Question 1

Chlorofluorocarbons are not used in _____.

Accepted Answer

A)  aerosol propellants 
B)  refrigeration systems 
C)  industrial solvents 
D)  fast-food containers 
E)  steel utensils 
A)  aerosol propellants 
B)  refrigeration systems 
C)  industrial solvents 
D)  fast-food containers 
E)  steel utensils

Question 2

Nitrogen fixation converts nitrogen to _____.

Accepted Answer

A)  cellulose 
B)  nitrates 
C)  nitrogen oxides 
D)  nitric acid 
E)  glucose 
A)  cellulose 
B)  nitrates 
C)  nitrogen oxides 
D)  nitric acid 
E)  glucose

Question 3

A balloon contains 14.0 L of air at a pressure of 760 torr. What will be the volume of the air when the balloon is taken to a region with a pressure of 981 torr at constant temperature ?

Accepted Answer

A)  1.3 L 
B)  8.2 L 
C)  10.8 L 
D)  14.0 L 
E)  18 L 
A)  1.3 L 
B)  8.2 L 
C)  10.8 L 
D)  14.0 L 
E)  18 L

Question 4

The noble gas argon accounts for approximately _____ of the earth's atmosphere.

Accepted Answer

A)  10% 
B)  0.9% 
C)  0.1% 
D)  0.01% 
E)  0.001% 
A)  10% 
B)  0.9% 
C)  0.1% 
D)  0.01% 
E)  0.001%

Question 5

Which of these gases is/ are considered inert and unreactive?
I. Ne
II. O2
III. Ar
IV. CO2

Accepted Answer

A)  I only 
B)  II only 
C)  II and III 
D)  I and III 
E)  I, III, and IV 
A)  I only 
B)  II only 
C)  II and III 
D)  I and III 
E)  I, III, and IV

Question 6

A sample of carbon dioxide at 10.0 ° C has a volume of 300.0 mL at 760 torr. What is the volume of the gas at 30.0 ° C and 760 torr?

Accepted Answer

A)  275 mL 
B)  280.5 mL 
C)  321.2 mL 
D)  755 mL 
E)  900 mL 
A)  275 mL 
B)  280.5 mL 
C)  321.2 mL 
D)  755 mL 
E)  900 mL

Question 7

Which of these gases is the most abundant in the earth's atmosphere?

Accepted Answer

A)  O2 
B)  N2 
C)  H2 
D)  He 
E)  CO2 
A)  O2 
B)  N2 
C)  H2 
D)  He 
E)  CO2

Question 8

Which of these substances is /are  not important in the life cycle of plants?
I. N2
II. He
III. H2O
IV. CO2

Accepted Answer

A)  I only 
B)  II only 
C)  II and III 
D)  I and II 
E)  I, III, and IV 
A)  I only 
B)  II only 
C)  II and III 
D)  I and II 
E)  I, III, and IV

Question 9

18 ppm equals _____.

Accepted Answer

A)  0.18% 
B)  0.018% 
C)  0.0018% 
D)  0.00018% 
E)  0.000018% 
A)  0.18% 
B)  0.018% 
C)  0.0018% 
D)  0.00018% 
E)  0.000018%

Question 10

The temperature scale used in problems involving gas law equation  must be expressed in _____.

Accepted Answer

A)  celsius 
B)  kelvin 
C)  fahrenheit 
D)  rankine 
E)  newton 
A)  celsius 
B)  kelvin 
C)  fahrenheit 
D)  rankine 
E)  newton

Question 11

Which of these is not a possible unit of pressure?

Accepted Answer

A)  in. Hg 
B)  psi 
C)  torr 
D)  mm Hg 
E)  lb/s 
A)  in. Hg 
B)  psi 
C)  torr 
D)  mm Hg 
E)  lb/s

Question 12

Which of the following is not a risk factor associated with excessive exposure to UV-B rays?

Accepted Answer

A)  Skin cancer 
B)  Premature aging 
C)  Cataracts 
D)  Depressed immune system 
E)  Tubercolosis 
A)  Skin cancer 
B)  Premature aging 
C)  Cataracts 
D)  Depressed immune system 
E)  Tubercolosis

Question 13

Which of these processes is represented by the given equation?
​
6 H2O + 6 CO2 + energy → C6H12O6 + 6 O2

Accepted Answer

A)  Nitrogen fixation 
B)  Combustion 
C)  Photosynthesis 
D)  Respiration 
E)  Ozone depletion 
A)  Nitrogen fixation 
B)  Combustion 
C)  Photosynthesis 
D)  Respiration 
E)  Ozone depletion

Question 14

The volume of 350.0 mL of gas at 25.0 ° C is decreased to 125 mL at constant pressure. What is the final temperature of the gas?

Accepted Answer

A)  − 167 ° C 
B)  − 126 ° C 
C)  70 ° C 
D)  8.9 ° C 
E)  147 ° C 
A)  − 167 ° C 
B)  − 126 ° C 
C)  70 ° C 
D)  8.9 ° C 
E)  147 ° C

Question 15

A sample of  the gas  Freon in an air conditioner has a volume of 325 L and a pressure of 96,300 Pa at 20 ° C. What will be the pressure of Freon when the volume is 975 L at 20 ° C?

Accepted Answer

A)  1975 Pa 
B)  3.2 × 104 Pa 
C)  2.89 × 105 Pa 
D)  3.1 × 107 Pa 
E)  9.4 × 107 Pa 
A)  1975 Pa 
B)  3.2 × 104 Pa 
C)  2.89 × 105 Pa 
D)  3.1 × 107 Pa 
E)  9.4 × 107 Pa

Question 16

Which of these is the correct representation of Boyle's law?

Accepted Answer

A)  PV = k 
B)  V/T = k 
C)  P/V = k 
D)  V/P = k 
E)  VT = k 
A)  PV = k 
B)  V/T = k 
C)  P/V = k 
D)  V/P = k 
E)  VT = k

Question 17

Which of these pollutants gives smog its characteristic brown color?

Accepted Answer

A)  CO 
B)  NO2 
C)  SO2 
D)  O3 
E)  Pb 
A)  CO 
B)  NO2 
C)  SO2 
D)  O3 
E)  Pb

Question 18

What is the approximate composition of the earth's atmosphere?

Accepted Answer

A)  80% oxygen and 20% nitrogen 
B)  78% nitrogen and 21% oxygen 
C)  50% nitrogen and 50% oxygen 
D)  100% oxygen 
E)  100% nitrogen 
A)  80% oxygen and 20% nitrogen 
B)  78% nitrogen and 21% oxygen 
C)  50% nitrogen and 50% oxygen 
D)  100% oxygen 
E)  100% nitrogen

Question 19

Which of these is not a possible unit of pressure?

Accepted Answer

A)  mm Hg 
B)  psi 
C)  torr 
D)  atm 
E)  J/s 
A)  mm Hg 
B)  psi 
C)  torr 
D)  atm 
E)  J/s

Question 20

Which region of the atmosphere is credited with the phenomenon known as aurora borealis or the northern lights?

Accepted Answer

A)  Thermosphere 
B)  Mesosphere 
C)  Stratosphere 
D)  Troposphere 
E)  Ionosphere 
A)  Thermosphere 
B)  Mesosphere 
C)  Stratosphere 
D)  Troposphere 
E)  Ionosphere

Chlorofluorocarbons are not used in _____.

Nitrogen fixation converts nitrogen to _____.

A balloon contains 14.0 L of air at a pressure of 760 torr. What will be the volume of the air when the balloon is taken to a region with a pressure of 981 torr at constant temperature ?

The noble gas argon accounts for approximately _____ of the earth's atmosphere.

Which of these gases is/ are considered inert and unreactive? I. Ne II. O₂ III. Ar IV. CO₂

A sample of carbon dioxide at 10.0 ° C has a volume of 300.0 mL at 760 torr. What is the volume of the gas at 30.0 ° C and 760 torr?

Which of these gases is the most abundant in the earth's atmosphere?

Which of these substances is /are not important in the life cycle of plants? I. N₂ II. He III. H₂O IV. CO₂

18 ppm equals _____.

The temperature scale used in problems involving gas law equation must be expressed in _____.

Which of these is not a possible unit of pressure?

Which of the following is not a risk factor associated with excessive exposure to UV-B rays?

Which of these processes is represented by the given equation? 6 H₂O + 6 CO₂ + energy → C₆H₁₂O₆ + 6 O₂

The volume of 350.0 mL of gas at 25.0 ° C is decreased to 125 mL at constant pressure. What is the final temperature of the gas?

A sample of the gas Freon in an air conditioner has a volume of 325 L and a pressure of 96,300 Pa at 20 ° C. What will be the pressure of Freon when the volume is 975 L at 20 ° C?

Which of these is the correct representation of Boyle's law?

Which of these pollutants gives smog its characteristic brown color?

What is the approximate composition of the earth's atmosphere?

Which of these is not a possible unit of pressure?

Which region of the atmosphere is credited with the phenomenon known as aurora borealis or the northern lights?

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Exam 11: The Air Around Us

Chlorofluorocarbons are not used in _____.

Nitrogen fixation converts nitrogen to _____.

A balloon contains 14.0 L of air at a pressure of 760 torr. What will be the volume of the air when the balloon is taken to a region with a pressure of 981 torr at constant temperature ?

The noble gas argon accounts for approximately _____ of the earth's atmosphere.

Which of these gases is/ are considered inert and unreactive? I. Ne II. O2 III. Ar IV. CO2

A sample of carbon dioxide at 10.0 ° C has a volume of 300.0 mL at 760 torr. What is the volume of the gas at 30.0 ° C and 760 torr?

Which of these gases is the most abundant in the earth's atmosphere?

Which of these substances is /are not important in the life cycle of plants? I. N2 II. He III. H2O IV. CO2

18 ppm equals _____.

The temperature scale used in problems involving gas law equation must be expressed in _____.

Which of these is not a possible unit of pressure?

Which of the following is not a risk factor associated with excessive exposure to UV-B rays?

Which of these processes is represented by the given equation? ​ 6 H2O + 6 CO2 + energy → C6H12O6 + 6 O2

The volume of 350.0 mL of gas at 25.0 ° C is decreased to 125 mL at constant pressure. What is the final temperature of the gas?

A sample of the gas Freon in an air conditioner has a volume of 325 L and a pressure of 96,300 Pa at 20 ° C. What will be the pressure of Freon when the volume is 975 L at 20 ° C?

Which of these is the correct representation of Boyle's law?

Which of these pollutants gives smog its characteristic brown color?

What is the approximate composition of the earth's atmosphere?

Which of these is not a possible unit of pressure?

Which region of the atmosphere is credited with the phenomenon known as aurora borealis or the northern lights?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology Online Only

Filters

Which of these gases is/ are considered inert and unreactive? I. Ne II. O₂ III. Ar IV. CO₂

Which of these substances is /are not important in the life cycle of plants? I. N₂ II. He III. H₂O IV. CO₂

Which of these processes is represented by the given equation? 6 H₂O + 6 CO₂ + energy → C₆H₁₂O₆ + 6 O₂