Question 1

The EPA limit for CO is 9 ppm.Express this number as a percentage.

Accepted Answer

A) 90% 
B) 9% 
C) 0.09% 
D) 0.0009% 
A) 90% 
B) 9% 
C) 0.09% 
D) 0.0009% D

Question 2

Which is the balanced chemical equation showing hydrogen peroxide (H2O2)decomposing into hydrogen (H2)and oxygen (O2)?

Accepted Answer

A) H2O2 → H2 + O2 
B) H2 + O2 → H2O2 
C) 2 H2 + O2 → 2 H2O2 
D) 2 H2O2 → 2 H2 + O2 
A) H2O2 → H2 + O2 
B) H2 + O2 → H2O2 
C) 2 H2 + O2 → 2 H2O2 
D) 2 H2O2 → 2 H2 + O2 A

Question 3

Choose the proper coefficients for each substance to yield a balanced equation.

Accepted Answer

A) 1,1,1 
B) 2,1,1 
C) 2,1,2 
D) 2,1,1. 
A) 1,1,1 
B) 2,1,1 
C) 2,1,2 
D) 2,1,1. C

Question 4

Which pollutant is present in air as particulate matter?

Accepted Answer

A) soot 
B) ozone 
C) sulfur dioxide 
D) carbon monoxide 
A) soot 
B) ozone 
C) sulfur dioxide 
D) carbon monoxide

Question 5

The most numerous of the elements are the

Accepted Answer

A) metals. 
B) non metals. 
C) metalloids. 
D) noble gases. 
A) metals. 
B) non metals. 
C) metalloids. 
D) noble gases.

Question 6

Which diagram(s)best represent(s)only diatomic molecules?

Accepted Answer

A) I only 
B) II only 
C) I and II only 
D) II and IV only 
A) I only 
B) II only 
C) I and II only 
D) II and IV only

Question 7

When assessing the risk of an air pollutant,which does not play a role in considering someone's exposure to the pollutant?

Accepted Answer

A) a person's lung capacity 
B) a person's breathing rate 
C) the toxicity of the pollutant 
D) the concentration in air of the pollutant 
A) a person's lung capacity 
B) a person's breathing rate 
C) the toxicity of the pollutant 
D) the concentration in air of the pollutant

Question 8

Ozone is considered an air pollutant in the ________ but is a valuable protective layer in the __________.

Accepted Answer

A) troposphere;stratosphere 
B) stratosphere;mesosphere 
C) stratosphere;troposphere 
D) mesosphere;stratosphere 
A) troposphere;stratosphere 
B) stratosphere;mesosphere 
C) stratosphere;troposphere 
D) mesosphere;stratosphere

Question 9

Ozone is a secondary pollutant.A secondary pollutant is

Accepted Answer

A) not as hazardous as a primary pollutant. 
B) not produced directly but as the product of the interaction of two or more pollutants. 
C) one that is naturally present in our atmosphere. 
D) one that is less hazardous than a primary pollutant. 
A) not as hazardous as a primary pollutant. 
B) not produced directly but as the product of the interaction of two or more pollutants. 
C) one that is naturally present in our atmosphere. 
D) one that is less hazardous than a primary pollutant.

Question 10

Balance this equation P4 + Cl2 → PCl5 with the smallest whole number coefficients.Choose the answer that is the sum of the coefficients.Do not forget coefficients of "one".

Accepted Answer

A) 7 
B) 9 
C) 11 
D) 13 
E) 15 
A) 7 
B) 9 
C) 11 
D) 13 
E) 15

Question 11

Which correctly pairs an indoor pollutant with its source?

Accepted Answer

A) formaldehyde and unvented space heaters 
B) O3 and electrical arcing 
C) radon and glues and solvents 
D) nicotine and paint and paint thinners 
A) formaldehyde and unvented space heaters 
B) O3 and electrical arcing 
C) radon and glues and solvents 
D) nicotine and paint and paint thinners

Question 12

Of five major gaseous components of air,which is the only one to vary significantly in concentration from place to place and from day to day?

Accepted Answer

A) water vapor 
B) carbon dioxide 
C) nitrogen 
D) argon 
A) water vapor 
B) carbon dioxide 
C) nitrogen 
D) argon

Question 13

The name of the compound formed by combining carbon atoms  
With oxygen atoms   To form   Is

Accepted Answer

A) carbon oxide. 
B) monocarbon dioxide. 
C) carbon dioxide. 
D) carbonate. 
A) carbon oxide. 
B) monocarbon dioxide. 
C) carbon dioxide. 
D) carbonate.

Question 14

Which substance is an element?

Accepted Answer

A) NO2 
B) NaCl 
C) N2 
D) CH4 
A) NO2 
B) NaCl 
C) N2 
D) CH4

Question 15

Would a woman that inhaled 15,000 liters of air per day exceed the 24-hr average for inhalation of SO2 if she were exposed to 1150 μg of SO2 each day?

Accepted Answer

NO
Explanation: Consult Table

Question 16

The quantity 8.7 × 105 g expressed in standard decimal notation is:

Accepted Answer

A) 0.000087 g 
B) 870.000 g 
C) 0.0000087 g 
D) 870,000 g 
A) 0.000087 g 
B) 870.000 g 
C) 0.0000087 g 
D) 870,000 g

Question 17

Catalytic converters reduce the amount of ________ in car exhaust.

Accepted Answer

A) O3 
B) CO2 
C) CO 
D) N2 
A) O3 
B) CO2 
C) CO 
D) N2

Question 18

Which of the following are examples of technological advances that have reduced air pollution?
__	Paint with reduced VOCs 
__	Catalytic converters 
__	Burning gasoline in leaf blowers 
__	Low sulfur Diesel fuels

Accepted Answer

X	Paint with reduced VOCs 
X	C

Question 19

Which pollutant are you more likely to encounter in dangerous concentrations indoors rather than outdoors?

Accepted Answer

A) nitrogen dioxide 
B) carbon monoxide 
C) ozone 
D) sulfur dioxide 
A) nitrogen dioxide 
B) carbon monoxide 
C) ozone 
D) sulfur dioxide

Question 20

There are approximately 2 × 1022 molecules and atoms in each breath we take and the concentration of CO in the air is approximately 9 parts per million.Approximately how many CO molecules are in each breath we take?

Accepted Answer

A) 2 × 1015 
B) 1.8 × 1017 
C) 2 × 1017 
D) 2 × 1029 
A) 2 × 1015 
B) 1.8 × 1017 
C) 2 × 1017 
D) 2 × 1029

The EPA limit for CO is 9 ppm.Express this number as a percentage.

Which is the balanced chemical equation showing hydrogen peroxide (H₂O₂)decomposing into hydrogen (H₂)and oxygen (O₂)?

Choose the proper coefficients for each substance to yield a balanced equation.

Which pollutant is present in air as particulate matter?

The most numerous of the elements are the

Which diagram(s)best represent(s)only diatomic molecules?

When assessing the risk of an air pollutant,which does not play a role in considering someone's exposure to the pollutant?

Ozone is considered an air pollutant in the but is a valuable protective layer in the __.

Ozone is a secondary pollutant.A secondary pollutant is

Balance this equation P₄ + Cl₂ → PCl₅ with the smallest whole number coefficients.Choose the answer that is the sum of the coefficients.Do not forget coefficients of "one".

Which correctly pairs an indoor pollutant with its source?

Of five major gaseous components of air,which is the only one to vary significantly in concentration from place to place and from day to day?

The name of the compound formed by combining carbon atoms With oxygen atoms To form Is

Which substance is an element?

Would a woman that inhaled 15,000 liters of air per day exceed the 24-hr average for inhalation of SO₂ if she were exposed to 1150 μg of SO₂ each day?

The quantity 8.7 × 10⁵ g expressed in standard decimal notation is:

Catalytic converters reduce the amount of ________ in car exhaust.

Which of the following are examples of technological advances that have reduced air pollution? Paint with reduced VOCs Catalytic converters Burning gasoline in leaf blowers Low sulfur Diesel fuels

Which pollutant are you more likely to encounter in dangerous concentrations indoors rather than outdoors?

There are approximately 2 × 10²² molecules and atoms in each breath we take and the concentration of CO in the air is approximately 9 parts per million.Approximately how many CO molecules are in each breath we take?

Protecting the Ozone Layer

The Chemistry of Global Climate Change

Energy From Combustion

Water for Life

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

Exam 1: The Air We Breathe

The EPA limit for CO is 9 ppm.Express this number as a percentage.

Which is the balanced chemical equation showing hydrogen peroxide (H2O2)decomposing into hydrogen (H2)and oxygen (O2)?

Choose the proper coefficients for each substance to yield a balanced equation.

Which pollutant is present in air as particulate matter?

The most numerous of the elements are the

Which diagram(s)best represent(s)only diatomic molecules?

When assessing the risk of an air pollutant,which does not play a role in considering someone's exposure to the pollutant?

Ozone is considered an air pollutant in the ________ but is a valuable protective layer in the __________.

Ozone is a secondary pollutant.A secondary pollutant is

Balance this equation P4 + Cl2 → PCl5 with the smallest whole number coefficients.Choose the answer that is the sum of the coefficients.Do not forget coefficients of "one".

Which correctly pairs an indoor pollutant with its source?

Of five major gaseous components of air,which is the only one to vary significantly in concentration from place to place and from day to day?

The name of the compound formed by combining carbon atoms With oxygen atoms To form Is

Which substance is an element?

Would a woman that inhaled 15,000 liters of air per day exceed the 24-hr average for inhalation of SO2 if she were exposed to 1150 μg of SO2 each day?

The quantity 8.7 × 105 g expressed in standard decimal notation is:

Catalytic converters reduce the amount of ________ in car exhaust.

Which of the following are examples of technological advances that have reduced air pollution? __ Paint with reduced VOCs __ Catalytic converters __ Burning gasoline in leaf blowers __ Low sulfur Diesel fuels

Which pollutant are you more likely to encounter in dangerous concentrations indoors rather than outdoors?

There are approximately 2 × 1022 molecules and atoms in each breath we take and the concentration of CO in the air is approximately 9 parts per million.Approximately how many CO molecules are in each breath we take?

Protecting the Ozone Layer

The Chemistry of Global Climate Change

Energy From Combustion

Water for Life

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

Which is the balanced chemical equation showing hydrogen peroxide (H₂O₂)decomposing into hydrogen (H₂)and oxygen (O₂)?

Ozone is considered an air pollutant in the but is a valuable protective layer in the __.

Balance this equation P₄ + Cl₂ → PCl₅ with the smallest whole number coefficients.Choose the answer that is the sum of the coefficients.Do not forget coefficients of "one".

Would a woman that inhaled 15,000 liters of air per day exceed the 24-hr average for inhalation of SO₂ if she were exposed to 1150 μg of SO₂ each day?

The quantity 8.7 × 10⁵ g expressed in standard decimal notation is:

Which of the following are examples of technological advances that have reduced air pollution? Paint with reduced VOCs Catalytic converters Burning gasoline in leaf blowers Low sulfur Diesel fuels

There are approximately 2 × 10²² molecules and atoms in each breath we take and the concentration of CO in the air is approximately 9 parts per million.Approximately how many CO molecules are in each breath we take?