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Chemistry 100 Practice Final ExamInstructions:
Do not begin the exam until you have been instructed to do so. You have 120 minutes to
complete this exam.
There are 50 multiple choice questions.
You must use a number 2 pencil.
You may use a scientific calculator.
Make sure that you have written your name legibly on the scantron form.
Circle bubbles on the scantron form as best as you can.
Answer all 50 questions.
If you cannot find an answer on the exam that you expected to see then answer the question as
best as you can.
Attached to the end of this exam are tables of SI prefixes, atomic numbers and masses, as
well as the periodic table.
Pick the BEST choice for each question.
Good Luck.
Print Name: ________________________
Signature: __________________________
, 1. Which of the following is an element?
A) salt
B) silicon
C) ammonia
D) carbon monoxide
2. Which of the following is a compound?
A) limestone
B) astatine
C) lithium
D) gold
3. Which of the following is a chemical property?
A) Water boils below 100°C on top of a mountain.
B) Lead is denser than aluminum
C) Oxygen gas supports combustion
D) Nitrogen is a gas at room temperature
4. What is the atomic weight of krypton?
A) 39.10
B) 83.80
C) 132.9
D) 78
5. What is the molar mass of Fe2O3 ?
A) 21.85
B) 87.85
C) 127.7
D) 159.7
6. What is 356 expressed in scientific notation?
A) 35.6 x 101
B) 3.56 x 102
C) 3.56 x 103
D) 3.56 x 10-2
7. What is 1.78 x 10-2 expressed as a decimal?
A) 0.0178
B) 0.178
C) 178
D) 1780
8. The number 9.0652 rounded to three significant figures is
A) 9.00
B) 9.07
C) 9.05
D) 9.06
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