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1) The reaction
4Al (s) + 3O2 → (g) 2Al2O3 (s)
ΔH° = -3351 kJ
is ________, and therefore heat is ________ by the reaction.
A) endothermic, released
B) endothermic, absorbed
C) exothermic, released
D) exothermic, absorbed
E) thermoneutral, neither released nor absorbed
2) The correct name for [Cu(NH3)4(H2O)2]2+ is ________.
A) diwaterquatraamminecopper (II)
B) tetraamminediaquacopper (II)
C) diaquatetraammoniumcopper (II)
D) tetraamminecopper (II) dihydrate
E) copper (II) tetraamminediaqueous
3) For the questions that follow, consider the BEST Lewis structures of the following
oxyanions:
In which of the ions do all X-O bonds (X indicates the central atom) have the same
length?
A) none
B) all
C) (i) and (ii)
D) (iii) and (v)
E) (iii), (iv), and (v)
4) What is the maximum number of double bonds that a carbon atom can form?
A) 4
B) 1
C) 0
D) 2
E) 3
5) Mixing 10.00 mL of an aqueous solution with 10.00 mL of water represents a
________.
A) crystallization
B) neutralization
C) twofold dilution
D) tenfold dilution
E) titration
6) During the formation of a coordination compound, the metal acts as a ________.
A) Lewis acid
B) Brnsted acid
C) Arrhenius acid
D) Brnsted base
E) Lewis base
7) Sulfur and oxygen react to produce sulfur trioxide. In a particular experiment, 7.9
grams of SO3 are produced by the reaction of 6.0 grams of O2 with 7.0 grams of S.
What is the % yield of SO3 in this experiment?
S (s) + O2 (g) → SO3 (g) (not balanced)
A) 48
B) 62
C) 73
D) 79
E) 92
8) The value of Keq for the following reaction is 0.25:
SO2 (g) + NO2 (g) SO3 (g) + NO (g)
The value of Keq at the same temperature for the reaction below is ________.
3SO2 (g) + 3NO2 (g) 3SO3 (g) + 3NO (g)
A) 1.6 x 10-2
B) 7.5 x 10-1
C) 8.3 x 10-2
D) 6.4 x 101
E) 0.25
9) Of the following substances, ________ is both a very strong acid and a powerful
oxidizing agent.
A) HNO3
B) H2SO4
C) HCl
D) H3PO4
E) HF
10) A fixed amount of gas at 25.0 °C occupies a volume of 8.66 L when the pressure is
629 torr. Use Charles's law to calculate the volume (L) the gas will occupy when the
temperature is increased to 112 °C while maintaining the pressure at 629 torr.
A) 9.26
B) 11.2
C) 1.93
D) 6.70
E) 38.8
11) Which pair of elements would you expect to exhibit the greatest similarity in their
physical and chemical properties?
A) O, S
B) C, N
C) K, Ca
D) H, He
E) Si, P
12) The SI unit for mass is ________.
A) kilogram
B) gram
C) pound
D) troy ounce
E) none of the above
13) The alkali metal that is used to treat manic-depressive illness is ________.
A) Na
B) K
C) Li
D) Rb
E) Cs
14) The ground state electron configuration of Ga is ________.
A) 1s22s23s23p64s23d104p1
B) 1s22s22p63s23p64s24d104p1
C) 1s22s22p63s23p64s23d104p1
D) 1s22s22p63s23p64s23d104d1
E) [Ar]4s23d11
15) The ligand with the formula Br€ is named ________ in complexes with transition
metals.
A) bromo
B) bromide
C) fluoro
D) carbonato
E) azido
16) Ka for HCN is 4.9 x 10-10. What is the pH of a 0.068 M aqueous solution of sodium
cyanide?
A) 0.74
B) 2.96
C) 11.07
D) 13.24
E) 7.00
17) Which pair of atoms constitutes a pair of isotopes of the same element?
A) X X
B) X X
C) X X
D) X X
E) X X
18) Which of the subshells below do not exist due to the constraints upon the angular
momentum quantum number?
A) 2d
B) 2s
C) 2p
D) all of the above
E) none of the above
19) Replacement of CaO by PbO in soda-lime glass results in ________.
A) denser glass with a higher refractive index
B) glass with a deep blue color
C) opaque glass
D) a softer glass with a lower melting point
E) a harder glass with a higher melting point
