Question 1

Define pressure.

Accepted Answer

Pressure is the force exerted

Question 2

Which of the following samples has the greatest density at STP?

Accepted Answer

A)  O2 
B)  Xe 
C)  CO2 
D)  SF6 
E)  All of these samples have the same density at STP. 
A)  O2 
B)  Xe 
C)  CO2 
D)  SF6 
E)  All of these samples have the same density at STP.

Question 3

What volume will a balloon occupy at 1.0 atm,if the balloon has a volume of 4.4 L at 2.2 atm?

Accepted Answer

A)  3.0 L 
B)  1.50 L 
C)  9.7 L 
D)  6.6 L 
E)  2.2 L 
A)  3.0 L 
B)  1.50 L 
C)  9.7 L 
D)  6.6 L 
E)  2.2 L

Question 4

Using the graph below,determine the gas that has the lowest density at STP.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  All of the gases have the same density at STP. 
A)  A 
B)  B 
C)  C 
D)  D 
E)  All of the gases have the same density at STP.

Question 5

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 130.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H2O(l)→ 2 H2(g)+ O2(g)

Accepted Answer

A)  88.3 L 
B)  176 L 
C)  265 L 
D)  529 L 
A)  88.3 L 
B)  176 L 
C)  265 L 
D)  529 L

Question 6

In Lhasa,Tibet,the elevation is 12,000 feet.The altimeter reading in an airplane is 19.00 in Hg.This pressure is equal to ________ atm.

Accepted Answer

A)  9.33 
B)  483 
C)  0.635 
D)  1.57 
E)  23.1 
A)  9.33 
B)  483 
C)  0.635 
D)  1.57 
E)  23.1

Question 7

A balloon contains 0.76 mol O2,0.18 mol Ne,0.031 mol Xe and 0.026 mol CO2 at 749 mm Hg.What is the partial pressure of Ne?

Accepted Answer

A)  20 mm Hg 
B)  23 mm Hg 
C)  140 mm Hg 
D)  570 mm Hg 
A)  20 mm Hg 
B)  23 mm Hg 
C)  140 mm Hg 
D)  570 mm Hg

Question 8

Convert 2.00 atm to psi.

Accepted Answer

A)  59.8 psi 
B)  875 psi 
C)  29.4 psi 
D)  42.0 psi 
E)  1520 psi 
A)  59.8 psi 
B)  875 psi 
C)  29.4 psi 
D)  42.0 psi 
E)  1520 psi

Question 9

Near Cozumel,Mexico,a scuba diver goes down 60 ft to look at the sea creatures.As she descends,the air pressure increases.Which gas law is this an example of?

Accepted Answer

A)  Avogadro's Law 
B)  Ideal Gas Law 
C)  Charles's Law 
D)  Boyle's Law 
E)  Dalton's Law 
A)  Avogadro's Law 
B)  Ideal Gas Law 
C)  Charles's Law 
D)  Boyle's Law 
E)  Dalton's Law

Question 10

The volume of a gas is proportional to number of moles of a gas is known as

Accepted Answer

A)  Avogadro's Law. 
B)  Ideal Gas Law. 
C)  Charles's Law. 
D)  Boyle's Law. 
E)  Dalton's Law. 
A)  Avogadro's Law. 
B)  Ideal Gas Law. 
C)  Charles's Law. 
D)  Boyle's Law. 
E)  Dalton's Law.

Question 11

What volume (in mL)will a sample of F2 gas occupy in a syringe at 5.5 atm,if the F2 has a volume of 30.0 mL at 1.2 atm?

Accepted Answer

A)  138 mL 
B)  30 mL 
C)  4.0 mL 
D)  6.5 mL 
E)  1.2 mL 
A)  138 mL 
B)  30 mL 
C)  4.0 mL 
D)  6.5 mL 
E)  1.2 mL

Question 12

How many molecules of N2 are in a 200.0 mL container at 780 mm Hg and 135°C?

Accepted Answer

A)  3.50 × 1021 molecules 
B)  3.69 × 1021 molecules 
C)  1.06 × 1022 molecules 
D)  1.12 × 1022 molecules 
E)  3.30 × 1021 molecules 
A)  3.50 × 1021 molecules 
B)  3.69 × 1021 molecules 
C)  1.06 × 1022 molecules 
D)  1.12 × 1022 molecules 
E)  3.30 × 1021 molecules

Question 13

The rate of effusion of oxygen to an unknown gas is 1.49.What is the other gas?

Accepted Answer

A)  Ar 
B)  HBr 
C)  SO2 
D)  Cl2 
E)  He 
A)  Ar 
B)  HBr 
C)  SO2 
D)  Cl2 
E)  He

Question 14

Which of the following gases has the lowest average speed at 25°C?

Accepted Answer

A)  He    
B)  H2Se 
C)  PH3   
D)  F2 
A)  He    
B)  H2Se 
C)  PH3   
D)  F2

Question 15

How many liters of oxygen gas can be produced at STP from the decomposition of 0.0625 L of 3.00 M H2O2 in the reaction according to the chemical equation shown below? 2 H2O2(l)→ 2 H2O(l)+ O2(g)

Accepted Answer

A)  2.10 L 
B)  2.80 L 
C)  4.20 L 
D)  8.40 L 
A)  2.10 L 
B)  2.80 L 
C)  4.20 L 
D)  8.40 L

Question 16

The atmospheric pressure is 715 mm Hg.What is the pressure in torr?

Accepted Answer

A)  715 torr 
B)  28.1 torr 
C)  13.5 torr 
D)  29.5 torr 
E)  760 torr 
A)  715 torr 
B)  28.1 torr 
C)  13.5 torr 
D)  29.5 torr 
E)  760 torr

Question 17

A 55.0-L steel tank at 20.0°C contains acetylene gas,C2H2,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

Accepted Answer

A)  3.17 g 
B)  8.20 g 
C)  82.8 g 
D)  1210 g 
A)  3.17 g 
B)  8.20 g 
C)  82.8 g 
D)  1210 g

Question 18

The volume of 350.mL of gas at 25°C is decreased to 125 mL at constant pressure.What is the final temperature of the gas?

Accepted Answer

A)  -167°C 
B)  8.9°C 
C)  70°C 
D)  561°C 
A)  -167°C 
B)  8.9°C 
C)  70°C 
D)  561°C

Question 19

Given the equation C2H6(g)+ O2(g)→ CO2(g)+ H2O(g)(not balanced),determine the number of liters of CO2 formed at STP when 120.0 grams of C2H6 is burned in excess oxygen gas.

Accepted Answer

Question 20

Identify the element or molecule that has the lowest diffusion rate.

Accepted Answer

A)  Ne  
B)  CO  
C)  HCl  
D)  SO2 
E)  Xe 
A)  Ne  
B)  CO  
C)  HCl  
D)  SO2 
E)  Xe

Exam 5: Gases

Define pressure.

Which of the following samples has the greatest density at STP?

What volume will a balloon occupy at 1.0 atm,if the balloon has a volume of 4.4 L at 2.2 atm?

Using the graph below,determine the gas that has the lowest density at STP.

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 130.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H2O(l)→ 2 H2(g)+ O2(g)

In Lhasa,Tibet,the elevation is 12,000 feet.The altimeter reading in an airplane is 19.00 in Hg.This pressure is equal to ________ atm.

A balloon contains 0.76 mol O2,0.18 mol Ne,0.031 mol Xe and 0.026 mol CO2 at 749 mm Hg.What is the partial pressure of Ne?

Convert 2.00 atm to psi.

Near Cozumel,Mexico,a scuba diver goes down 60 ft to look at the sea creatures.As she descends,the air pressure increases.Which gas law is this an example of?

The volume of a gas is proportional to number of moles of a gas is known as

What volume (in mL)will a sample of F2 gas occupy in a syringe at 5.5 atm,if the F2 has a volume of 30.0 mL at 1.2 atm?

How many molecules of N2 are in a 200.0 mL container at 780 mm Hg and 135°C?

The rate of effusion of oxygen to an unknown gas is 1.49.What is the other gas?

Which of the following gases has the lowest average speed at 25°C?

How many liters of oxygen gas can be produced at STP from the decomposition of 0.0625 L of 3.00 M H2O2 in the reaction according to the chemical equation shown below? 2 H2O2(l)→ 2 H2O(l)+ O2(g)

The atmospheric pressure is 715 mm Hg.What is the pressure in torr?

A 55.0-L steel tank at 20.0°C contains acetylene gas,C2H2,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

The volume of 350.mL of gas at 25°C is decreased to 125 mL at constant pressure.What is the final temperature of the gas?

Given the equation C2H6(g)+ O2(g)→ CO2(g)+ H2O(g)(not balanced),determine the number of liters of CO2 formed at STP when 120.0 grams of C2H6 is burned in excess oxygen gas.

Identify the element or molecule that has the lowest diffusion rate.

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,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What is the total volume of the mixture of hydrogen gas and oxygen gas can be obtained from the electrolysis of 130.0 grams of water at 25.0°C and 1.00 atm pressure according to the chemical equation shown below? 2 H₂O(l)→ 2 H₂(g)+ O₂(g)

A balloon contains 0.76 mol O₂,0.18 mol Ne,0.031 mol Xe and 0.026 mol CO₂ at 749 mm Hg.What is the partial pressure of Ne?

What volume (in mL)will a sample of F₂ gas occupy in a syringe at 5.5 atm,if the F₂ has a volume of 30.0 mL at 1.2 atm?

How many molecules of N₂ are in a 200.0 mL container at 780 mm Hg and 135°C?

How many liters of oxygen gas can be produced at STP from the decomposition of 0.0625 L of 3.00 M H₂O₂ in the reaction according to the chemical equation shown below? 2 H₂O₂(l)→ 2 H₂O(l)+ O₂(g)

A 55.0-L steel tank at 20.0°C contains acetylene gas,C₂H₂,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

Given the equation C₂H₆(g)+ O₂(g)→ CO₂(g)+ H₂O(g)(not balanced),determine the number of liters of CO₂ formed at STP when 120.0 grams of C₂H₆ is burned in excess oxygen gas.