Chem 280 Mock Midterm Exam - Comprehensive Review and Practice Exam Questions & Answer Key with Complete Solution 100% Correct | New 2026 | Graded A+

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Chem 280 Mock Midterm Exam - Comprehensive Review and
Practice Exam Questions & Answer Key with Complete
Solution 100% Correct | New 2026 | Graded A+

Mock Midterm Exam

1) The definition of a scientific law is: A)
the same as a hypothesis.
B) a way of learning that emphasizes observation and experimentation.
C) the underlying reason for a scientific theory.
D) a number of similar observations generalized into a brief statement summarizing past observations and
predicting new ones. E) none of the above



2) Write 0.000 000 33 in scientific notation.
A) 3.3 × 107
B) 3.3 × 10-7
C) 3.3 × 10-8
D) 3.3 × 108
E) 3.3


3) The correct scientific notation for the number 0.00050210 is:
A) 5.0210 × 104
B) 5.021 ×10-4
C) 5.021 ×104
D) 5.0210 ×10-4
E) none of the above


4) Determine the answer for the equation below with correct number of significant figures:
1.2 × 1.79 = ________
A) 2.148
B) 2.15
C) 2.1
D) 2.2
E) none of the above




5) The correct prefix for the multiplier 1,000,000 is:

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A) mega.
B) milli.
C) micro.
D) nano.
E) none of the above




6) The correct multiplier for the prefix pico is:
A) 10-3
B) 10-6
C) 10-9
D) 10-12
E) none of the above



7) How many grams are in 1.48 ×107μg?
A) 1.48 × 103
B) 1.48 × 1013
C) 1.48
D) 14.8
E) none of the above


8) How many low dose 81 mg aspirin tablets can be made from 1.21 kg of aspirin?
A) 1.5 × tablets
B) 1.5 × tablets
C) 1.5 × tablets
D) 1.21 × tablets
E) 1.21 × tablets


9) The jet fuel in an airplane has a mass of 97.5 kg and a density of 0.804 g/cm3. What is the
volume of this jet fuel?
A) 7.84 × cm3
B) 7.84 × cm3
C) 1.21 × cm3
D) 1.21 × cm3
E) none of the above