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1) A 5-ounce cup of raspberry yogurt contains 6.0 g of protein, 2.0 g of fat, and 16.3 g
of carbohydrate. The fuel values for protein, fat, and carbohydrate are 17, 38, and 17
kJ/g, respectively. The fuel value of this cup of yogurt is ________ kJ.
A) 460
B) 520
C) 280
D) 720
E) 72
2) The value of G o for a reaction conducted at 25 oC is 3.05 kJ/mol. The equilibrium
constant for a reaction is ________ at this temperature.
A) 0.292
B) -4.20
C) 0.320
D) -1.13
E) More information is needed.
3) ________ could be the formula of an alkene.
A) C3H8
B) C3H6
C) C6H6
D) C17H36
E) CH8
4) A Brnsted-Lowry base is defined as a substance that ________.
A) increases [H+] when placed in H2O
B) decreases [H+] when placed in H2O
C) increases [OH-] when placed in H2O
D) acts as a proton acceptor
E) acts as a proton donor
5) Which equation correctly represents the electron affinity of calcium?
A) Ca (g) + e- → Ca- (g)
B) Ca (g) → Ca+ (g) + e-
C) Ca (g) → Ca- (g) + e-
D) Ca- (g) → Ca (g) + e-
E) Ca+ (g) + e- → Ca (g)
6) What is a phosphor?
A) an o x ide of phosphorus
B) a substance that thermally reduces to phosphorus
C) a bioluminescent substance
D) a substance that emits light when e x cited by radiation
E) an alkali metal phosphide
7) Which produces the greatest number of ions when one mole dissolves in water?
A) K2SO4
B) NaF
C) LiMnO4
D) NH4Br
E) sucrose
8) At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and
oxygen:
2N2O5(g) --> 4NO2 (g) + O2 (g)
When the rate of formation of NO2 is 5.5 x 10-4 M/s, the rate of decomposition of N2O5
is ________ M/s.
A) 2.2 x 10-3
B) 1.4 x 10-4
C) 10.1 x 10-4
D) 2.8 x 10-4
E) 5.5 x 10-4
9) The rate constant of a first-order process that has a half-life of 462 s is ________ s-1.
A) 1.50 x 10-3
B) 3.20 x 102
C) 6.67 x 102
D) -1.08 x 10-3
E) 2.16 x 10-3
10) Calculate the pH of a solution prepared by dissolving 0.150 mol of benzoic acid and
0.300 mol of sodium benzoate in water sufficient to yield 1.00 L of solution. The Ka of
benzoic acid is 6.30 x 10-5.
A) 2.516
B) 3.892
C) 4.502
D) 10.158
E) 4.195
11) The value of ΔH° for the reaction below is +128.1 kJ:
CH3OH (l) → CO (g) + 2H2 (g)
How many kJ of heat are consumed when 5.75 g of CO (g) is formed as shown in the
equation?
A) 23.3 kJ
B) 62.0 kJ
C) 26.3 kJ
D) 162 kJ
E) 8.3 kJ
12) Components of Air Mole Fraction
Nitrogen 0.781
Oxygen 0.209
Argon 0.010
What is the partial pressure or oxygen (in torr) in the atmosphere when the atmospheric
pressure is 755.0 torr?
A) 158
B) 590.
C) 611
D) 7.55
E) 760
13) What is the de Broglie wavelength (m) of a 25-g object moving at a speed of 5.0
m/s?
A) 1.9 X 1032 m
B) 5.3 X 10-33 m
C) 6.6 X 10-36 m
D) 3.32 X 10-36 m
E) 3.02 X 1045 m
14) Using the VSEPR model, the molecular geometry of the central atom in KrF2 is
________.
A) linear
B) trigonal planar
C) tetrahedral
D) bent
E) trigonal pyramidal
15) The name of the binary compound N2O4 is ________.
A) nitrogen oxide
B) nitrous oxide
C) nitrogen (IV) oxide
D) dinitrogen tetroxide
E) oxygen nitride
