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1) The bond angle marked a in the following molecule is about ________.
A) 109.5
B) 60
C) 180
D) 120
E) 90
2) For a given reaction, H = +74.6 kJ/mol, and the reaction is spontaneous at
temperatures above the crossover temperature, 449 K. The value of S = ________
J/mol · K, assuming that H and S do not vary with temperature.
A) 166
B) 6020
C) -166
D) -6020
E) 3.35 x 104
3) ________ and ________ reside in the atomic nucleus.
A) Protons, electrons
B) Electrons, neutrons
C) Protons, neutrons
D) Neutrons, only neutrons
E) none of the above
4) Of the following, ________ appear(s) to gain mass in a magnetic field.
A) O2 only
B) N2 only
C) B2 and N2
D) N2 and O2
E) B2 and O2
5) A sample of a gas (1.50 mol) is contained in a 15.0 L cylinder. The temperature is
increased from 100 °C to 150 °C. The ratio of final pressure to initial pressure [ ] is
________.
A) 1.50
B) 0.667
C) 0.882
D) 1.13
E) 1.00
6) The 3p subshell in the ground state of atomic xenon contains ________ electrons.
A) 2
B) 6
C) 8
D) 10
E) 36
7) Which of the following elements has a ground-state electron configuration different
from the predicted one?
A) Cu
B) Ca
C) Xe
D) Cl
E) Ti
8) The majority of SO2 released annually in the United States results from ________.
A) combustion of oil
B) acid rain
C) combustion of coal
D) depletion of ozone by CFCs
E) all of the above
9) A reaction was found to be zero order in A. Increasing the concentration of A by a
factor of 3 will cause the reaction rate to ________.
A) remain constant
B) increase by a factor of 27
C) increase by a factor of 9
D) triple
E) decrease by a factor of the cube root of 3
10) When a bromine atom forms the bromide ion, it has the same charge as the
________ ion.
A) sulfide
B) ammonium
C) nitrate
D) phosphate
E) sulfite
11) During the formation of a coordination compound, ligands act as ________.
A) Lewis bases
B) Arrhenius bases
C) Brnsted bases
D) Lewis acids
E) Arrhenius acids
12) The hybridization of orbitals on the central atom in a molecule is sp2. The
electron-domain geometry about this central atom is ________.
A) octahedral
B) linear
C) trigonal planar
D) trigonal bipyramidal
E) tetrahedral
