1
CHEM 1020 FINAL EXAM AND STUDY GUIDE NEWEST
2026 TEST BANK| COMPLETE 550 REAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+| CHEM 1020 FINAL EXAM
PREP (MOST RECENT!!)
Which of the following is a pure substance?
A. Concrete
B. Gasoline
C. Silver wire
D. Lemonade – Correct Answer - Silver wire
The quantity 0.0000064 g expressed in scientific notation.
A. 6.4 × 10¯6 g
B. 6.4 × 107 g
C. 6.4 × 106 g
D. 6.4 × 10¯7 g – Correct Answer - 6.4 × 10¯6 g
Currently, the primary source of sulfur dioxide emissions into the
atmosphere is
A. coal burning power plants.
B. plastic manufacturing.
C. diesel trucks.
D. gasoline-powered lawnmowers. – Correct Answer - coal burning
power plants.
pg. 1
, 2
All of these pollutants can be detected by their odors except
A. NOx.
B. O3.
C. CO.
D. SOx. – Correct Answer - CO.
Which carbon compound contains the fewest carbon atoms?
A. Ethanol
B. Chlorobutane
C. Propyl alcohol
D. Methane – Correct Answer - Methane
What two factors are considered when determining the risk assessment
for air pollutants?
A. Exposure and ppm
B. Toxicity and percentage
C. Toxicity and exposure
D. Percentage and ppm – Correct Answer - Toxicity and exposure
The EPA limit for CO is 9 ppm. Express this number as a percentage.
A. 0.09 percent
B. 9 percent
C. 0.0009 percent
D. 90 percent – Correct Answer - 0.0009 percent
pg. 2
, 3
Which chemical components are given off in car exhaust?
A. CO2
B. NOx
C. H2O
D. All of these choices are correct – Correct Answer - D
Which is the balanced chemical equation for the reaction of nitrogen
(N2) with oxygen (O2) to form NO?
A. NO → N2 + O2
B. 2 NO → N2 + O2
C. N2 + O2 → 2 NO
D. N2 + O2 → NO – Correct Answer - N2 + O2 → 2 NO
What is the primary component of an exhaled breath?
A. N2
B. CO2
C. O2
D. H2O – Correct Answer - N2
How many carbon atoms does the molecule octane have?
A. 4
B. 2
C. 8
D. 0 – Correct Answer - 8
pg. 3
, 4
What is the role of polar stratospheric clouds (PSCs) on the destruction
of ozone?
A. They play no role
B. The clouds are made of chlorine atoms from CFCs
C. The cold clouds react with ozone to make oxygen molecules and
oxygen atoms
D. Chemical reactions occur on the clouds that convert molecules that
do no damage to those that deplete ozone. – Correct Answer - Chemical
reactions occur on the clouds that convert molecules that do no damage
to those that deplete ozone.
Which substances are regulated by the Kyoto Protocol?
i. argon
ii. carbon dioxide
iii. nitrogen
iv. nitrous oxide
v. sulfur hexafluoride
A. i and iii only
B. i, ii, and iii only
C. ii and v only
D. ii, iv, and v only – Correct Answer - ii, iv, and v only
LP gas (liquid propane, C3H8) is the fuel used in gas grills as well as a
main source of heat energy for many rural residences. What is the mass
of 5.83 × 1017 molecules of liquid propane?
pg. 4
CHEM 1020 FINAL EXAM AND STUDY GUIDE NEWEST
2026 TEST BANK| COMPLETE 550 REAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+| CHEM 1020 FINAL EXAM
PREP (MOST RECENT!!)
Which of the following is a pure substance?
A. Concrete
B. Gasoline
C. Silver wire
D. Lemonade – Correct Answer - Silver wire
The quantity 0.0000064 g expressed in scientific notation.
A. 6.4 × 10¯6 g
B. 6.4 × 107 g
C. 6.4 × 106 g
D. 6.4 × 10¯7 g – Correct Answer - 6.4 × 10¯6 g
Currently, the primary source of sulfur dioxide emissions into the
atmosphere is
A. coal burning power plants.
B. plastic manufacturing.
C. diesel trucks.
D. gasoline-powered lawnmowers. – Correct Answer - coal burning
power plants.
pg. 1
, 2
All of these pollutants can be detected by their odors except
A. NOx.
B. O3.
C. CO.
D. SOx. – Correct Answer - CO.
Which carbon compound contains the fewest carbon atoms?
A. Ethanol
B. Chlorobutane
C. Propyl alcohol
D. Methane – Correct Answer - Methane
What two factors are considered when determining the risk assessment
for air pollutants?
A. Exposure and ppm
B. Toxicity and percentage
C. Toxicity and exposure
D. Percentage and ppm – Correct Answer - Toxicity and exposure
The EPA limit for CO is 9 ppm. Express this number as a percentage.
A. 0.09 percent
B. 9 percent
C. 0.0009 percent
D. 90 percent – Correct Answer - 0.0009 percent
pg. 2
, 3
Which chemical components are given off in car exhaust?
A. CO2
B. NOx
C. H2O
D. All of these choices are correct – Correct Answer - D
Which is the balanced chemical equation for the reaction of nitrogen
(N2) with oxygen (O2) to form NO?
A. NO → N2 + O2
B. 2 NO → N2 + O2
C. N2 + O2 → 2 NO
D. N2 + O2 → NO – Correct Answer - N2 + O2 → 2 NO
What is the primary component of an exhaled breath?
A. N2
B. CO2
C. O2
D. H2O – Correct Answer - N2
How many carbon atoms does the molecule octane have?
A. 4
B. 2
C. 8
D. 0 – Correct Answer - 8
pg. 3
, 4
What is the role of polar stratospheric clouds (PSCs) on the destruction
of ozone?
A. They play no role
B. The clouds are made of chlorine atoms from CFCs
C. The cold clouds react with ozone to make oxygen molecules and
oxygen atoms
D. Chemical reactions occur on the clouds that convert molecules that
do no damage to those that deplete ozone. – Correct Answer - Chemical
reactions occur on the clouds that convert molecules that do no damage
to those that deplete ozone.
Which substances are regulated by the Kyoto Protocol?
i. argon
ii. carbon dioxide
iii. nitrogen
iv. nitrous oxide
v. sulfur hexafluoride
A. i and iii only
B. i, ii, and iii only
C. ii and v only
D. ii, iv, and v only – Correct Answer - ii, iv, and v only
LP gas (liquid propane, C3H8) is the fuel used in gas grills as well as a
main source of heat energy for many rural residences. What is the mass
of 5.83 × 1017 molecules of liquid propane?
pg. 4
