Name _____________________
CHEM 1004
Final Exam
Fall 2010
Circle the letter corresponding to the best choice for each of the following multiple choice
questions. Each question is worth 2 points.
1. Which of the following would constitute a chemical change?
a. the combustion of gasoline to drive your car
b. the cutting of a piece of wood into two pieces
c. the water in a pot on the stove boils and evaporates
d. a balloon is inflated from a helium cylinder
e. a nail is bent while hammering it into a piece of wood
2. A small amount of table salt is dissolved in water. The resulting solution is an example
of:
a. pure substance, element
b. pure substance, compound
c. homogeneous mixture
d. heterogeneous mixture
e. pure substance, homogeneous mixture
3. Which of the following is a method for expressing the prefix milli- ?
a. 10-1
b. 10-2
c. 10-3
d. 103
e. 101
4. 13.5 cm = ______________ km
a. 13500
b. 1.35 × 107
c. 0.0135
d. 0.000135
e. 1.35
c. 10
d. 1
e. 0.1
c. 100
d. 1
e. 0.01
5. How many mm are in 1.0 cm?
a. 1000
b. 100
6. How many mm2 are in 1.0 cm2?
a. 1000000
b. 10000
7. Based upon your extensive research into the periodic table and the history of its
development, the individual most associated with the development of the current periodic
table is:
a. Goldstein
b. Rutherford
c. Thomson
d. Bohr
e. Mendeleev
Page 1 of 7
8. Again, based upon your extensive research into the periodic table and the history of its
development, the time period most associated with the initial development of the current
periodic table is:
a. 1720’s
b. 1790’s
c. 1820’s
d. 1860’s
e. 1910’s
9. An neutral atom of the isotope of phosphorous that has a mass number of 32 contains
_____ protons, ______ neutrons, and ______ electrons.
a. 15, 32, 15
b. 15, 17, 15
c. 17, 15, 17
d. 15, 17, 20
e. 17, 32, 17
10. An ion of an isotope of oxygen with a mass number of 18 has a charge of -2. The ion
contains ________ protons, _________neutrons, and _________ electrons.
a. 10, 8, 8
b. 8, 10, 10
c. 8, 10, 8
d. 8, 10, 6
e. 10, 8, 10
11. The electron configuration for Si is given as:
a. 1s22s22p63s2
b. 1s22s22p63s23p1
c. 1s22s22p63s23p3
d. 1s22s22p63s13p2
e. 1s22s22p63s23p2
12. How many valence electrons are in an atom of Sn?
a. 0
b. 1
c. 2
d. 3
e. 4
13. Which of the following is the halogen family on the periodic chart?
a. Group 1
b. Group 2
c. Group 6
d. Group 17
e. Group 18
14. Which of the following is a transition metal?
a. Ru
b. As
c. Ba
d. In
Po
Page 2 of 7
15. The nitrate ion has the following formula:
a.
b.
c.
d.
e.
NO22N3NH3
NO3NO32-
16. The compound Mg3(PO4)2 is named:
a. magnesium phosphide
b. trimagnesium diphosphide
c. magnesium diphosphate
d. magnesium phosphate
e. manganese phosphate
17. The compound SO3 is named:
a. sulfur trioxide
b. sulfur oxide
c. sulfur tetroxide
d. sulfite
e. trisulfur oxide
18. When the following equation is balanced, the coefficient of Li(s) is:
Li (s) + N2 (g) → Li3N (s)
a. 1
b. 2
c. 3
d. 5
e. 6
19. When the following equation is balanced, the coefficient of O2(g) is:
C5H10O2 (ℓ) + O2 (g) → CO2 (g) +
a. 1
b. 3
c. 5
H2O (g)
d. 10
e. 13
20. Molecules moving rapidly in random directions, separated by a relatively distance, and
not experiencing any forces between them except at collision is a description of which
state of matter?
a. gas
b. liquid
c. solid
d. plasma
e. gel
Page 3 of 7
21. Which of the intermolecular forces are important the compound CH3F?
a.
b.
c.
d.
e.
dispersion
dispersion and dipole-dipole
dispersion and hydrogen bonding
dispersion, dipole-dipole, and hydrogen bonding
dipole-dipole and hydrogen bonding
22. Which of the following oxides would produce an acid when dissolved in water?
a.
b.
c.
d.
e.
tin (IV) oxide
aluminum oxide
carbon dioxide
magnesium oxide
barium oxide
23. If the pH of a solution is 3.5, the closest value to the hydrogen ion concentration is:
a.
b.
c.
d.
e.
3 × 10-3 M
3 × 10-4 M
3 × 10-5 M
3 × 10-7 M
3 × 10-12 M
24. Which of the following is NOT a definition of an oxidation process?
a. a gain of oxygen
b. a loss of hydrogen
c. a gain of electrons
d. a loss of electrons
e. an increase in ion charge
25. Pentane has several isomers. The structure for pentane where all of the carbons are in a
line is:
a.
b.
c.
d.
e.
CH3CH3
CH3CH2CH3
CH3CH2CH2CH3
CH3CH2CH2CH2CH3
CH3CH2CH2CH2CH2CH3
Page 4 of 7
Short answer and problems. Show your work to receive partial credit. Point totals are indicated
in parentheses to the right of each problem number.
26. (6 points) Answer each of the following questions. Show your work.
a. How many grams are in 3.45-mol of H2O?
b. How many atoms of Cl are in 500 molecules of CH2Cl2?
c. How many moles of CH4 are in 155.0-g of CH4?
27. (5 points) Fill in the missing information on the underlines in the table below.
Formula
_____________________
Name
sodium chloride
CuNO3
___________________________
P 2 O5
___________________________
______________________
iron (III) oxide
______________________
sulfur hexafluoride
28. (4 points) What is the pressure of 2.0-mol of He gas confined to a volume of 45.0-L at a
temperature of 350 K? Important equations are available toward the back of the test.
Page 5 of 7
29. (6 points) Draw Lewis structures for the following molecules.
a. CHF3
b. NCl3
c. NO2-
30. ( 4 points) Complete each of the following nuclear reactions by filling in the missing
particle.
179
79
Au  175
77 Ir  ______
1
U  01n  102
39Y  _____  3 0 n
235
92
31. (2 points) A piece of wood from an Egyptian tomb has carbon-14 activity of
490 counts/hour. A piece of new wood of the same size gave 3920 counts/hour. What is
the age of the wood from the tomb? The half-life of 14C is 5730 years.
Page 6 of 7
Potentially useful information:
PV = nRT
R = 0.08206 L·atm/mol·K
Page 7 of 7