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1) The de Broglie wavelength of a 84.32 gram bullet traveling at the speed of 308.6 m/s
is ________ m.
A) 2.546 X 10-35
B) 2.546 X 10-36
C) 2.546 X 10-37
D) 2.546 X 10-38
E) 1.724 X 10-32
2) Using the table of bond dissociation energies, the H for the following reaction is
________ kJ.
2HCl (g) + F2 (g) → 2HF (g) + Cl2 (g)
A) -359
B) -223
C) 359
D) 223
E) 208
3) Based on molecular orbital theory, the bond order of the N-N- bond in the N2
-
molecule is ________.
A) 2 1/2
B) 1
C) 1/2
D) 2
E) 3
4) The concentration of S2O8
2- remaining at 1600 s is ________ M.
A) 0.036
B) 0.014
C) 0.043
D) 0.064
E) 0.029
5) Predict the empirical formula of the ionic compound that forms from magnesium and
fluorine.
A) Mg2F3
B) MgF
C) Mg2F
D) Mg3F2
E) MgF2
6) Given the following reactions
2S (s) + 3O2 (g) → 2SO3 (g) ΔH = -790 kJ
S (s) + O2 (g) → SO2 (g) ΔH = -297 kJ
the enthalpy of the reaction in which sulfur dioxide is oxidized to sulfur trioxide
2SO2 (g) + O2 (g) → 2SO3 (g)
is ________ kJ.
A) 196
B) -196
C) 1087
D) -1384
E) -543
7) Of the halogens, which are gases at room temperature and atmospheric pressure?
A) fluorine, bromine, and iodine
B) fluorine, chlorine, and bromine
C) fluorine, chlorine, bromine, and iodine
D) fluorine, chlorine, and iodine
E) fluorine and chlorine
8) Radium undergoes alpha decay. The product of this reaction also undergoes alpha
decay. What is the product of this second decay reaction?
A) Po
B) Rn
C) U
D) Th
E) Hg
9) The vapor pressure of pure ethanol at 60 oC is 0.459 atm. Raoult's Law predicts that
a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol
ethanol will have a vapor pressure of ________ atm.
A) 0.498
B) 0.413
C) 0.790
D) 0.367
E) 0.0918
10) In which reaction does the oxidation number of hydrogen change?
A) HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)
B) 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g)
C) CaO (s) + H2O (l) → Ca(OH)2 (s)
D) 2HClO4 (aq) + CaCO3 (s) → Ca(ClO4)2 (aq) + H2O (l) + CO2 (g)
E) SO2 (g) + H2O (l) → H2SO3 (aq)
11) Which one of the following is a valid statement of Avogadro's law?
A) = constant
B) = constant
C) PV = constant
D) V = constant x n
E) V = constant x P
12) In which set of elements would all members be expected to have very similar
chemical properties?
A) O, S, Se
B) N, O, F
C) Na, Mg, K
D) S, Se, Si
E) Ne, Na, Mg
13) The intermolecular force(s) responsible for the fact that CH4 has the lowest boiling
point in the set CH4, SiH4, GeH4, SnH4 is/are ________.
A) hydrogen bonding
B) dipole-dipole interactions
C) London dispersion forces
D) mainly hydrogen bonding but also dipole-dipole interactions
E) mainly London-dispersion forces but also dipole-dipole interactions
14) Of the following, only ________ is not a metalloid.
A) B
B) Po
C) Si
D) Ge
E) As
15) 200 pm is the same as ________ .
A) 2000
B) 20
C) 200
D) 2
E) 0.0002
16) Which of the following is arranged correctly in order of increasing distance from
Earth's surface?
A) mesosphere < troposphere < stratosphere < thermosphere
B) troposphere < mesosphere < stratosphere < thermosphere
C) troposphere < mesosphere < thermosphere < stratosphere
D) troposphere < stratosphere < mesosphere < thermosphere
E) mesosphere < troposphere < thermosphere < stratosphere
