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1) Which one of the following is an incorrect orbital notation?
A) 2s
B) 3py
C) 3f
D) 4dxy
E) 4s
2) The electron configuration of a ground-state Ag atom is ________.
A) [Ar]4s24d9
B) [Kr]5s14d10
C) [Kr]5s23d9
D) [Ar]4s14d10
E) [Kr]5s24d10
3) When the electron in a hydrogen atom moves from n = 8 to n = 2 light with a
wavelength of ________ nm is emitted.
A) 657
B) 93.8
C) 411
D) 487
E) 389
4) How many grams of calcium cyanide (Ca(CN)2) are contained in 0.69 mol of
calcium cyanide?
A) 61
B) 0.0078
C) 1.2 x 10-24
D) 4.2 x 1023
E) 88
5) Electrons in the 1s subshell are much closer to the nucleus in Ar than in He due to the
larger ________ in Ar.
A) nuclear charge
B) paramagnetism
C) diamagnetism
D) Hund's rule
E) azimuthal quantum number
6) Which one of the following pairs cannot be mixed together to form a buffer solution?
A) HONH2, HONH3Cl
B) NaCl, HCl
C) RbOH, HF
D) KOH, HNO2
E) H2SO3, KHSO3
7) A sample of H2 gas (2.0 L) at 3.5 atm was combined with 1.5 L of N2 gas at 2.6 atm
pressure at a constant temperature of 25 °C into a 7.0 L flask. The total pressure in the
flask is ________ atm. Assume the initial pressure in the flask was 0.00 atm and the
temperature upon mixing was 25 °C.
A) 0.56
B) 2.8
C) 1.0
D) 1.6
E) 24
8) The density of HCN is ________ g/L at STP.
A) 1.21
B) 329
C) 605
D) 0.829
E) 2.21
9) The pH of an aqueous solution at 25.0 oC is 10.55. What is the molarity of H+ in this
solution?
A) 2.8 x 10-11
B) 3.5 x 10-4
C) 3.45
D) 1.1 x 10-13
E) 3.5 x 1010
10) Thermodynamic Quantities for Selected Substances at 298.15 K (25 oC)
The value of H o for the formation of calcium chloride from its constituent elements,
Ca (s) + Cl2 (g) --> CaCl2 (s)
is ________ kJ/mol.
A) 0.00
B) -397.9
C) +397.9
D) -795.8
E) +795.8
11) Which compound listed below has the greatest molar solubility in water?
A) CdCO3
B) Cd(OH)2
C) AgI
D) CaF2
E) ZnCO3
12) How many ligands are there in the coordination sphere of [Co(en)2Cl2]+?
A) 3
B) 6
C) 4
D) 1
E) 0
13) One edge of a cube is measured and found to be 13 cm. The volume of the cube in
m3 is ________.
A) 2.2 X 10-3
B) 2.2 X 10-6
C) 2.2
D) 2.2 X 103
E) 2.2 X 106
14) Human blood is ________.
A) neutral
B) very basic
C) slightly acidic
D) very acidic
E) slightly basic
15) Calcium oxide reacts with water in a combination reaction to produce calcium
hydroxide:
CaO (s) + H2O (l) → Ca(OH)2 (s)
A 3.50-g sample of CaO is reacted with 3.38 g of H2O. How many grams of water
remain after completion of reaction?
A) 0.00
B) 0.00694
C) 2.25
D) 1.04
E) 0.125
16) At maximum, an d-subshell can hold ________ electrons.
A) 10
B) 6
C) 2
D) 8
E) 14
17) What is the pH of a buffer solution that is 0.172 M in hypochlorous acid (HClO)
and 0.131 M in sodium hypochlorite? The Ka of hypochlorous acid is 3.8 x 10-8.
A) 14.12
B) 6.70
C) 9.07
D) 7.54
E) 7.30
18) The combustion of propane (C3H8) in the presence of excess oxygen yields CO2
and H2O:
C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)
When 7.3 g of C3H8 burns in the presence of excess O2, ________ g of CO2 is
produced.
19) Which noble gas has the highest first ionization energy?
20) In the valence shell of an atom there are six electron domains. They will be
arranged in a(n) ________ geometry.
21) Predict the product of the catalytic hydrogenation of 6-ethyl-3-decene.
22) Stable nuclei with low atomic numbers, up to 20, have a neutron to proton ratio of
appro x imately ________.
23) A certain alcohol contains only three elements, carbon, hydrogen, and oxygen.
Combustion of a 60.00 gram sample of the alcohol produced 114.6 grams of CO2 and
70.44 grams of H2O. What is the empirical formula of the alcohol?
24) The rms speed of methane molecules at 45.0 °C is ________ m/sec.
