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1) What volume (mL) of 142 M phosphoric acid can be neutralized with 0.367 mL of
0.0824 M sodium hydroxide?
A) 211
B) 12.9
C) 1900
D) 632
E) 1570
2) Why does ozone not form in high concentrations in the atmosphere above 50 km?
A) Insufficient oxygen is available.
B) Insufficient molecules exist for removal of excess energy from ozone upon its
formation.
C) Light of the required wavelength is not available at those altitudes.
D) Atomic oxygen concentration is too low at high altitudes.
E) The pressure is too high.
3) The half-life of 218Po is 3.1 minutes. How much of a 170 gram sample remains after
0.64 hours?
A) 0.032 g
B) 150 g
C) 31 g
D) 4.7 x 10-10g
E) None of the original sample will remain.
4) For a given reaction with S = -50.8 J/K-mol, the G = 0 at 395 K. The value of H
must be
________ kJ/mol, assuming that H and S do not vary with temperature.
A) -20.1
B) 20.1
C) -1.29 x 10-4
D) 1.29 x 10-4
E) -7.78 x 10-3
5) The charge on an electron was determined in the ________.
A) cathode ray tube, by J. J. Thomson
B) Rutherford gold foil experiment
C) Millikan oil drop experiment
D) Dalton atomic theory
E) atomic theory of matter
6) In the following reaction, Ni2+ is acting as a(n) ________.
Ni2+ (g) + 6H2O (l) Ni(H2O)6
2+ (aq)
A) oxidizing agent
B) Lewis acid
C) precipitating agent
D) solvent
E) ligand
7) The principal quantum number of the electrons that are lost when iron forms a cation
is ________.
A) 4
B) 5
C) 6
D) 2
E) 1
8) The highest energy occupied molecular orbital in the F-F bond of the F2 molecule is
_____.
A) π*
2s
B) π2s
C) σ*
1p
D) π*
2p
E) π2p
9) When the following equation is balanced, the coefficient of nitric acid is ________.
N2O5 (g) + H2O (l) → HNO3 (aq)
A) 5
B) 2
C) 3
D) 4
E) 1
10) Of the following, ________ cannot accommodate more than an octet of electrons.
A) Ni
B) Sc
C) Be
D) Os
E) Sb
11) Of the following, all are valid units for a reaction rate except ________.
A) mol/L
B) M/s
C) mol/hr
D) g/s
E) mol/L-hr
12) The magnitudes of Kf and of Kb depend on the identity of the ________.
A) solute
B) solvent
C) solution
D) solvent and on temperature
E) solute and solvent
13) The electron-domain geometry of a boron-centered compound BH3 is trigonal
planar. The hybridization of the central boron atom is ________.
A) sp2
B) sp3d2
C) sp3
D) sp3d
E) sp
14) A solution contains 33% phosphoric acid by mass. This means that ________.
A) 100 g of this solution contains 33 g of phosphoric acid
B) 1 mL of this solution contains 33 g of phosphoric acid
C) 1 L of this solution has a mass of 33 g
D) 1 L of this solution contains 33 mL of phosphoric acid
E) the density of this solution is 3.3 g/mL
15) What is the name of the compound below?
A) 2,4-methylbutene
B) 2,5-dimethylpentane
C) 2,4-ethylbutene
D) 2,4-dimethyl-1-pentene
E) 2,4-dimethyl-4-pentene
