Exam 2 FS12 CHEM 1310 VERSION BLUE
Name_ _ _ _ __ _ _ _ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) How many liters of wine can be held in a wine barrel whose capacity is 26.0 gal? 1 gal= 4 qt = 3.7854 L. A) 6.87
B) 8.4
4
C) 1.46 x 10-
D) 0.146
E) 6.87 x 10
3
2) What is the length of the side of a cube (in cm) that has a volume of 44.4 L? A) 6.66
B) 875
~ C
5.4
D) 0.354
E) 66.6 3) 45 m/s =_ _ km/hr A) 0.045
B) 2.7
C) 2.7 X 103
D) 1.6 X 10
5
4) Expressing a number in scientific notation __. A) removes significant zeros B) changes its value C) allows to increase the number's precision ~ removes
ambiguity as to the significant figures
E) all of the above
5) The formula for the compoun d f ormed between aluminum ions and phosphate ions is ~'
A) AlP
B) AI(P0 4 h
~ ;AIP0 4
----./
D) AI 3(P04h
E) AI 2(P0 4 h
6) Which one ofthe following is the correct formula for ammonium sulfide?
r-.;
A) (NH 4 hS04
(NH 4 hS
C) NH3S
D) NH 4 S0 3
E) N2S3
7) When calcium reacts with sulfur the compound formed is __ A) Ca2S3
B
as
C) CaS 2
D) Ca3S2 8) Chromium and chlorine form an ionic compound whose formula is CrCI 3. The name ofthis
compound is
A) chromium(lIl) trichloride
B) monochromium trichloride
E) chromium chlorine
9) The correct name for CCI 4 is _ A) carbon chlorate B) carbon chloride C) carbon perchlorate \.fW arbon tetrachloride
E) carbon tetra chlorate
10) The correct name for 50 is _
_.
r~
A) sulfite
B) sulfoxide
C) sulfate
o
sulfur monoxide
E) su lf ur oxide
11) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg (s) + O2 (g) -7 2MgO (s)
When 4.00 g of magnesium burns, the theoretical yield of magnesium oxide is _g.
A) 4.00
@ 6.63
C) 3.32
0) 13.3
E) 0.165
12) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg (s) + O2 (g) -7 2MgO (s)
How many moles of O2 are consumed when 0.770 mol of magnesium burns?
A) 0.0317
B) .385
C) 2.60
0) 0.770
E) 1.54
13) Lithium and nitrogen react in a combination reaction to produce lithium nitride:
6Li (s) + N2 (g) -7 2Li3N (s)
How many moles of lithium nitride are produced when 0.450 mol of lithium react in this
fashion?
A) 1.35
B) 0.0750
C) 0.900
E) 0.225
14) The formula weight of aluminum sulfate A1 2(50 4h is _ _amu.
A) 59.04
B) 123.04
C) 273 .06
0) 150.14
15) Calculate the percentage by mass of nitrogen in PtCl 2(NH 3h.
.A) .34
B) 12.67
C) 4.95
0) 4.67
:S42.14
E) 9.90
16) 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 conditions?
22
25
~ . 1 x 10
B) 3.4 X 10
C) 1.5 X 10 25 0) 4.7 X 10 22 E) 6.02 x 10 23
17) What is the empirical formula of a hydrocarbon that contains 89.94% C by mass?
A) CH 3
B) C9H 10
; Y3H4
0) CaH6
E) CgH
.
18) The combustion of propane (C3HS) in the presence of excess oxygen yields CO 2 and H 20:
C3 Hs (g) + 50 2 (g) -7 3C0 2 (g) + 4H 20 (g)
When 2 ~mol of O 2 are consumed in their reaction, _ _mol of CO2 are produced.
~
B) 2.5
C) 5.0
0) 6.0
E) 3.0
19) When the following equation is balanced, the coefficient of water is _ _
K (s) + H2 0 (I) -7 KOH (aq) + H2 (g)
®
B)l
C)5
0)3
E)4
-"''"'-:::7-",""",-,w:...;:eight of potassium phosphate K3 P0 4 is _ _ amu.
A) 212.27 "
B) 251.37
C) 196.27
0) 86.07
E) 173.17
~
21)
T~ cular weight of the acetic acid CH 3 C0 2H is _ _ amu .
~
B) 44
C) 48
0) 32
E) 94
22) The formula weig~ of magnesium fluoride (MgF2) is _ _ amu.
A) 92.9
~2.3
C) 67.6
0) 43.3
E) 86.6