Question 1

Identify the element or molecule with the highest van der Waals constant.

Accepted Answer

A)  CCl4 
B)  Ar 
C)  O2 
D)  Cl2 
E)  Xe 
A)  CCl4 
B)  Ar 
C)  O2 
D)  Cl2 
E)  Xe

Question 2

While traveling,an airplane passenger placed a bag of potato chips in his checked luggage.When he opened the luggage,the bag had exploded and potato chips were everywhere in his luggage.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 3

The following reaction is used to generate hydrogen gas in the laboratory.If 243 mL of gas is collected at 25°C and has a total pressure of 745 mm Hg,what mass of hydrogen is produced? A possibly useful table of water vapor pressures is provided below. Mg(s)+ 2 HCl(aq)→ MgCl2(aq)+ H2(g)T (°C)P (mm Hg)
20 17.55
25 23.78
30 31.86

Accepted Answer

A)  0.0196 g H2 
B)  0.0717 g H2 
C)  0.0190 g H2 
D)  0.0144 g H2 
E)  0.0449 g H2 
A)  0.0196 g H2 
B)  0.0717 g H2 
C)  0.0190 g H2 
D)  0.0144 g H2 
E)  0.0449 g H2

Question 4

If a sample of 0.29 moles of Ar occupies 4.2 L under certain conditions,what volume will 0.66 moles occupy under the same conditions?

Accepted Answer

A)  1.8 L 
B)  9.6 L 
C)  8.0 L 
D)  5.0 L 
E)  15 L 
A)  1.8 L 
B)  9.6 L 
C)  8.0 L 
D)  5.0 L 
E)  15 L

Question 5

Using the graph below,determine the gas that has the highest 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 6

The density of a gas is 1.43 g/L at STP.What is the gas?

Accepted Answer

A)  H2 
B)  F2 
C)  Kr  
D)  O2 
E)  N2 
A)  H2 
B)  F2 
C)  Kr  
D)  O2 
E)  N2

Question 7

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 ________ mm Hg.

Accepted Answer

A)  9.33 
B)  483 
C)  0.635 
D)  1.57 
E)  23.14 
A)  9.33 
B)  483 
C)  0.635 
D)  1.57 
E)  23.14

Question 8

A balloon filled with helium gas at 20°C occupies 5.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196°C,while the pressure is raised to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

Accepted Answer

A)  0.30 L 
B)  4.3 L 
C)  8.1 L 
D)  120 L 
A)  0.30 L 
B)  4.3 L 
C)  8.1 L 
D)  120 L

Question 9

The total pressure of a gas mixture is the sum of the partial pressure of its components 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 10

A gas occupies 2.22 L at 3.67 atm.What is the volume at 1.94 atm?

Accepted Answer

A)  1.17 L 
B)  3.21 L 
C)  4.21 L 
D)  34.3 L 
E)  0.289 L 
A)  1.17 L 
B)  3.21 L 
C)  4.21 L 
D)  34.3 L 
E)  0.289 L

Question 11

Which of the gases in the graph below has the largest molar mass?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  There is not enough information to determine. 
A)  A 
B)  B 
C)  C 
D)  D 
E)  There is not enough information to determine.

Question 12

How many grams of XeF6 are required to react with 0.579 L of hydrogen gas at 4.46 atm and 45°C in the reaction shown below? XeF6(s)+ 3 H2(g)→ Xe(g)+ 6 HF(g)

Accepted Answer

A)  6.62 g 
B)  8.09 g 
C)  24.3 g 
D)  72.9 g 
A)  6.62 g 
B)  8.09 g 
C)  24.3 g 
D)  72.9 g

Question 13

If the pressure in a gas container that is connected to an open-end U-tube manometer is 126 kPa and the pressure of the atmosphere at the open end of the tube is 732 mm Hg,the level of mercury in the tube will

Accepted Answer

A)  be 213 mm higher in the arm open to the atmosphere. 
B)  be 213 mm higher in the arm connected to the gas cylinder. 
C)  be 945 mm higher in the arm open to the atmosphere. 
D)  be 925 mm higher in the arm connected to the gas cylinder. 
A)  be 213 mm higher in the arm open to the atmosphere. 
B)  be 213 mm higher in the arm connected to the gas cylinder. 
C)  be 945 mm higher in the arm open to the atmosphere. 
D)  be 925 mm higher in the arm connected to the gas cylinder.

Question 14

A mixture of F2,H2 and Xe have mole fractions of 0.25,0.65,and 0.10,respectively.What is the partial pressure of F2 if the total pressure of the mixture is 3.9 atm?

Accepted Answer

A)  2.5 atm 
B)  0.39 atm 
C)  0.67 atm 
D)  0.98 atm 
E)  1.75 atm 
A)  2.5 atm 
B)  0.39 atm 
C)  0.67 atm 
D)  0.98 atm 
E)  1.75 atm

Question 15

Match between columns
                        Premises: Charles's Law
manometer
Avogadro's Law
Boyle's Law
barometer
Dalton's Law
sphygmomanometer
Ideal Gas Law

Accepted Answer

The Answer of PV = nRT and PS1U1B1TS1U1B0 = PS1U1B1AS1U1B0 is...

Question 16

Convert 2.00 atm to mm Hg.

Accepted Answer

A)  760 mm Hg 
B)  800 mm Hg 
C)  1520 mm Hg 
D)  1050 mm Hg 
E)  1900 mm Hg 
A)  760 mm Hg 
B)  800 mm Hg 
C)  1520 mm Hg 
D)  1050 mm Hg 
E)  1900 mm Hg

Question 17

Why does HOT air rise?

Accepted Answer

As air is heated,it expands an

Question 18

What is the Celsius temperature of 100.0 g of chlorine gas in a 35.0-L container at 800 mm Hg?

Accepted Answer

A)  -114°C 
B)  46°C 
C)  159°C 
D)  318°C 
A)  -114°C 
B)  46°C 
C)  159°C 
D)  318°C

Question 19

A container filled with gas is connected to an open-end manometer that is filled with mineral oil.The pressure in the gas container is 763 mm Hg and atmospheric pressure is 734 mm Hg.How high will the level rise in the manometer if the densities of Hg and mineral oil are 13.6 g/mL and 0.822 g/mL respectively?

Accepted Answer

A)  1.75 mm 
B)  23.8 mm 
C)  29.0 mm 
D)  480 mm 
A)  1.75 mm 
B)  23.8 mm 
C)  29.0 mm 
D)  480 mm

Question 20

A gas mixture consists of N2,SO2,and Ar,where the mole fraction of N2 is 0.55 and the mole fraction of Ar is 0.25.If the mixture is at STP in a 5.0 L container,how many molecules of SO2 are present?

Accepted Answer

A)  4.5 × 1022 molecules SO2 
B)  2.7 × 1022 molecules SO2 
C)  3.7 × 1023 molecules SO2 
D)  1.1 × 1023 molecules SO2 
E)  9.3 × 1024 molecules SO2 
A)  4.5 × 1022 molecules SO2 
B)  2.7 × 1022 molecules SO2 
C)  3.7 × 1023 molecules SO2 
D)  1.1 × 1023 molecules SO2 
E)  9.3 × 1024 molecules SO2

Exam 5: Gases

Identify the element or molecule with the highest van der Waals constant.

While traveling,an airplane passenger placed a bag of potato chips in his checked luggage.When he opened the luggage,the bag had exploded and potato chips were everywhere in his luggage.Which gas law is this an example of?

If a sample of 0.29 moles of Ar occupies 4.2 L under certain conditions,what volume will 0.66 moles occupy under the same conditions?

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

The density of a gas is 1.43 g/L at STP.What is the gas?

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 ________ mm Hg.

A balloon filled with helium gas at 20°C occupies 5.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196°C,while the pressure is raised to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

The total pressure of a gas mixture is the sum of the partial pressure of its components is known as

A gas occupies 2.22 L at 3.67 atm.What is the volume at 1.94 atm?

Which of the gases in the graph below has the largest molar mass?

How many grams of XeF6 are required to react with 0.579 L of hydrogen gas at 4.46 atm and 45°C in the reaction shown below? XeF6(s)+ 3 H2(g)→ Xe(g)+ 6 HF(g)

If the pressure in a gas container that is connected to an open-end U-tube manometer is 126 kPa and the pressure of the atmosphere at the open end of the tube is 732 mm Hg,the level of mercury in the tube will

A mixture of F2,H2 and Xe have mole fractions of 0.25,0.65,and 0.10,respectively.What is the partial pressure of F2 if the total pressure of the mixture is 3.9 atm?

Convert 2.00 atm to mm Hg.

Why does HOT air rise?

What is the Celsius temperature of 100.0 g of chlorine gas in a 35.0-L container at 800 mm Hg?

A gas mixture consists of N2,SO2,and Ar,where the mole fraction of N2 is 0.55 and the mole fraction of Ar is 0.25.If the mixture is at STP in a 5.0 L container,how many molecules of SO2 are present?

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

How many grams of XeF₆ are required to react with 0.579 L of hydrogen gas at 4.46 atm and 45°C in the reaction shown below? XeF₆(s)+ 3 H₂(g)→ Xe(g)+ 6 HF(g)

A mixture of F₂,H₂ and Xe have mole fractions of 0.25,0.65,and 0.10,respectively.What is the partial pressure of F₂ if the total pressure of the mixture is 3.9 atm?

A gas mixture consists of N₂,SO₂,and Ar,where the mole fraction of N₂ is 0.55 and the mole fraction of Ar is 0.25.If the mixture is at STP in a 5.0 L container,how many molecules of SO₂ are present?