Question 1

Which is the correct balanced equation for the complete combustion of ethane in excess oxygen?

Accepted Answer

A)  CH4 + 2 O2 → CO2 + 2 H2O
B)  2 CH4 + 3 O2 → 2 CO + 4 H2O
C)  2C2H6 + 7 O2 → 4 CO2 + 6 H2O
D)  2 C2H6 + 5 O2 → 4 CO + 6 H2OE) A) and D)
F) A) and B)

Question 2

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.E) B) and D)
F) A) and B)

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)  1,1,2E) A) and B)
F) C) and D)

Question 4

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 × 1016
D)  2 × 1029E) A) and B)
F) C) and D)

Question 5

Catalytic converters reduce the amount of _____ in car exhaust.

Accepted Answer

A)  O3
B)  CO2
C)  CO
D)  N2E) C) and D)
F) None of the above

Question 6

Air is a(n)

Accepted Answer

A)  element.
B)  compound.
C)  mixture.
D)  pure substance.E) B) and C)
F) A) and D)

Question 7

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 dioxideE) B) and C)
F) A) and B)

Question 8

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 + O2E) All of the above
F) A) and B)

Question 9

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 pollutantE) C) and D)
F) B) and C)

Question 10

What is the primary component of an exhaled breath?

Accepted Answer

A)  N2
B)  O2
C)  CO2
D)  H2OE) A) and B)
F) A) and C)

Question 11

Which of the following would be described as "fine particles?"

Accepted Answer

A)  SOx
B)  NOx
C)  O3
D)  2.5 μm diameter sootE) All of the above
F) B) and C)

Question 12

What is the greatest source of indoor air pollution in developing countries?

Accepted Answer

A)  Unvented space heaters
B)  Cookstoves
C)  Automobiles
D)  PaintE) A) and B)
F) None of the above

Question 13

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)  15F) A) and E)
G) D) and E)

Question 14

Which is the balanced chemical equation for the reaction of nitrogen (N2)  with oxygen (O2)  to form NO?

Accepted Answer

A)  2 NO → N2 + O2
B)  N2 + O2 → NO
C)  N2 + O2 → 2 NO
D)  NO → N2 + O2E) All of the above
F) None of the above

Question 15

What two factors are considered when determining the risk assessment for air pollutants?

Accepted Answer

A)  Exposure and ppm
B)  Percentage and ppm
C)  Toxicity and percentage
D)  Toxicity and exposureE) All of the above
F) A) and C)

Question 16

Which component of the air is an element?

Accepted Answer

A)  H2O
B)  NO2
C)  O2
D)  CO2E) C) and D)
F) A) and B)

Question 17

The lowest (or closest to the ground)  layer of our atmosphere is the

Accepted Answer

A)  troposphere.
B)  ozone layer.
C)  stratosphere.
D)  mesosphere.E) A) and B)
F) A) and C)

Question 18

The ________ concentration in the air over the desert differs dramatically from that in the air in the tropical rainforest.

Accepted Answer

A)  N2
B)  O2
C)  CO2
D)  H2OE) B) and D)
F) B) and C)

Question 19

All of these pollutants can be detected by their odors except

Accepted Answer

A)  CO.
B)  O3.
C)  SOx.
D)  NOx.E) B) and C)
F) All of the above

Question 20

Which shows the balanced equation for the reaction of nitrogen (  ) ,as it is normally found in our atmosphere,with oxygen (  ) ,as it is normally found in our atmosphere,to form nitrogen dioxide?

Accepted Answer

A)   
B)   
C)   
D)   E) A) and D)
F) None of the above

Exam 2: The Air We Breathe

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.")

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Which shows the balanced equation for the reaction of nitrogen ( ) ,as it is normally found in our atmosphere,with oxygen ( ) ,as it is normally found in our atmosphere,to form nitrogen dioxide?

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What is the primary component of an exhaled breath?

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Which is the correct balanced equation for the complete combustion of ethane in excess oxygen?

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Which is the balanced chemical equation for the reaction of nitrogen (N2) with oxygen (O2) to form NO?

Correct AnswerverifiedShow Answer

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

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Which of the following would be described as "fine particles?"

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

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The ________ concentration in the air over the desert differs dramatically from that in the air in the tropical rainforest.

Correct AnswerverifiedShow Answer

All of these pollutants can be detected by their odors except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the greatest source of indoor air pollution in developing countries?

Correct AnswerverifiedShow Answer

What two factors are considered when determining the risk assessment for air pollutants?

Correct AnswerverifiedShow Answer

Ozone is a secondary pollutant.A secondary pollutant is

Correct AnswerverifiedShow Answer

The lowest (or closest to the ground) layer of our atmosphere is the

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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?

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Air is a(n)

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

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Which component of the air is an element?

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Catalytic converters reduce the amount of _____ in car exhaust.

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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.")

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Which is the balanced chemical equation for the reaction of nitrogen (N₂) with oxygen (O₂) to form NO?

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

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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?

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