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CHEM 280 MIDTERM EXAM AND FINAL EXAM 2026
EXAM ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS WITH DETAILED RATIONALES (100% CORRECT
VERIFIED SOLUTIONS) NEWEST UPDATED VERSION 2026
Which of the following is considered a hypothesis (as opposed to an
observation)?
a. Spiders have eight legs.
b. Fresh lava from a volcano is hot.
c. The Washington Monument is 555 feet tall.
d. Birds can fly because they have hollow bones.
e. one of the above ......ANSWER......d. Birds can fly because they have
hollow bones.
The distance from New York City to Washington, DC is approximately
235 miles. Identify the correct solution map to convert from miles to
kilometers using the prefix multipliers and the given conversion factors:
1 mile = 5280 ft; 1 ft = 12 in; 1 in = 2.54 cm. ......ANSWER......Refer to
photo on desktop.
The correct number of significant figures in the number 0.002320 is:
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a. 7
b. 4
c. 3
d. ambiguous
e. none of the above ......ANSWER......b. 4
The correct multiplier for the prefix milli is:
a) 10^ -3
b) 10^ -6
c) 10^ -9
d) 10^ -12
e) none of the above ......ANSWER......a) 10^ -3
Which statement would NOT be an example of "quantification"?
a. The newest model of that car gets five more miles per gallon than last
year's model.
b. The average high temperature this July was two degrees higher than
last year's average high temperature.
c. The price of milk went up ten cents per gallon.
d. The water in the swimming pool feels colder than it was yesterday.
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e. none of the above ......ANSWER......d. The water in the swimming
pool feels colder than it was yesterday.
What is quantification? ......ANSWER......the determination of the
absolute or relative abundance (often expressed as a concentration) of
one, several or all particular substance(s) present in a sample.
How many significant figures should be reported in the answer to the
following calculation?(4.00) ×× (11.1) =
a. 0
b. 2
c. 1
d. 3
e. none of the above ......ANSWER......d. 3
How many significant figures should be reported in the answer to the
following calculation?
((37.57)(13.332)) divided by (6.0)
a. 3
b. 2
c. 1
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e. 4 ......ANSWER......b. 2
A solution is an example of a (an):
a. heterogeneous mixture.
b. homogeneous mixture.
c. element.
d. pure substance.
e. compound. ......ANSWER......b. homogeneous mixture.
The correct prefix for the multiplier 100 is:
a. nano.
b. mega.
c. centi.
d. hecto.
e. none of the above ......ANSWER......d. hecto.
Which type of energy is associated with position?
a. electrical
b. kinetic
pg. 4
CHEM 280 MIDTERM EXAM AND FINAL EXAM 2026
EXAM ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS WITH DETAILED RATIONALES (100% CORRECT
VERIFIED SOLUTIONS) NEWEST UPDATED VERSION 2026
Which of the following is considered a hypothesis (as opposed to an
observation)?
a. Spiders have eight legs.
b. Fresh lava from a volcano is hot.
c. The Washington Monument is 555 feet tall.
d. Birds can fly because they have hollow bones.
e. one of the above ......ANSWER......d. Birds can fly because they have
hollow bones.
The distance from New York City to Washington, DC is approximately
235 miles. Identify the correct solution map to convert from miles to
kilometers using the prefix multipliers and the given conversion factors:
1 mile = 5280 ft; 1 ft = 12 in; 1 in = 2.54 cm. ......ANSWER......Refer to
photo on desktop.
The correct number of significant figures in the number 0.002320 is:
pg. 1
,2|Page
a. 7
b. 4
c. 3
d. ambiguous
e. none of the above ......ANSWER......b. 4
The correct multiplier for the prefix milli is:
a) 10^ -3
b) 10^ -6
c) 10^ -9
d) 10^ -12
e) none of the above ......ANSWER......a) 10^ -3
Which statement would NOT be an example of "quantification"?
a. The newest model of that car gets five more miles per gallon than last
year's model.
b. The average high temperature this July was two degrees higher than
last year's average high temperature.
c. The price of milk went up ten cents per gallon.
d. The water in the swimming pool feels colder than it was yesterday.
pg. 2
,3|Page
e. none of the above ......ANSWER......d. The water in the swimming
pool feels colder than it was yesterday.
What is quantification? ......ANSWER......the determination of the
absolute or relative abundance (often expressed as a concentration) of
one, several or all particular substance(s) present in a sample.
How many significant figures should be reported in the answer to the
following calculation?(4.00) ×× (11.1) =
a. 0
b. 2
c. 1
d. 3
e. none of the above ......ANSWER......d. 3
How many significant figures should be reported in the answer to the
following calculation?
((37.57)(13.332)) divided by (6.0)
a. 3
b. 2
c. 1
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e. 4 ......ANSWER......b. 2
A solution is an example of a (an):
a. heterogeneous mixture.
b. homogeneous mixture.
c. element.
d. pure substance.
e. compound. ......ANSWER......b. homogeneous mixture.
The correct prefix for the multiplier 100 is:
a. nano.
b. mega.
c. centi.
d. hecto.
e. none of the above ......ANSWER......d. hecto.
Which type of energy is associated with position?
a. electrical
b. kinetic
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