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1) Of the following, which is most likely to form interstitial carbides?
A) active metals
B) transition metals
C) boron and silicon
D) alkaline earth metals
E) alkali metals
2) A common English set of units for expressing velocity is miles/hour. The SI unit for
velocity is ________.
A) km/hr
B) km/s
C) m/hr
D) m/s
E) cm/s
3) If an object is accelerating at a rate of 25 m/s2, how long (in seconds) will it take to
reach a speed of 550 m/s? (Assume an initial velocity of zero.)
A) 22
B) 1.4 X 104
C) 0.045
D) 1.2 X 104
E) 2.3 X 102
4) An atom of 13C contains ________ protons.
A) 6
B) 19
C) 7
D) 9
E) 13
5) The reaction of 50 mL of N2 gas with 150 mL of H2 gas to form ammonia via the
equation:
N2 (g) + 3H2 (g) → 2NH3 (g)
will produce ________ mL of ammonia if pressure and temperature are kept constant.
A) 250
B) 50
C) 200
D) 150
E) 100
6) Br2 can be prepared by combining NaBr with ________.
A) Cl2
B) HBr
C) HCl
D) NaCl
E) I2
7) The coordination number of cobalt in CoCl3 6NH3 is ________.
A) 2
B) 3
C) 4
D) 6
E) 8
8) The molecular formula of aspartame, the generic name of NutraSweet®, is
C14H18N2O5. The molar mass of aspartame, rounded to the nearest integer, is ________
g.
A) 24
B) 156
C) 294
D) 43
E) 39
9) Given the following reaction at equilibrium at 450.0 oC:
CaCO3 (s) CaO (s) + CO2 (g)
If pCO2 = 0.0155 atm, Kc = ________.
A) 155
B) 0.0821
C) 0.920
D) 2.61 x 10-4
E) 9.20
10) There are ________ mol of bromide ions in 0.500 L of a 0.350 M solution of AlBr3.
A) 0.150
B) 0.0500
C) 0.525
D) 0.167
E) 0.500
11) The correct name for CCl4 is ________.
A) carbon chloride
B) carbon tetrachlorate
C) carbon perchlorate
D) carbon tetrachloride
E) carbon chlorate
12) A sealed 1.0 L flask is charged with 0.500 mol of I2 and 0.500 mol of Br2. An
equilibrium reaction ensues:
I2 (g) + Br2 (g) 2IBr (g)
When the container contents achieve equilibrium, the flask contains 0.84 mol of IBr.
The value of Keq is ________.
A) 11
B) 4.0
C) 110
D) 6.1
E) 2.8
