Question 1

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 exposure 
A) Exposure and ppm 
B) Percentage and ppm 
C) Toxicity and percentage 
D) Toxicity and exposure

Question 2

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

Question 3

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 4

Air is a(n)

Accepted Answer

A) element. 
B) compound. 
C) mixture. 
D) pure substance. 
A) element. 
B) compound. 
C) mixture. 
D) pure substance.

Question 5

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) H2O 
A) N2 
B) O2 
C) CO2 
D) H2O

Question 6

What is the primary component of an exhaled breath?

Accepted Answer

A) N2 
B) O2 
C) CO2 
D) H2O 
A) N2 
B) O2 
C) CO2 
D) H2O

Question 7

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

Accepted Answer

A) troposphere. 
B) ozone layer. 
C) stratosphere. 
D) mesosphere. 
A) troposphere. 
B) ozone layer. 
C) stratosphere. 
D) mesosphere.

Question 8

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

Accepted Answer

A) SOx 
B) NOx 
C) O3 
D) 2.5 μm diameter soot 
A) SOx 
B) NOx 
C) O3 
D) 2.5 μm diameter soot

Question 9

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)    
A)    
B)    
C)    
D)

Question 10

All of these pollutants can be detected by their odors except

Accepted Answer

A) CO. 
B) O3. 
C) SOx. 
D) NOx. 
A) CO. 
B) O3. 
C) SOx. 
D) NOx.

Question 11

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 12

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 13

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 × 1029 
A) 2 × 1015 
B) 1.8 × 1017 
C) 2 × 1016 
D) 2 × 1029

Question 14

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

Question 15

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 16

Which component of the air is an element?

Accepted Answer

A) H2O 
B) NO2 
C) O2 
D) CO2 
A) H2O 
B) NO2 
C) O2 
D) CO2

Question 17

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 + O2 
A) 2 NO → N2 + O2 
B) N2 + O2 → NO 
C) N2 + O2 → 2 NO 
D) NO → N2 + O2

Question 18

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 19

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 H2O 
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 H2O

Question 20

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

Accepted Answer

A) Unvented space heaters 
B) Cookstoves 
C) Automobiles 
D) Paint 
A) Unvented space heaters 
B) Cookstoves 
C) Automobiles 
D) Paint

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

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

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.")

Air is a(n)

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

What is the primary component of an exhaled breath?

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

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

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?

All of these pollutants can be detected by their odors except

Ozone is a secondary pollutant.A secondary pollutant is

Catalytic converters reduce the amount of _____ in car exhaust.

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?

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

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

Which component of the air is an element?

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

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

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

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

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Exam 2: The Air We Breathe

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

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

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.")

Air is a(n)

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

What is the primary component of an exhaled breath?

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

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

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?

All of these pollutants can be detected by their odors except

Ozone is a secondary pollutant.A secondary pollutant is

Catalytic converters reduce the amount of _____ in car exhaust.

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?

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

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

Which component of the air is an element?

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

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

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

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

Portable Electronics: the Periodic Table in the Palm of Your Hand

Radiation From the Sun

Climate Change

Energy From Combustion

Energy From Alternative Sources

Energy Storage

Water Everywhere: A Most Precious Resource

The World of Polymers and Plastics

Brewing and Chewing

Nutrition

Health Medicine

Genes and Life

Who Killed Drthompson a Forensic Mystery

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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.")

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?

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

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