1) Of the following atoms, which has the largest first ionization energy?
A) K
B) Rb
C) Sr
D) Ca
E) Ba
2) For the reaction
2 C4H10 (g) + 13 O2 (g) –> 8 CO2 (g) + 10 H2O (g)
H o is -125 kJ/mol and S o is +253 J/K mol. This reaction is ________.
A) spontaneous at all temperatures
B) spontaneous only at high temperature
C) spontaneous only at low temperature
D) nonspontaneous at all temperatures
E) unable to determine without more information
3) What is the general formula for an aldehyde?
A)
B)
C)
D)
E)
4) The temperature of a 24.3 g sample of gold increases from 23.7 °C to 31.5 °C. If the
specific heat of gold is 0.129 J/g-K, how many joules of heat are absorbed?
A) 24.5 J
B) 0.0414 J
C) -24.5 J
D) 0.293 J
E) 1.01 J
5) What is the conjugate acid of NH3?
A) NH3
B) NH2
+
C) NH3
+
D) NH4
+
E) NH4OH
6) A solution is prepared by adding 1.50 g of solid NaCl to 50.0 mL of 0.100 M CaCl2.
What is the molarity of chloride ion in the final solution? Assume that the volume of the
final solution is 50.0 mL.
A) 0.713
B) 0.613
C) 0.130
D) 0.230
E) 0.513
7) Of the reactions involved in the photodecomposition of ozone (shown below), which
are photochemical?
1. O2 (g) + h½ –> O (g) + O (g)
2. O (g) + O2(g) + M (g) –> O3(g) + M* (g)
3. O3 (g) + h½ –> O2(g) + O (g)
4. O (g) + O (g) + M (g) –> O2(g) + M* (g)
A) 2 and 4
B) 1, 2, and 4
C) 1 and 3
D) 1 only
E) all of them
8) Which of the following correctly represents the transmutation in which
neptunium-239 is produced via bombardment of uranium-238 with a neutron?
A) U( n, e) Np
B) U( n, p) Np
C) U( n, ³) Np
D) U( n, ±) Np
E) U( n, n) Np
9) Vertical columns of the periodic table are known as ________.
A) metals
B) periods
C) nonmetals
D) groups
E) metalloids
10) If the rate law for the reaction
2A + 3B –> products
is second order in A and first order in B, then the rate law is rate = ________.
A) k[A][B]
B) k[A]2[B]3
C) k[A][B]2
D) k[A]2[B]
E) k[A]2[B]2
11) How many isomers are possible for C4H10?
A) 1
B) 2
C) 3
D) 4
E) 10
12) A reaction was found to be second order in carbon monoxide concentration. The
rate of the reaction ________ if the [CO] is doubled, with everything else kept the
same.
A) doubles
B) remains unchanged
C) triples
D) increases by a factor of 4
E) is reduced by a factor of 2
13) A 31.5 mL aliquot of HNO3 (aq) of unknown concentration was titrated with 0.0134
M NaOH (aq). It took 23.9 mL of the base to reach the endpoint of the titration. The
concentration (M) of the acid was ________.
A) 0.0102
B) 0.0051
C) 0.0204
D) 0.227
E) 1.02
14) The name of the ionic compound V2O3 is ________.
A) vanadium (III) oxide
B) vanadium oxide
C) vanadium (II) oxide
D) vanadium (III) trioxide
E) divanadium trioxide