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1) Which species has 18 electrons?
A) 39K
B) 32S2-
C) 35Cl
D) 27Al3+
E) 64Cu2+
2) The value of G o at 261.0 oC for the formation of phosphorous trichloride from its
constituent elements,
P2 (g) + 3Cl2 (g) --> 2PCl3 (g)
is ________ kJ/mol. At 25.0 oC for this reaction, H o is -720.5 kJ/mol, G o is -642.9
kJ/mol, and S o is -263.7 J/K.
A) -579.6
B) 6.81 x 104
C) 1.40 x 105
D) -651.7
E) -861.4
3) The missing product from this reaction is ________.
I --> Te + _____
A) He
B) e
C) n
D) e
E)
4) Given the data in the table below, ΔH°rxn for the reaction
Ag2O (s) + H2S (g) → Ag2S (s) + H2O (l)
is ________ kJ.
A) -267
B) -370
C) -202
D) -308
E) More data are needed to complete the calculation.
5) The general formula of an aldehyde is ________.
A)
B)
C)
D)
E)
6) At 24o C, Kp = 0.080 for the equilibrium:
NH4HS (s) NH3(g) + H2S (g)
A sample of solid NH4HS is placed in a closed vessel and allowed to equilibrate.
Calculate the equilibrium partial pressure (atm) of ammonia, assuming that some solid
NH4HS remains.
A) 0.28
B) 0.080
C) 0.052
D) 0.0049
E) 3.8
7) What is the oxidation state of xenon in XeO4?
A) +8
B) +6
C) +4
D) +2
E) 0
8) The ground-state configuration of tungsten is ________.
A) [Ar]4s23d3
B) [Xe]6s24f145d4
C) [Ne]3s1
D) [Xe]6s24f7
E) [Kr]5s24d105p5
9) The compound responsible for the characteristic smell of garlic is allicin, C6H10OS2.
The mass of 1.00 mol of allicin, rounded to the nearest integer, is ________ g.
A) 34
B) 162
C) 86
D) 61
E) 19
10) Of the following substances, an aqueous solution of ________ will form basic
solutions.
NaHS
Cu(NO3)2
KHCO3
NaF
A) NaHS, Cu(NO3)2
B) KHCO3, NaHS
C) NaF only
D) NaF, KHCO3
E) NaHS, KHCO3 and NaF
