Question 1

In Boyle's Law,

Accepted Answer

A) volume is inversely proportional to pressure. 
B) volume is proportional to pressure. 
C) pressure is inversely proportional to temperature. 
D) volume is proportional to temperature. 
A) volume is inversely proportional to pressure. 
B) volume is proportional to pressure. 
C) pressure is inversely proportional to temperature. 
D) volume is proportional to temperature.

Question 2

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

Accepted Answer

A) 10.2 atm 
B) 9.83 atm 
C) 15.3 atm 
D) 6.53 atm 
E) 1.05 atm 
A) 10.2 atm 
B) 9.83 atm 
C) 15.3 atm 
D) 6.53 atm 
E) 1.05 atm

Question 3

Zinc reacts with aqueous sulfuric acid to form hydrogen gas:
Zn(s)+ H2SO4(aq)→ ZnSO4(aq)+ H2(g)
In an experiment,225 mL of wet H2 is collected over water at 27°C and a barometric pressure of 748 torr.How many grams of Zn have been consumed? The vapor pressure of water at 27°C is 26.74 torr.

Accepted Answer

A) 4.79 × 106 
B) 0.567 
C) 567 
D) 431 
E) 4.31 × 105 
A) 4.79 × 106 
B) 0.567 
C) 567 
D) 431 
E) 4.31 × 105

Question 4

A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L)the gas will occupy when the temperature is increased to 121°C while maintaining the pressure at 629 torr.

Accepted Answer

A) 10.9 L 
B) 13.2 L 
C) 2.07 L 
D) 7.56 L 
E) 48.4 L 
A) 10.9 L 
B) 13.2 L 
C) 2.07 L 
D) 7.56 L 
E) 48.4 L

Question 5

Define diffusion.

Accepted Answer

Diffusion is the process by wh

Question 6

Determine the mass of water formed when 12.5 L NH3 (at 298 K and 1.50 atm)is reacted with 18.9 L of O2 (at 323 K and 1.1 atm).
4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(g)

Accepted Answer

A) 17.0 g H2O 
B) 20.7 g H2O 
C) 37.7 g H2O 
D) 13.8 g H2O 
E) 27.9 g H2O 
A) 17.0 g H2O 
B) 20.7 g H2O 
C) 37.7 g H2O 
D) 13.8 g H2O 
E) 27.9 g H2O

Question 7

Identify the molecule that effuses the fastest.

Accepted Answer

A) CO 
B) Ar 
C) CH4 
D) CO2 
A) CO 
B) Ar 
C) CH4 
D) CO2

Question 8

A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg.What volume of gas will the balloon contain at 1.35 atm and 253 K?

Accepted Answer

A) 22.2 L 
B) 87.5 L 
C) 11.4 L 
D) 45.0 L 
E) 58.6 L 
A) 22.2 L 
B) 87.5 L 
C) 11.4 L 
D) 45.0 L 
E) 58.6 L

Question 9

Which is not an assumption in the kinetic molecular theory for gases?

Accepted Answer

A) The volume occupied the gas molecules is negligible compared to the volume of the container. 
B) The average kinetic energy of gas molecules is proportional to the Kelvin temperature 
C) The collision of one gas molecule with another (or with the walls)is completely elastic. 
D) Gas molecules attract each other 
A) The volume occupied the gas molecules is negligible compared to the volume of the container. 
B) The average kinetic energy of gas molecules is proportional to the Kelvin temperature 
C) The collision of one gas molecule with another (or with the walls)is completely elastic. 
D) Gas molecules attract each other

Question 10

A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm.What is the identity of the halogen?

Accepted Answer

A) Br2 
B) F2 
C) Cl2 
D) I2 
E) Ge 
A) Br2 
B) F2 
C) Cl2 
D) I2 
E) Ge

Question 11

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same V)?

Accepted Answer

A) 15 g F2 
B) 15 g Ne 
C) 15 g Kr 
D) 15 g CO2 
E) All of these samples will have the same pressure. 
A) 15 g F2 
B) 15 g Ne 
C) 15 g Kr 
D) 15 g CO2 
E) All of these samples will have the same pressure.

Question 12

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N2 at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

Accepted Answer

A) 0.59 atm 
B) 1.1 atm 
C) 1.7 atm 
D) 1.9 atm 
E) 3.8 atm 
A) 0.59 atm 
B) 1.1 atm 
C) 1.7 atm 
D) 1.9 atm 
E) 3.8 atm

Question 13

Which gas sample has the greatest volume at STP?

Accepted Answer

A) 4 g of H2  
B) 32 g of O2 
C) 18 g of Ar 
D) 4 g of He 
A) 4 g of H2  
B) 32 g of O2 
C) 18 g of Ar 
D) 4 g of He

Question 14

What is the mole fraction of CO in a container with a H2 mole fraction of 0.22 and an O2 mole fraction of 0.58?

Accepted Answer

A) 0.20 
B) 0.30 
C) 0.10 
D) 0.50 
A) 0.20 
B) 0.30 
C) 0.10 
D) 0.50

Question 15

Which of the following samples will have the greatest average speed at 355 K?

Accepted Answer

A) Ne 
B) C2H4 
C) Cl2 
D) CH4 
E) All of these samples will have the same average speed at the same temperature. 
A) Ne 
B) C2H4 
C) Cl2 
D) CH4 
E) All of these samples will have the same average speed at the same temperature.

Question 16

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below?
O3(g)+ 2 I-(aq)+ H2O(l)→ O2(g)+ I2(s)+ 2 OH-(aq)

Accepted Answer

A) 55.0 mL 
B) 110.mL 
C) 165 mL 
D) 220.mL 
A) 55.0 mL 
B) 110.mL 
C) 165 mL 
D) 220.mL

Question 17

A sample of air from a home is found to contain 6.2 ppm of carbon monoxide.This means that if the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

Accepted Answer

A) 4.3 × 103 
B) 4.3 × 10-3 
C) 4.3 
D) 8.9 × 103 
E) 1.1 × 108 
A) 4.3 × 103 
B) 4.3 × 10-3 
C) 4.3 
D) 8.9 × 103 
E) 1.1 × 108

In Boyle's Law,

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L)the gas will occupy when the temperature is increased to 121°C while maintaining the pressure at 629 torr.

Define diffusion.

Determine the mass of water formed when 12.5 L NH₃ (at 298 K and 1.50 atm)is reacted with 18.9 L of O₂ (at 323 K and 1.1 atm). 4 NH₃(g)+ 5 O₂(g)→ 4 NO(g)+ 6 H₂O(g)

Identify the molecule that effuses the fastest.

A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg.What volume of gas will the balloon contain at 1.35 atm and 253 K?

Which is not an assumption in the kinetic molecular theory for gases?

A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm.What is the identity of the halogen?

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same V)?

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N₂ at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

Which gas sample has the greatest volume at STP?

What is the mole fraction of CO in a container with a H₂ mole fraction of 0.22 and an O₂ mole fraction of 0.58?

Which of the following samples will have the greatest average speed at 355 K?

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below? O₃(g)+ 2 I^-(aq)+ H₂O(l)→ O₂(g)+ I₂(s)+ 2 OH^-(aq)

A sample of air from a home is found to contain 6.2 ppm of carbon monoxide.This means that if the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Exam 5: Gases

In Boyle's Law,

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn(s)+ H2SO4(aq)→ ZnSO4(aq)+ H2(g) In an experiment,225 mL of wet H2 is collected over water at 27°C and a barometric pressure of 748 torr.How many grams of Zn have been consumed? The vapor pressure of water at 27°C is 26.74 torr.

A fixed amount of gas at 25.0°C occupies a volume of 10.0 L when the pressure is 629 torr.Use Charles's law to calculate the volume (L)the gas will occupy when the temperature is increased to 121°C while maintaining the pressure at 629 torr.

Define diffusion.

Determine the mass of water formed when 12.5 L NH3 (at 298 K and 1.50 atm)is reacted with 18.9 L of O2 (at 323 K and 1.1 atm). 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(g)

Identify the molecule that effuses the fastest.

A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg.What volume of gas will the balloon contain at 1.35 atm and 253 K?

Which is not an assumption in the kinetic molecular theory for gases?

A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm.What is the identity of the halogen?

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same V)?

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N2 at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

Which gas sample has the greatest volume at STP?

What is the mole fraction of CO in a container with a H2 mole fraction of 0.22 and an O2 mole fraction of 0.58?

Which of the following samples will have the greatest average speed at 355 K?

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below? O3(g)+ 2 I-(aq)+ H2O(l)→ O2(g)+ I2(s)+ 2 OH-(aq)

A sample of air from a home is found to contain 6.2 ppm of carbon monoxide.This means that if the total pressure is 695 torr,then the partial pressure of CO is ________ torr.

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Determine the mass of water formed when 12.5 L NH₃ (at 298 K and 1.50 atm)is reacted with 18.9 L of O₂ (at 323 K and 1.1 atm). 4 NH₃(g)+ 5 O₂(g)→ 4 NO(g)+ 6 H₂O(g)

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure.A second syringe contains 473 mL of N₂ at 298 K and 2.6 atm.What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at STP?

What is the mole fraction of CO in a container with a H₂ mole fraction of 0.22 and an O₂ mole fraction of 0.58?

How many milliliters of ozone gas at at 25.0°C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.100 M aqueous solution of KI according to the chemical equation shown below? O₃(g)+ 2 I^-(aq)+ H₂O(l)→ O₂(g)+ I₂(s)+ 2 OH^-(aq)