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1) The volume of an ideal gas is zero at ________.
A) 0 °C
B) -45 °F
C) -273 K
D) -363 K
E) -273 °C
2) For an isothermal process, the entropy change of the surroundings is given by the
equation:
A) S = qsys T
B) S = -qsys T
C) S = q lnT
D) S = -q lnT
E) S = -qsys / T
3) The active site of nitrogenase is a cofactor that contains two transition metals. These
transition metals are ________.
A) Cr and Mg
B) Mn and V
C) Os and Ir
D) Fe and Zn
E) Fe and Mo
4) Ru+ ions are represented by the electron configuration ________.
A) [Kr]5s14d6
B) [Kr]5s24d5
C) [Kr]5s24d7
D) [Kr]4d5
E) [Ar]4s13d6
5) Of the following elements, ________ is the only one that cannot be found in nature
in its elemental form.
Cu
Hg
Au
Ag
Na
A) Cu
B) Hg
C) Au
D) Ag
E) Na
6) What is the missing product from this reaction?
Tl --> _____ + e
A) Pb
B) Hg
C) Tl
D) Tl
E) Tl
7) A small amount of salt dissolved in water is an example of a ________.
A) homogeneous mixture
B) heterogeneous mixture
C) compound
D) pure substance
E) solid
8) The Keq for the equilibrium below is 0.112 at 700.0 oC.
SO2 (g) + O2 (g) SO3 (g)
What is the value of Keq at this temperature for the following reaction?
2SO2 (g) + O2 (g) 2SO3 (g)
A) 1.25 x 10-2
B) 2.24 x 10-1
C) 7.97 x 101
D) 4.46
E) 0.112
9) Bond enthalpy is ________.
A) always positive
B) always negative
C) sometimes positive, sometimes negative
D) always zero
E) unpredictable
10) A buffer solution with a pH of 4.31 is prepared with 1.0 M HC2H3O2 and ________
M NaC2H3O2. The Ka of HC2H3O2 is 1.8 x 10-5.
A) 0.37
B) 0.74
C) 4.2 x 10-6
D) 8.8 x 10-10
E) 0.18
11) The hybridization of the carbon atom in carbon dioxide is ________.
A) sp
B) sp2
C) sp3
D) sp3d
E) sp3d2
12) The pH of a solution prepared by mixing 45.0 mL of 0.183 M KOH and 35.0 mL of
0.145 M HCl is ________.
A) 1.314
B) 1.403
C) 0.00824
D) 12.597
E) 12.923
