Exam 2 FS12 CHEM 1310 VERSION Yellow
Name_ _ _ _ _ _ _ _ _ _ _ _ __
MUL TIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Calculate the percent~nitrogen in PtCI2(NH3)2.
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A) 12.67
C) 4.95
E) 9.90
0) 4.67
2) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg (s) + 02 (g) -- 2MgO (s)
When 4.00 g of magnesium burns, the theor~~~magnesium oxide is ____ g.
A) 4.00
B) 3.32
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E) 0.165
0) 13.3
3) Lithium and nitrogen react in a combination reaction to produce lithium nitride:
How many moles of lithium nitride are produced when 0.450 mol of lithium react in this
A) 1.35
B) 0.0750
C) 0.900
0) 0.225
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4) The molecular weight of the acetic acid (CH3C02H) is _ _ __ amu. A) 32
B) 44
C)48 5) Expressing a number in scientific notation _ _ _ _. A) removes significant zeros B) changes its value ~moves ambiguity as to the significant figures 0) allows to increase the number's precision E) all of the above 6) The formula weight of potassium phosphate (K3P04) is _ _ _ _ amu.
A) 251.37
7) Which one of the
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12.27
follow~s
A) (NH4)2S04
C) 196.27
0) 86.07
E) 173.17
the correct formula for ammonium sulfide? ~.~)}NH4)2S
C) NH3S
0) NH4S03 8) The correct name for SO is _ _ _ _. A) sulfite B) sulfoxide C) sulfate ~sulfur monoxide E) sulfur oxide 9) How many liters of wine can be held in a wine barrel whose capacity is 26.0 gal? 1 gal = 4 gt = 3.7854 L.
A) 6.87
B) 0.146
C) 1.46 x 10-4
8.4
E) 6.87 x 103
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10) The correct name for CCl4 is _ _ __
A) carbon chlorate
B) carbon chloride
C) carbon perchlorate
c.:::Q2):arbon tetrachloride
E) carbon tetra chlorate
11) The combustion of propane (C3H8) in the presence of excess oxygen yields C02 and H20:
When 2.5 mol of 02 are consumed in their reaction, _ _ _ _ mol of C02 are produced.
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A) 2.5
C) 5.0
D) 6.0 E) 3.0
12) When the following equation is balanced, the coefficient of water is _ _ __
K (s) + H20 (1)_--' KOH (aq) + H2 (g)
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A)l
D) 5 C)3
E)4
13) The formula weight of magnesium fluoride (MgF2) is _ _ _ _ amu.
A) 92.9
B) 43.3
C) 67.6
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2.3
E) 86.6
14) The formula weight of aluminum sulfate ((AI2S04)3) is _ _ _ _ amu.
A) 59.04
B) 123.04
C) 273.06
D) 150.14
~42.14
15) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg (s) + 02 (g) --. 2MgO (s)
How many moles of 02 are consumed when 0.770 mol of magnesium burns?
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.385
B) 0.0317
C) 2.60
D) 0.770
E) 1.54
16) The formula for the compound formed between aluminum ions and phosphate ions is _ _ _~
~lP04
B) Al(P04)3
C) AlP
D) A13(P04)3
17) 45 m/s = _ _ _ _ kIn/hr
A) 0.045
B) 2.7
' Yl.6xl02
D) 1.6 x 105
E) 2.7 x 103
18) What is the empirical formula of a hydrocarbon that contains 89.94% C by mass?
~C3H4
B)C9 H I0
C)C4 H 3
D)C8 H 6
19) What is the length of the side of a cube (in em) that has a volume of 44.4 L?
~5.4
B) 875
C) 6.66
2
D) 0.354
E) 66.6
20) Chromium and chlorine form an ionic compound whose formula is CrCl3. The name of this compound is
~hrom:um(III) chloride B) monochromium trichloride C) chromic trichloride D) chromium(III) trichloride E) chromium chlorine 21) (W; en calcium reacts with sulfur the compound formed is
~ CaS
B) Ca2S3
C) CaS2
22) Gaseous argon has a density of 1.40 giL at standard conditions. How many argon atoms are in 1.00 L of argon
gas at standard conditl~s]
A) 3.4 x 10 25
2.1 x 10 22
C) 1.5 x 10 25
D) 4.7 x 1022
E) 6.02 x 1023
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