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CHEM 111 PRACTICE EXAM #1 SPRING 2008 FERGUSON
Circle the best answer.
Problems 1 – 15 are 4 points each. Problems 16 – 24 are 5 points each
(Show work on 5, 6, 7, 1623)
1. Identify the matter that is correctly classified as a compound.
1. nitrogen gas 2. gold 3. carbon disulfide 4. blood 5. pepsi
2. Which of the following is an element?
1. water 2. nitrate 3. silicon oxide 4. chlorine 5. ammonia
3. A student measures the mass of the same coin on three different days.
The results are 3.9 grams, 4.6
grams, and 5.3 grams. The coin’s actual mass is 4.5989g. The student’s
results are:
1. accurate and precise.
2. proof that the “actual” mass is incorrect.
3. precise but not accurate.
4. neither accurate or precise.
5. accurate but not precise.
4. The correct answer for
(2.750  2.708) is:
3.70
1] 0.011 2] 2.6 3] 0.01 4] 0.0114 5] none of these
5. What is the density of a liquid (in g/mL) if 4.75 mL of the liquid has a
mass of 5.02 g?
1] 1.0 g/mL 2] 0.946 g/mL 3] 1.06 g/mL 4] 5.02 g/mL 5] none of these
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 Winter '08
 Dukes

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