The volume of the bulb was 1.524 liters. The temperature was 28.40 °C, and the manifold pressure was 637.6 torr. What volume would this gas sample occupy at STP?

A certain gas behaves as an ideal gas. At a temperature of 25.0 °C and a pressure of 760.0 torr, one mole of this gas occupies a volume of 22.4 liters.

A sample of a gas occupies a volume of 1.462 liters at STP. It was placed in a different vessel in which the pressure was measured as 722.5 torr when the temperature was 25.20 °C. What is the volume of this new vessel?

The average speed at which a nitrogen molecule effuses at 30.0 °C is 480 meters per second. The average speed at which a butene molecule (C₄H₈)effuses at this same temperature should therefore be

How many liters of pure oxygen gas, measured at STP, are required for the complete combustion of 16.6 L of ethylene gas (C₂H₄), also measured at STP?

A gas sample occupies a volume of 1.264 L when the temperature is 168.0 °C and the pressure is 946.6 torr. How many molecules are in the sample?

The van der Waals equation of state for a real gas is At what pressure will 1.00 mole of NH₃ be in a 10.00 L container at 298 K, assuming NH₃ is a real gas?(van der Waals constants for NH₃ are a = 4.170 L² atm mol^-2, b = 0.03707 L mol^-1)

Gases can have negative volumes when the temperature falls below 0°C.

A gas sample containing 0.2820 moles of a compound is trapped in a 2.461 liter vessel at a temperature of 25.2 °C. What is the pressure in the vessel if it behaves as an ideal gas?

What is the total pressure exerted by a gaseous mixture that consists of 1.00 g of hydrogen and 8.00 g of neon in a 2.80 L container maintained at 44.10 °C?

A sealed glass container contains partial pressures of 0.80 atm CO₂ gas and 0.35 atm N₂ gas. What is the mole fraction of N₂ in the glass container?

A sample of a gas occupies a volume of 1.820 liters at STP. What pressure would it exert if transferred to a 1.425-liter vessel in which its temperature was raised to 25.2 °C?

Complete the following sentence: The molecules of different ideal gas samples have the same average kinetic energies at the same ________.

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

Which will diffuse more rapidly, C3H8 (propane)or C4H10 (butane)? Why?

One pascal is a greater pressure than one torr.

Results of measurements on a gas to determine its molecular mass gave a value of 1.614 g L−1 for the density, at 27.2 °C and 749.4 torr. What is the molecular mass of the gas?

A sample of a gas was isolated in a gas containment bulb on a manifold used in this type work. The volume of the bulb was 1.524 liters. The temperature was 28.40 °C, and the manifold pressure was 637.6 torr. What volume would this gas sample occupy at STP?

A certain gas behaves as an ideal gas. At a temperature of 25.0 °C and a pressure of 760.0 torr, one mole of this gas occupies a volume of 22.4 liters.

A sample of a gas occupies a volume of 1.462 liters at STP. It was placed in a different vessel in which the pressure was measured as 722.5 torr when the temperature was 25.20 °C. What is the volume of this new vessel?

The average speed at which a nitrogen molecule effuses at 30.0 °C is 480 meters per second. The average speed at which a butene molecule (C4H8)effuses at this same temperature should therefore be

How many liters of pure oxygen gas, measured at STP, are required for the complete combustion of 16.6 L of ethylene gas (C2H4), also measured at STP?

A gas sample occupies a volume of 1.264 L when the temperature is 168.0 °C and the pressure is 946.6 torr. How many molecules are in the sample?

The van der Waals equation of state for a real gas is At what pressure will 1.00 mole of NH3 be in a 10.00 L container at 298 K, assuming NH3 is a real gas?(van der Waals constants for NH3 are a = 4.170 L2 atm mol-2, b = 0.03707 L mol-1)

Gases can have negative volumes when the temperature falls below 0°C.

A gas sample containing 0.2820 moles of a compound is trapped in a 2.461 liter vessel at a temperature of 25.2 °C. What is the pressure in the vessel if it behaves as an ideal gas?

What is the total pressure exerted by a gaseous mixture that consists of 1.00 g of hydrogen and 8.00 g of neon in a 2.80 L container maintained at 44.10 °C?

A sealed glass container contains partial pressures of 0.80 atm CO2 gas and 0.35 atm N2 gas. What is the mole fraction of N2 in the glass container?

A sample of a gas occupies a volume of 1.820 liters at STP. What pressure would it exert if transferred to a 1.425-liter vessel in which its temperature was raised to 25.2 °C?

Complete the following sentence: The molecules of different ideal gas samples have the same average kinetic energies at the same ________.

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

Which will diffuse more rapidly, C₃H₈ (propane)or C₄H₁₀ (butane)? Why?

Results of measurements on a gas to determine its molecular mass gave a value of 1.614 g L⁻¹ for the density, at 27.2 °C and 749.4 torr. What is the molecular mass of the gas?

The average speed at which a nitrogen molecule effuses at 30.0 °C is 480 meters per second. The average speed at which a butene molecule (C₄H₈)effuses at this same temperature should therefore be

How many liters of pure oxygen gas, measured at STP, are required for the complete combustion of 16.6 L of ethylene gas (C₂H₄), also measured at STP?

The van der Waals equation of state for a real gas is At what pressure will 1.00 mole of NH₃ be in a 10.00 L container at 298 K, assuming NH₃ is a real gas?(van der Waals constants for NH₃ are a = 4.170 L² atm mol^-2, b = 0.03707 L mol^-1)

A sealed glass container contains partial pressures of 0.80 atm CO₂ gas and 0.35 atm N₂ gas. What is the mole fraction of N₂ in the glass container?