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Exam3FSI2CHEM1310 White
Name_ _ _ _ __
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) What is the concentration (M) of a NaCI solution prepared by dissolving 9.3 g of NaCl in sufficient water to give
~ of solution?
~5
B) 27
C) 0.16
D) 18
E) 2.7 x 10-2
2) Which ion(s) is/ are spectator ions in the formation of a precipitate of AgBr via combining aqueous solutions of
CoBr2 and AgN03?
A) N03- and BrB) c02+ and Ag+
(!}:r-02+ and N03­
D) Br-
E)NOJ­
3) Which of the following is an oxidation-reduction reaction? A) HCI (aq) + NaOH (aq) -+ H20 (1) + NaCl (aq) B) AgN03 (aq) + HCI (aq)
-+
AgCl (s) + HN03 (aq) C) H2C03 (aq) + Ca(N03)2 (aq) ....... 2HNOJ (aq) + CaC03 (s) D) Ba(C2H30z)2 (aq) + Na2S04 (aq) ....... BaS04 (s) + 2NaC2H30z (aq) ~ (s) + 2AgN03 (aq) ....... 2Ag (s) + Cu(N03)2 (aq) 4) Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2):
CaC2 (s) + 2H20 (g) ....... Ca(OH)2 (s) + C2H2 (g) Production of 13g of C2H2 requires consumption
A) 9.0
B) 4.5
_ _ _ _ gofH20.
C) 4.8 x 102
®
E) 4.8x 10-2
5) The correct name for K2S is _ _ _---' A) dipotassium sulfate B) potassium sulfate C) potassium disulfide D) potassium bisulfide @tassium sulfide 6) The correct name for HCI02 is _ _ _---' A) perchloric acid ~lorousacid
C) chloric acid D) hypychloric acid E) hypochlorous acid 7) A strong electrolyte is one that _ _ _ _ completely in solution.
A) decomposes
B) disappears
C) dissolves
1
D) reacts
~nizes
8) A compound that is composed of carbon, hydrogen, and oxygen contains 70.6% C, 5.9% H, and 23.5% 0 by
mass. The molecular weight of the compound is 136 amu. What is the molecular formula?
A) C9H120
B) C4H40
C) C8H40
~8H802
E) C5H602
9) When aqueous solutions of _ _ _ _ are mixed, a precipitate forms.
A) Li2C03 and CsI
B) NaI and KBr
C) K2S04 and CrC13
D) KOH and Ba(N03)2
~iBr2 and AgN03
10) The balanced net ionic equation for precipitation of CaC03 when aqueous solutions of Li2C03 and CaC12 are
mixed is _ _ _-----'
A) 2Li+ (aq) + 2Cl- (aq)
~
2LiCl (aq)
B) Li2C03 (aq) + CaC12 (aq) ...... 2LiCl (aq) + CaC03 (s)
1§:ta2 + (aq) + C032- (aq)
D) Li+ (aq) + Cl- (aq)
-+
-+
CaC03 (s)
LiCl (aq)
E) 2Li+ (aq) + C032- (aq)
-+
Li2C03 (aq)
11) The correct name for CC4 is _ _ _-----'
A) carbon tetra chlorate
B) carbon perchlorate
~rbon tetrachloride
D) carbon chlorate
E) carbon chloride
12) All weak electrolytes are _ _ _-----'
®nolecular
13) Oxidation is the
B) salts
C) ionic
D) acids
E) bases
and reduction is the _ _ _ _'
A) gain of oxygen, loss of electrons
B) gain of oxygen, loss of mass
® s s of electrons, gain of electrons
D) gain of electrons, loss of electrons
E) loss of oxygen, gain of electrons
14) The correct formula of iron(III) bromide is _ _ _-----'
A) FeBr
B) Fe3Br3
E) FeBr2
15) Which compound has the atom with the highest oxidation number?
A) Al(N02h
B) NH4Cl
C) CaS
2
D) Na3N
16) Lead carbonate decomposes to give lead oxide and carbon dioxide:
PbC03 (s) -- PbO (s) + C02 (g)
How many grams of lead oxide will be produced by the decomposition of 2.50 g of lead carbonate?
A) 2.50
®.09
C) 0.41
D) 2.61
E) 0.00936
17) Magnesium and nitrogen react in a combination reaction to produce magnesium nitride:
In a particular experiment, a 9.27-g sample ofN2 reacts completely. The mass ofMg consumed is
A) 16.1
B) 8.04
@4.1
D) 13.9
g.
E) 0.92
18) Which of the following is soluble in water at 25°C?
A) FeC03
B) F~(P04>2
E) FeS
C) Fe(OHh
19) Which of the following are strong acids?
1) m
2) HN03 3) HF 4) HBr A) 1,3,4
~,2,4
C) I, 2, 3, 4
D) 3,4
E) 2,3,4 20) Lithium and nitrogen react in a combination reaction to produce lithium nitride:
In a particular experiment, 3.50-g samples of each reagent are reacted. The theoretical yield of lithium nitride is
---g.
A) 17.6
B) 3.52
D) 8.7
E) 2.93
(9).85
21) The combustion of propane (C3H8 ) in the presence of excess oxygen yields C02 and H20:
When 7.3 g of C3H8 burns in the presence of excess 02, _ _ _ _ g of C02 is produced.
A) 2.4
B) 0.61
~
C) 7.3
E) 8.0 x 102
22) A 3.82-g sample of magnesium nitride is reacted with 7.73 g of water.
The yield of MgO is 3.60 g. What is the percent yield in the reaction? A) 94.5
B) 99.9
C) 49.4
3
~.8
E) 46.6