Question 1

A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen?

Accepted Answer

A) 2.94 L 
B) 19.3 L 
C) 31.4 L 
D) 54.5 L 
E) 356 L 
A) 2.94 L 
B) 19.3 L 
C) 31.4 L 
D) 54.5 L 
E) 356 L

Question 2

Calculate the density, in g/L, of CO2 gas at 27°C and 0.50 atm pressure.

Accepted Answer

A) 0.89 g/L 
B) 1.12 g/L 
C) 9.93 g/L 
D) 46.0 g/L 
E) 2.17 kg/L 
A) 0.89 g/L 
B) 1.12 g/L 
C) 9.93 g/L 
D) 46.0 g/L 
E) 2.17 kg/L

Question 3

Two moles of chlorine gas at 20.0°C are heated to 350°C while the volume is kept constant. The density of the gas

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same. 
D) Not enough information is given to correctly answer the question. 
A) increases. 
B) decreases. 
C) remains the same. 
D) Not enough information is given to correctly answer the question.

Question 4

Packaged cake mixes usually contain baking powder, a mixture of sodium hydrogen carbonate and calcium hydrogen phosphate that react to produce carbon dioxide gas when they are heated in water. The CO2(g)formed allows the cake to "rise." When such cake mixes are used at high altitudes, often the cake will rise too much and collapse, unless special instructions are followed. Why does this happen?

Accepted Answer

Due to the reduced a

Question 5

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 1.0 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 6

What is P in the table below?

Accepted Answer

The answer of What is P in the table below?...

Question 7

What is the pressure (in atmospheres)of the sample of gas trapped in the closed-tube mercury manometer shown below if h = 23.6 cm?

Accepted Answer

The answer of What is the pressure (in atmospheres)of the...

Question 8

A 2.50-L flask contains a mixture of methane (CH4)and propane (C3H8)at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.)What is the mole fraction of methane in the original gas mixture?

Accepted Answer

A) 0.341 
B) 1.00 
C) 0.659 
D) 0.855 
E) 0.145 
A) 0.341 
B) 1.00 
C) 0.659 
D) 0.855 
E) 0.145

Question 9

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g)+ O2(g) $\rarr$2NO2(g)

Accepted Answer

A) 1.25 L 
B) 2.50 L 
C) 3.00 L 
D) 1.00 L 
E) 5.00 L 
A) 1.25 L 
B) 2.50 L 
C) 3.00 L 
D) 1.00 L 
E) 5.00 L

Question 10

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 742 mmHg and h = 16.7 cm?

Accepted Answer

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

Question 11

Which gas has molecules with the greatest average molecular speed at 25°C?

Accepted Answer

A) CH4 
B) Kr 
C) N2 
D) CO2 
E) Ar 
A) CH4 
B) Kr 
C) N2 
D) CO2 
E) Ar

Question 12

If equal masses of O2(g)and HBr(g)are in separate containers of equal volume and temperature, which one of these statements is true?

Accepted Answer

A) The pressure in the O2 container is greater than that in the HBr container. 
B) There are more HBr molecules than O2 molecules. 
C) The average velocity of the O2 molecules is less than that of the HBr molecules. 
D) The average kinetic energy of HBr molecules is greater than that of O2 molecules. 
E) The pressures of both gases are the same. 
A) The pressure in the O2 container is greater than that in the HBr container. 
B) There are more HBr molecules than O2 molecules. 
C) The average velocity of the O2 molecules is less than that of the HBr molecules. 
D) The average kinetic energy of HBr molecules is greater than that of O2 molecules. 
E) The pressures of both gases are the same.

Question 13

What is P in the table below?

Accepted Answer

The answer of What is P in the table below?...

Question 14

What volume of H2 is formed at STP when 6.0 g of Al is treated with excess NaOH?
2NaOH + 2Al + 6H2O $\rarr$ 2NaAl(OH)4 + 3H2(g)

Accepted Answer

The answer of What volume of H2 is formed at...

Question 15

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

Accepted Answer

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

Question 16

Determine the pressure of the gas trapped in the apparatus shown below when the atmospheric pressure is 695 mmHg.

Accepted Answer

A) 45 mmHg 
B) 650 mmHg 
C) 695 mmHg 
D) 740 mmHg 
E) 760 mmHg 
A) 45 mmHg 
B) 650 mmHg 
C) 695 mmHg 
D) 740 mmHg 
E) 760 mmHg

Question 17

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample? (R = 0.08206 L.atm/K.mol)

Accepted Answer

A) CH4 
B) C2H6 
C) C3H8 
D) C4H10 
E) C5H12 
A) CH4 
B) C2H6 
C) C3H8 
D) C4H10 
E) C5H12

Question 18

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

Accepted Answer

A) 12 
B) 4/3 
C) 3/4 
D) 1/3 
E) 4 
A) 12 
B) 4/3 
C) 3/4 
D) 1/3 
E) 4

Question 19

At what temperature will a fixed mass of gas with a volume of 125 L at 15°C and 750 mmHg occupy a volume of 101 L at a pressure of 645 mm Hg?

Accepted Answer

A) -73°C 
B) 10.4°C 
C) 2°C 
D) 34°C 
E) 200°C 
A) -73°C 
B) 10.4°C 
C) 2°C 
D) 34°C 
E) 200°C

Question 20

In an effort to address concerns about global warming, a power plant in Portland, Oregon is designed to take all of its exhaust gases from its boilers and recycle the CO2 using the Solvay process to make sodium hydrogen carbonate. The reaction is shown below.
NH3(g)+ H2O(l)+ CO2(g)+ NaCl(aq)$\rarr$NaHCO3(aq)+ NH4Cl(aq)
How many liters each of NH3 and CO2 (both at STP)would be consumed to produce 3.00 kg of sodium bicarbonate?

Accepted Answer

The volume of both N

A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen?

Calculate the density, in g/L, of CO₂ gas at 27°C and 0.50 atm pressure.

Two moles of chlorine gas at 20.0°C are heated to 350°C while the volume is kept constant. The density of the gas

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 1.0 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

What is P in the table below?

What is the pressure (in atmospheres)of the sample of gas trapped in the closed-tube mercury manometer shown below if h = 23.6 cm?

A 2.50-L flask contains a mixture of methane (CH₄)and propane (C₃H₈)at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.)What is the mole fraction of methane in the original gas mixture?

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g)+ O₂(g) $\rarr$ 2NO₂(g)

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 742 mmHg and h = 16.7 cm?

Which gas has molecules with the greatest average molecular speed at 25°C?

If equal masses of O₂(g)and HBr(g)are in separate containers of equal volume and temperature, which one of these statements is true?

What is P in the table below?

What volume of H₂ is formed at STP when 6.0 g of Al is treated with excess NaOH? 2NaOH + 2Al + 6H₂O $\rarr$ 2NaAl(OH)₄ + 3H₂(g)

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

Determine the pressure of the gas trapped in the apparatus shown below when the atmospheric pressure is 695 mmHg.

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample? (R = 0.08206 L.atm/K.mol)

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

At what temperature will a fixed mass of gas with a volume of 125 L at 15°C and 750 mmHg occupy a volume of 101 L at a pressure of 645 mm Hg?

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

Exam 5: Gases

A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen?

Calculate the density, in g/L, of CO2 gas at 27°C and 0.50 atm pressure.

Two moles of chlorine gas at 20.0°C are heated to 350°C while the volume is kept constant. The density of the gas

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 1.0 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

What is P in the table below?

What is the pressure (in atmospheres)of the sample of gas trapped in the closed-tube mercury manometer shown below if h = 23.6 cm?

A 2.50-L flask contains a mixture of methane (CH4)and propane (C3H8)at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.)What is the mole fraction of methane in the original gas mixture?

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g)+ O2(g) →\rarr→ 2NO2(g)

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 742 mmHg and h = 16.7 cm?

Which gas has molecules with the greatest average molecular speed at 25°C?

If equal masses of O2(g)and HBr(g)are in separate containers of equal volume and temperature, which one of these statements is true?

What is P in the table below?

What volume of H2 is formed at STP when 6.0 g of Al is treated with excess NaOH? 2NaOH + 2Al + 6H2O →\rarr→ 2NaAl(OH)4 + 3H2(g)

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

Determine the pressure of the gas trapped in the apparatus shown below when the atmospheric pressure is 695 mmHg.

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample? (R = 0.08206 L.atm/K.mol)

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

At what temperature will a fixed mass of gas with a volume of 125 L at 15°C and 750 mmHg occupy a volume of 101 L at a pressure of 645 mm Hg?

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

Calculate the density, in g/L, of CO₂ gas at 27°C and 0.50 atm pressure.

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 1.0 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

A 2.50-L flask contains a mixture of methane (CH₄)and propane (C₃H₈)at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.)What is the mole fraction of methane in the original gas mixture?

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g)+ O₂(g) $\rarr$ 2NO₂(g)

If equal masses of O₂(g)and HBr(g)are in separate containers of equal volume and temperature, which one of these statements is true?

What volume of H₂ is formed at STP when 6.0 g of Al is treated with excess NaOH? 2NaOH + 2Al + 6H₂O $\rarr$ 2NaAl(OH)₄ + 3H₂(g)

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