Question 1

A(n) __________ is a fixed number of atoms held together by chemical bonds in a certain spatial arrangement.

Accepted Answer

A)  element
B)  ion
C)  molecule
D)  mixtureE) None of the above
F) All of the above

Question 2

The burning of coal produces sulfur dioxide,SO2,a pollutant that slowly reacts in air to form SO3.Sulfur trioxide dissolves into airborne water droplets to form a very corrosive solution of sulfuric acid.Which is a product of burning coal that hastens the transformation of sulfur dioxide into sulfur trioxide?

Accepted Answer

A)  carbon dioxide
B)  carbon monoxide
C)  nitrogen dioxide
D)  particles of ashE) A) and B)
F) C) and D)

Question 3

The highest (or uppermost) layer of our atmosphere is the

Accepted Answer

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

Question 4

P2O5 is the chemical formula for

Accepted Answer

A)  pentoxygen diphosphide.
B)  diphosphorus pentoxide.
C)  dioxygen pentaphosphide.
D)  monophosphorus pentoxide.E) A) and C)
F) A) and D)

Question 5

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

Question 6

Which square(s) contain(s) only one or more compounds?

Accepted Answer

A)  I only
B)  II only
C)  I and IV only
D)  II and III onlyE) A) and B)
F) A) and C)

Question 7

Which square(s) contain(s) only an element?

Accepted Answer

A)  I only
B)  II only
C)  I and II only
D)  III and IV onlyE) B) and D)
F) B) and C)

Question 8

What is the primary component of an exhaled breath?

Accepted Answer

A)  N2
B)  O2
C)  CO2
D)  H2OE) A) and B)
F) None of the above

Question 9

Which symbols represent only elements that are metals?

Accepted Answer

A)  X and Z
B)  X and Q
C)  P and L
D)  X,R,P,and QE) B) and D)
F) C) and D)

Question 10

Which squares contain mixtures?

Accepted Answer

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

Question 11

Which pollutant is found both indoors and outdoors,but it most likely to be toxic indoors?

Accepted Answer

A)  CO
B)  O3
C)  NO2
D)  SO2E) None of the above
F) B) and D)

Question 12

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) None of the above
F) A) and B)

Question 13

Which is the following incorrectly represents a combustion reaction?

Accepted Answer

A)  2 CH4 + 3 O2 → 2 CO2 + 2 H2O
B)  S8 + 8 O2 → 8 SO2
C)  N2 + 2 O2 → 2 NO2
D)  C3H8 + O2 → 3 CO2E) B) and D)
F) A) and B)

Question 14

Which of the following is the correct name for SF6?

Accepted Answer

A)  Monosulfur Hexafluoride
B)  Sulfur Hexafluorite
C)  Sulfur Fluoride
D)  Sulfur HexafluorideE) None of the above
F) A) and B)

Question 15

Which of the following is a pure substance?

Accepted Answer

A)  Lemonade
B)  Concrete
C)  Gasoline
D)  Silver wireE) B) and C)
F) A) and B)

Question 16

Which differentiates a compound from a mixture of two or more elements?

Accepted Answer

A)  The elements in a compound may be present in varying proportions.
B)  A compound does not exhibit the individual properties of the elements of which it is composed.
C)  A compound is made up of only one element.
D)  A compound cannot be made up of more than two elements.E) B) and D)
F) C) and D)

Question 17

Critique the statement: "Air pollution is an unavoidable by-product of an industrialized society-the more modern we become the more air pollution we will have."

Accepted Answer

A)  This is a reasonable statement since burning fossil fuels is necessary for industrialization and unavoidably produces pollutants.
B)  Although burning fossil fuels does produce air pollutants,technology may prevent these pollutants from increasing in the atmosphere as we become more industrialized.
C)  Air pollution is not inevitable if we could raise the temperature at which fossil fuels are burned.
D)  Burning fossil fuels does not have to produce potential pollutants,but it does because of the unwillingness of government and industry to spend additional money.E) B) and C)
F) A) and C)

Question 18

Based on its name,which carbon compound contains the fewest carbon atoms?

Accepted Answer

A)  ethanol
B)  methane
C)  chlorobutane
D)  propyl alcoholE) None of the above
F) A) and C)

Question 19

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

Accepted Answer

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

Question 20

The chemist,at about the time of the American Civil War,given the greatest credit for developing the most common way of arranging the elements,thus leading to the Periodic Table of today,is

Accepted Answer

A)  Einstein.
B)  Pasteur.
C)  Mendeleev.
D)  Galileo.E) B) and C)
F) A) and C)

Exam 1: The Air We Breathe

Which differentiates a compound from a mixture of two or more elements?

Correct Answer
verified

Which pollutant is found both indoors and outdoors,but it most likely to be toxic indoors?

Correct Answer
verified

Which square(s) contain(s) only an element?

Correct Answer
verified

Which squares contain mixtures?

Correct Answer
verified

P₂O₅ is the chemical formula for

Correct Answer
verified

The highest (or uppermost) layer of our atmosphere is the

Correct Answer
verified

A(n) __________ is a fixed number of atoms held together by chemical bonds in a certain spatial arrangement.

Correct Answer
verified

What is the primary component of an exhaled breath?

Correct Answer
verified

The chemist,at about the time of the American Civil War,given the greatest credit for developing the most common way of arranging the elements,thus leading to the Periodic Table of today,is

Correct Answer
verified

Which symbols represent only elements that are metals?

Correct Answer
verified

Critique the statement: "Air pollution is an unavoidable by-product of an industrialized society-the more modern we become the more air pollution we will have."

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Which is the following incorrectly represents a combustion reaction?

Correct Answer
verified

Based on its name,which carbon compound contains the fewest carbon atoms?

Correct Answer
verified

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

Correct Answer
verified

Which of the following is a pure substance?

Correct Answer
verified

Which square(s) contain(s) only one or more compounds?

Correct Answer
verified

Which of the following is the correct name for SF₆?

Correct Answer
verified

Exam 1: The Air We Breathe

Which differentiates a compound from a mixture of two or more elements?

Correct AnswerverifiedShow Answer

Which pollutant is found both indoors and outdoors,but it most likely to be toxic indoors?

Correct AnswerverifiedShow Answer

Which square(s) contain(s) only an element?

Correct AnswerverifiedShow Answer

Which squares contain mixtures?

Correct AnswerverifiedShow Answer

P2O5 is the chemical formula for

Correct AnswerverifiedShow Answer

The highest (or uppermost) layer of our atmosphere is the

Correct AnswerverifiedShow Answer

A(n) __________ is a fixed number of atoms held together by chemical bonds in a certain spatial arrangement.

Correct AnswerverifiedShow Answer

What is the primary component of an exhaled breath?

Correct AnswerverifiedShow Answer

The chemist,at about the time of the American Civil War,given the greatest credit for developing the most common way of arranging the elements,thus leading to the Periodic Table of today,is

Correct AnswerverifiedShow Answer

Which symbols represent only elements that are metals?

Correct AnswerverifiedShow Answer

Critique the statement: "Air pollution is an unavoidable by-product of an industrialized society-the more modern we become the more air pollution we will have."

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which is the following incorrectly represents a combustion reaction?

Correct AnswerverifiedShow Answer

Based on its name,which carbon compound contains the fewest carbon atoms?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is a pure substance?

Correct AnswerverifiedShow Answer

Which square(s) contain(s) only one or more compounds?

Correct AnswerverifiedShow Answer

Which of the following is the correct name for SF6?

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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P₂O₅ is the chemical formula for

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

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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Which of the following is the correct name for SF₆?

Correct Answer
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