1) Which one of the following is not an intensive property?
A) density
B) temperature
C) melting point
D) mass
E) boiling point
2) The carbon-carbon σ bond in ethylene, , results from the overlap of
________.
A) sp hybrid orbitals
B) sp3 hybrid orbitals
C) sp2 hybrid orbitals
D) s atomic orbitals
E) p atomic orbitals
3) What is emitted in the nuclear transmutation, Al(n, ?) Na?
A) an alpha particle
B) a beta particle
C) a neutron
D) a proton
E) a gamma photon
4) The formal charge on sulfur in SO4
2- is ________, where the Lewis structure of the
ion is:
A) -2
B) 0
C) +2
D) +4
E) -4
5) Isomers whose ligands can bind directly to a metal or be outside the lattice are called
________.
A) linkage isomers
B) rotational isomers
C) coordination sphere isomers
D) geometric isomers
E) optical isomers
6) The rate of disappearance of HBr in the gas phase reaction
2HBr (g) –> H2 (g) + Br2 (g)
is 0.140 M s-1 at 150 oC. The rate of reaction is ________ M s-1.
A) 3.57
B) 0.0700
C) 0.0196
D) 0.280
E) 0.0860
7) Thermodynamic Quantities for Selected Substances at 298.15 K (25 oC)
The combustion of ethene in the presence of excess oxygen yields carbon dioxide and
water:
C2H4 (g) + 3O2 (g) –> 2CO2 (g) + 2H2O (l)
The value of S o for this reaction is ________ J/K mol.
A) -267.4
B) -140.9
C) -347.6
D) +347.6
E) +140.9
8) The mass of nitrogen dioxide contained in a 4.32 L vessel at 48 °C and 141600 Pa is
________ g.
A) 5.35 x 104
B) 53.5
C) 10.5
D) 70.5
E) 9.46 x 10-2
9) Which is the correct Ksp expression for PbCl2 (s) dissolving in water?
A) Ksp = [Pb2+] [Cl€]2
B) Ksp = [Pb2+] [Cl€]
C) Ksp = [Pb2+]2 [Cl€]
D) Ksp = [PbCl+] [Cl€]
E) Ksp = [Pb+] [Cl2€]2
10) Classify the following compounds as weak acids (W) or strong acids (S):
hydrocyanic acid
hydrofluoric acid
phenol
A) W W W
B) S S S
C) S W W
D) W S S
E) W S W
11) The value of ΔH° for the following reaction is 177.8 kJ. The value of H°f for
CaO(s) is ________ kJ/mol.
CaCO3 (s) → CaO (s) + CO2 (g)
A) -1600
B) -813.4
C) -635.5
D) 813.4
E) 177.8
12) Which one of the following solutes has a limiting van’t Hoff factor (i) of 3 when
dissolved in water?
A) KNO3
B) CH3OH
C) CCl4
D) Na2SO4
E) sucrose
13) Ca reacts with element X to form an ionic compound with the formula CaX. Al will
react with X to form ________.
A) AlX2
B) AlX
C) Al2X3
D) Al3X2
E) Al3X
14) With which of the following will the Potassium ion form an insoluble salt?
A) Phosphate
B) Sulfate
C) Sulfide
D) Iodide
E) Potassium will form soluble salts with all choices.
15) The element X has three naturally occurring isotopes. The isotopic masses (amu)
and % abundances of the isotopes are given in the table below. The average atomic
mass of the element is ________ amu.
A) 161.75
B) 162.03
C) 162.35
D) 163.15
E) 33.33
16) Why does fluoride treatment render teeth more resistant to decay?
A) Fluoride kills the bacteria in the mouth that make the acids that decay teeth.
B) Fluoride stimulates production of tooth enamel to replace that lost to decay.
C) Fluoride reduces saliva production, keeping teeth drier and thus reducing decay.
D) Fluoride converts hydroxyapatite to fluoroapatite that is less reactive with acids.
E) Fluoride dissolves plaque, reducing its decaying contact with teeth.
17) Consider the reaction:
FeO (s) + Fe (s) + O2 (g) –> Fe2O3 (s)
Given the following table of thermodynamic data,
determine the temperature (in oC) above which the reaction is nonspontaneous.
A) This reaction is spontaneous at all temperatures.
B) 618.1
C) 756.3
D) 2438
E) 1235
18) High speed electrons emitted by an unstable nucleus are called ________.
19) Si is the symbol for the element ________.
20) What is the concentration (M) of a NaCl solution prepared by dissolving 3.8 g of
NaCl in sufficient water to give 245 mL of solution?
21) ________ discovered radioactivity.
22) The secondary valence in metal ion complexes is called the ________.
23) In DNA, adenine is always paired with ________.
24) When electrons are removed from a lithium atom, they are removed first from
which orbital?
25) How many moles of Co2+ are present in 0.300 L of a 0.500 M solution of CoI2?
26) The danger from mixing ammonia with bleach is the production of ________.