1) The kinetic energy of a 23.2-g object moving at a speed of 81.9 km/hr is ________
kcal.
A) 1.43 x 10-3
B) 6.00
C) 1900
D) 454
E) 0.0251
2) 1 kilogram = ________ milligrams
A) 1 X 10-6
B) 1,000
C) 10,000
D) 1,000,000
E) none of the above
3) On a phase diagram, the critical temperature is ________.
A) the temperature below which a gas cannot be liquefied
B) the temperature above which a gas cannot be liquefied
C) the temperature at which all three states are in equilibrium
D) the temperature required to melt a solid
E) the temperature required to cause sublimation of a solid
4) A vessel containing Ne(g) and Ar(g) has a total pressure of 9.78. If the partial
pressure of the Neon (PNe) is 3.78 and the partial pressure of the Argon (PAr) is 6, then
the mole-fraction of Ne(g) is _______ and the mole-fraction of Ar(g) is ________.
A) 0.39, 0.61
B) 0.61, 0.39
C) 37, 58.7
D) 0.63, 1.59
E) 2.59, 1.63
5) The wavelength of light emitted from a traffic light having a frequency of 2.74 X
1014 Hz is ________ nm.
A) 1090
B) 109
C) 54.7
D) 36.5
E) 50.0
6) What is the oxidation number of cobalt in [Co(NH3)4F2]?
A) -3
B) +2
C) +1
D) +3
E) +6
7) What is the metal ion in the porphyrin of heme?
A) iron
B) calcium
C) molybdenum
D) magnesium
E) chlorophyll
8) In the troposphere, temperature ________ with increasing altitude, while in the
stratosphere, temperature ________ with increasing altitude.
A) increases, increases
B) decreases, decreases
C) increases, decreases
D) decreases, increases
E) decreases, remains constant
9) Gasoline and water do not mix because gasoline is ________.
A) less dense than water
B) less viscous than water
C) nonpolar and water is polar
D) volatile and water is not
E) polar and water is nonpolar
10) When a system is at equilibrium, ________.
A) the reverse process is spontaneous but the forward process is not
B) the forward and the reverse processes are both spontaneous
C) the forward process is spontaneous but the reverse process is not
D) the process is not spontaneous in either direction
E) both forward and reverse processes have stopped
11) How much faster does 235UF6 effuse than 238UF6?
A) 1.013 times as fast
B) 1.009 times as fast
C) 1.004 times as fast
D) 1.006 times as fast
E) 1.018 times as fast
12) Which of the following could be added to a solution of sodium acetate to produce a
buffer?
A) acetic acid only
B) acetic acid or hydrochloric acid
C) hydrochloric acid only
D) potassium acetate only
E) sodium chloride or potassium acetate