Question 1

Which is not a single pure substance?

Accepted Answer

A)  copper
B)  water
C)  brass
D)  chlorineE) B) and C)
F) A) and B)

Question 2

Which component of the air is an element?

Accepted Answer

A)  H2O
B)  NO2
C)  O3
D)  CO2E) None of the above
F) C) and D)

Question 3

Which color,as used in the Air Quality Index,warns that the level of a pollutant is hazardous,the most dangerous level?

Accepted Answer

A)  orange
B)  green
C)  yellow
D)  maroonE) None of the above
F) A) and D)

Question 4

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

Accepted Answer

A)  SOx
B)  NOx
C)  O3
D)  2.5 μm diameter sootE) A) and C)
F) A) and B)

Question 5

If 500 mL of air contains 2 x 1022 particles (atoms and molecules) ,how many particles do you inhale in one day if you breathe 15000 L of air?

Accepted Answer

A)  2 x 1022
B)  6 x 1026
C)  1.2 x 1027
D)  5 x 1024E) B) and C)
F) A) and C)

Question 6

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 7

Green chemistry is

Accepted Answer

A)  the study of how to improve the production of oxygen via photosynthesis.
B)  any chemistry having an agricultural base.
C)  the cause of the higher temperatures and humidity typically found in greenhouses.
D)  the design of products and processes that reduce hazardous substances.E) B) and C)
F) A) and D)

Question 8

During a chemical reaction,

Accepted Answer

A)  atoms are rearranged.
B)  some atoms are destroyed and new ones are formed.
C)  some elements are destroyed and new ones are formed.
D)  the law of conservation of matter and mass may be briefly violateD.E) A) and B)
F) A) and C)

Question 9

A compound and a mixture differ in that only the mixture

Accepted Answer

A)  is made up of more than one element.
B)  may be made up of components that may be molecules.
C)  is of fixed composition.
D)  exhibits the properties of its individual components.E) A) and C)
F) None of the above

Question 10

Which two gases make up more than 95% of an inhaled breath?

Accepted Answer

A)  NO2 and N2
B)  CO2 and O2
C)  O2 and N2
D)  N2 and ArE) B) and C)
F) A) and C)

Question 11

Which is not a pure substance?

Accepted Answer

A)  helium
B)  copper wire
C)  air
D)  sucroseE) None of the above
F) A) and C)

Question 12

Although only about 100 elements exist,over __________________ compounds have been isolated,identified,and characterized.

Accepted Answer

A)  one hundred thousand
B)  one million
C)  20 million
D)  10 billionE) A) and C)
F) None of the above

Question 13

Which is not a mixture?

Accepted Answer

A)  a jar filled with rocks and sand
B)  sea water
C)  a glass of Kool-Aid
D)  sodium chlorideE) A) and B)
F) A) and C)

Question 14

The United States has more vehicles per capita than any other country,but cleaner air than many other countries because it

Accepted Answer

A)  has more electric vehicles.
B)  has fewer people living in cities.
C)  has more governmental regulations on air quality.
D)  is a large country so pollutants can spread out more.E) B) and C)
F) A) and C)

Question 15

In general,which airborne material is not likely to be affected by the filters or indoor air handling equipment?

Accepted Answer

A)  particulates
B)  pollen
C)  soot
D)  carbon monoxideE) B) and D)
F) None of the above

Question 16

Which symbol(s) represent(s) elements in the noble gas family?

Accepted Answer

A)  X and Z
B)  P and L
C)  Q
D)  YE) A) and C)
F) B) and C)

Exam 1: The Air We Breathe

In general,which airborne material is not likely to be affected by the filters or indoor air handling equipment?

Correct Answer
verified

Which two gases make up more than 95% of an inhaled breath?

Correct Answer
verified

Although only about 100 elements exist,over __________________ compounds have been isolated,identified,and characterized.

Correct Answer
verified

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

Correct Answer
verified

A compound and a mixture differ in that only the mixture

Correct Answer
verified

Which is not a mixture?

Correct Answer
verified

Which component of the air is an element?

Correct Answer
verified

Which is not a pure substance?

Correct Answer
verified

During a chemical reaction,

Correct Answer
verified

Green chemistry is

Correct Answer
verified

The United States has more vehicles per capita than any other country,but cleaner air than many other countries because it

Correct Answer
verified

Which symbol(s) represent(s) elements in the noble gas family?

Correct Answer
verified

Which color,as used in the Air Quality Index,warns that the level of a pollutant is hazardous,the most dangerous level?

Correct Answer
verified

If 500 mL of air contains 2 x 10²² particles (atoms and molecules) ,how many particles do you inhale in one day if you breathe 15000 L of air?

Correct Answer
verified

Which is not a single pure substance?

Correct Answer
verified

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

Correct Answer
verified

Exam 1: The Air We Breathe

In general,which airborne material is not likely to be affected by the filters or indoor air handling equipment?

Correct AnswerverifiedShow Answer

Which two gases make up more than 95% of an inhaled breath?

Correct AnswerverifiedShow Answer

Although only about 100 elements exist,over __________________ compounds have been isolated,identified,and characterized.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A compound and a mixture differ in that only the mixture

Correct AnswerverifiedShow Answer

Which is not a mixture?

Correct AnswerverifiedShow Answer

Which component of the air is an element?

Correct AnswerverifiedShow Answer

Which is not a pure substance?

Correct AnswerverifiedShow Answer

During a chemical reaction,

Correct AnswerverifiedShow Answer

Green chemistry is

Correct AnswerverifiedShow Answer

The United States has more vehicles per capita than any other country,but cleaner air than many other countries because it

Correct AnswerverifiedShow Answer

Which symbol(s) represent(s) elements in the noble gas family?

Correct AnswerverifiedShow Answer

Which color,as used in the Air Quality Index,warns that the level of a pollutant is hazardous,the most dangerous level?

Correct AnswerverifiedShow Answer

If 500 mL of air contains 2 x 1022 particles (atoms and molecules) ,how many particles do you inhale in one day if you breathe 15000 L of air?

Correct AnswerverifiedShow Answer

Which is not a single pure substance?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

If 500 mL of air contains 2 x 10²² particles (atoms and molecules) ,how many particles do you inhale in one day if you breathe 15000 L of air?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified