Question 1

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.

Question 2

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

Question 3

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

Question 4

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.

Question 5

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.

Question 6

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

Question 7

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 8

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

Question 9

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

Question 10

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

Question 11

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

Accepted Answer

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

Question 12

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

Question 13

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

Question 14

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

Accepted Answer

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

Question 15

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

Question 16

Define pressure.

Accepted Answer

Pressure is the force exerted ...

Question 17

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

Question 18

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

Question 19

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

Question 20

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

Exam 5: Gases

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)

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

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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)

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

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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?

Correct AnswerverifiedShow Answer

Convert 2.00 atm to psi.

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

Correct AnswerverifiedShow Answer

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?

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

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

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

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

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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.

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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?

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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.

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

Correct AnswerverifiedShow Answer

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?

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

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Define pressure.

Correct AnswerverifiedPressure is the force exerted ...View AnswerShow Answer

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)

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Correct Answer
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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)

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

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Correct Answer
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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?

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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.

Correct Answer
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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?

Correct Answer
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Correct Answer
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Correct Answer
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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?

Correct Answer
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Correct Answer
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Correct Answer
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Pressure is the force exerted ...
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