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1) When aqueous solutions of AgNO3 and KI are mixed, AgI precipitates. The balanced
net ionic equation is ________.
A) Ag+ (aq) + I- → (aq) AgI (s)
B) Ag+ (aq) + NO3
- (aq) → AgNO3 (s)
C) Ag+ (aq) + NO3
- (aq) → AgNO3 (aq)
D) AgNO3 (aq) + KI (aq) → AgI (s) + KNO3 (aq)
E) AgNO3 (aq) + KI (aq) → AgI (aq) + KNO3 (s)
2) Which one of the following is the correct electron configuration for a ground-state
nitrogen atom?
A)
B)
C)
D)
E) None of the above is correct.
3) Calculate the molarity of phosphoric acid (H3PO4) in a 22.1% (by mass) aqueous
solution.
A) 0.0522 m
B) 0.0992 m
C) 0.0248 m
D) 0.0496 m
E) The density of the solution is needed to solve the problem.
4) If an object, beginning at rest, is moving at a speed of 700 m/s after 2.75 min, its rate
of acceleration (in m/s2) is ________. (Assume that the rate of acceleration is constant.)
A) 1.16 X 105
B) 255
C) 193
D) 4.24
E) 1.53 X 104
5) A compound contains 40.0% C, 6.71% H, and 53.29% O by mass. The molecular
weight of the compound is 60.05 amu. The molecular formula of this compound is
________.
A) C2H4O2
B) CH2O
C) C2H3O4
D) C2H2O4
E) CHO2
6) One method for removal of metal ions from a solution is to convert the metal to its
elemental form so it can be filtered out as a solid. Which metal can be used to remove
aluminum ions from solution?
A) zinc
B) cobalt
C) lead
D) copper
E) none of these
7) Based on molecular orbital theory, the bond order of the N-N bond in the N2
molecule is ________.
A) 0
B) 1/2
C) 3
D) 2
E) 1
8) The volume of 0.25 mol of a gas at 72.7 kPa and 15 °C is ________ m3.
A) 8.1 x 10-5
B) 1.2 x 10-4
C) 4.3 x 10-4
D) 8.2 x 10-3
E) 2.2 x 10-1
9) Of the atoms below, ________ is the most electronegative.
A) C
B) Si
C) Ge
D) B
E) Al
10) What is the concentration (M) of CH3OH in a solution prepared by dissolving 11.7
g of CH3OH in sufficient water to give exactly 330. mL of solution?
A) 11.9
B) 1.11
C) 0.00159
D) 1.59
E) 0.0841
11) Osmium has a density of 22.6 g/cm3. The mass of a block of osmium that measures
1.01 cm X 0.233 cm X 0.648 cm is ________ g.
A) 6.75 X 10-3
B) 3.45
C) 148
D) 6.75 X 103
E) 34.5
12) The ligand with the name aqua when used in complexes with transition metals has
the formula ________.
A) H2O
B) H2O2
C) HO-
D) N3
-
E) H3O+
13) There are ________ σ and ________ π bonds in the molecule.
A) 4, 2
B) 6, 4
C) 2, 2
D) 2, 6
E) 6, 2
14) Classify the following compounds as weak acids (W) or strong acids (S):
nitrous acid
hydrochloric acid
hydrofluoric acid
A) W W W
B) S S S
C) S W W
D) W S S
E) W S W
15) Using the VSEPR model, the electron-domain geometry of the central atom in O3 is
________.
A) linear
B) trigonal planar
C) tetrahedral
D) trigonal bipyramidal
E) octahedral
16) A closed-end manometer was attached to a vessel containing argon. The difference
in the mercury levels in the two arms of the manometer was 9.60 cm. Atmospheric
pressure was 783 mm Hg. The pressure of the argon in the container was ________ mm
Hg.
A) 96.0
B) 661
C) 773
D) 793
E) 882
