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1) There is/are ________σ bond(s) in the molecule below.
A) 1
B) 2
C) 12
D) 13
E) 18
2) The halogens, alkali metals, and alkaline earth metals have ________ valence
electrons, respectively.
A) 7, 4, and 6
B) 1, 5, and 7
C) 8, 2, and 3
D) 7, 1, and 2
E) 2, 7, and 4
3) Acceleration due to gravity of a free-falling object is 9.8 m/s2. Express this in
millimeters/millisecond2.
A) 9.8 X 10-9
B) 9.8 X 103
C) 9.8 X 10-6
D) 9.8 X 106
E) 9.8 X 10-3
4) The molecular geometry of the PHCl2 molecule is ________.
A) bent
B) trigonal planar
C) trigonal pyramidal
D) tetrahedral
E) T-shaped
5) Sodium hydride reacts with excess water to produce aqueous sodium hydroxide and
hydrogen gas:
NaH (s) + H2O (l) → NaOH (aq) + H2 (g)
A sample of NaH weighing ________ g will produce 982 mL of gas at 28.0 °C and 765
torr, when the hydrogen is collected over water. The vapor pressure of water at this
temperature is 28 torr.
A) 2.93
B) 0.960
C) 0.925
D) 0.0388
E) 925
6) What is the mass % of oxygen in lead (II) nitrate (Pb(NO3)2) rounded to three
significant figures?
A) 4.83
B) 19.3
C) 29.0
D) 14.5
E) 0.331
7) In general, as activation energy increases, reaction rate ________.
A) goes down if the reaction is exothermic
B) goes down if the reaction is endothermic
C) stays the same regardless of whether the reaction is exothermic or endothermic
D) goes down regardless of whether the reaction is exothermic or endothermic
E) none of the above
8) Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride:
S (s) + 3F2 (g) → SF6 (g)
In a particular experiment, the percent yield is 79.0%. This means that in this
experiment, a 7.90-g sample of fluorine yields ________ g of SF6.
A) 30.3
B) 10.1
C) 7.99
D) 24.0
E) 0.110
9) Which one of the following compounds is chromium(III) oxide?
A) Cr2O3
B) CrO3
C) Cr3O2
D) Cr3O
E) Cr2O4
10) Thermodynamic Quantities for Selected Substances at 298.15 K (25 oC)
The value of G o at 25 oC for the oxidation of solid elemental sulfur to gaseous sulfur
trioxide,
2S (s, rhombic) + 3O2 (g) --> 2SO3 (g)
is ________ kJ/mol.
A) +740.8
B) -370.4
C) +370.4
D) -740.8
E) +185.2
11) Using the following abbreviated spectrochemical series, determine which complex
ion is most likely to absorb light in the red region of the visible spectrum.
small splitting Cl- < H2O < NH3 < CN- large splitting
A) [CuCl4]2-
B) [Cu(H2O)4]2+
C) [Cu(NH3)4]2+
D) [Cu(CN)4]2-
E) not enough information given to determine
12) ________ is credited with developing the concept of atomic numbers.
A) Dmitri Mendeleev
B) Lothar Meyer
C) Henry Moseley
D) Ernest Rutherford
E) Michael Faraday
13) Which one of the following is an incorrect subshell notation?
A) 4f
B) 2d
C) 3s
D) 2p
E) 3d
