CHEMISTRY 111 PRACTICE EXAM
DUKES
Circle the best answer for each question.
Problems 1  14 are 3 points each.
Problems 15  24
are 5 points each.
102 Total points.
1.
Which of the following elements is a metal?
1. Br
2. C
3 . Se
4. Si
5. none of these.
.
2.
Properly expressed, the answer to the mathematical calculation
(0.243 x 4.2) + 21
1.
22
2.
22.0
3.
2.2
×
10
2
4.
22.02
5.
2.202
×
10
2
3.
Express 76 cm in inches.
(1 inch =
2.54 cm)
1.
2.5 in
2.
5.9 in
3.
30 in
4.
12 in
5.
38.10 in
4.
What is the volume of 25.0 g of an oil if its density is 0.843 g/mL?
1.
29.7 mL
2.
21.1 mL
3.
15.2 mL
4.
38.4 mL
5.
211 mL
5.
An atom is electrically neutral because
1.
it contains equal numbers of protons and electrons.
2.
it contains equal numbers of neutrons and electrons.
3. no charged particles are present in atoms.
4. the mass number and atomic number are equal.
5. none of these.
6.
Which symbol listed below describes a particle with 15 protons, 16
neutrons, and 16 electrons?
1.
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 Fall '08
 Dukes
 Chemistry, Atom, Mass, Neutron, equal numbers

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