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1) The oxidation state of sulfur in the SO3 molecule is ________.
A) +6
B) +2
C) -2
D) +4
E) 0
2) Dinitrogentetraoxide partially decomposes according to the following equilibrium:
N2O4 (g) 2 NO2 (g)
A 1.00-L flask is charged with ofN2O4. At equilibrium at 373 K, 0.0055 mol
of N2O4 remains. Keq for this reaction is ________.
A) 2.2 x 10-4
B) 13
C) 0.22
D) 0.022
E) 0.87
3) Dynamite ________.
A) was invented by Alfred Nobel
B) is made of nitroglycerine and an absorbent such as diatomaceous earth
C) is a much safer explosive than pure nitroglycerine
D) is an explosive
E) all of the above
4) The first noble gas to be incorporated into a compound was ________.
A) Ar
B) Kr
C) He
D) Ne
E) Xe
5) How many chiral carbon atoms does the neopentane (2, 2 - dimethylpropane) have?
A) 0
B) 1
C) 2
D) 3
E) 4
6) At 200 oC, the equilibrium constant (Kp) for the reaction below is 2.40 x 103.
2NO (g) N2 (g) + O2 (g)
A closed vessel is charged with 36.1 atm of NO. At equilibrium, the partial pressure of
O2 is ________ atm.
A) 294
B) 35.7
C) 17.9
D) 6.00
E) 1.50 x 10-2
7) What is the wavelength of light (nm) that has a frequency of 6.44 X 1013 s-1?
A) 4660 nm
B) 6490 nm
C) 4.66 X 10-8 nm
D) 6.49 X 10-8 nm
E) 932 nm
8) In the symbol shown below, x = ________.
C
A) 7
B) 13
C) 12
D) 6
E) not enough information to determine
9) The electron configuration of the P3- ion is ________.
A) [Ar]3s23p6
B) [Ar]3s23p2
C) [Ne]3s23p6
D) [Ne]3s23p2
E) [Kr]3s22p6
10) Of the compounds below, ________ has the smallest ionic separation.
A) KF
B) K2S
C) RbCl
D) SrBr2
E) RbF
11) In which of the following reactions would increasing pressure at constant
temperature not change the concentrations of reactants and products, based on Le Ch
¢telier's principle?
A) N2 (g) + 3H2 (g) 2NH3 (g)
B) N2O4 (g) 2NO2 (g)
C) N2 (g) + 2O2 (g) 2NO2 (g)
D) 2N2 (g) + O2 (g) 2N2O (g)
E) N2 (g) + O2 (g) 2NO (g)
