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1) The pH of a solution that contains 0.800 M acetic acid (Ka = 1.76 x 10-5) and 0.172
M sodium acetate is ________.
A) 4.087
B) 5.422
C) 8.578
D) 8.370
E) 9.913
2) Which one of the following statements is true?
A) Enthalpy is an intensive property.
B) The enthalpy change for a reaction is independent of the state of the reactants and
products.
C) Enthalpy is a state function.
D) H is the value of q measured under conditions of constant volume.
E) The enthalpy change of a reaction is the reciprocal of the H of the reverse reaction.
3) Using the VSEPR model, the electron-domain geometry of the central atom in XeF4
is ________.
A) linear
B) trigonal planar
C) tetrahedral
D) trigonal bipyramidal
E) octahedral
4) Calculate the kinetic energy in joules of a 150 lb jogger (68.1 kg) traveling at 12.0
mile/hr (5.36 m/s).
A) 1.96 x 103 J
B) 365 J
C) 978 J
D) 183 J
E) 68.1 J
5) Starch, glycogen, and cellulose are made of repeating units of ________.
A) lactose
B) glucose
C) fructose
D) sucrose
E) amino acids
6) The normal boiling point of ethanol (C2H5OH) is 78.3 oC and its molar enthalpy of
vaporization is 38.56 kJ/mol. What is the change in entropy in the system in J/K when
112.2 grams of ethanol at 1 atm condenses to a liquid at the normal boiling point?
A) 382
B) 1199
C) -382
D) -1199
E) -267
7) The correct name for [Co(NH3)5Cl]Cl2 is ________.
A) pentaaminechlorocobalt (III) chloride
B) chloropentaammoniacobalt (II) chloride
C) pentaammoniachlorocobalt (II) chloride
D) cobalt (III) pentaamino trichloride
E) cobalt (III) pentaamminemonochloride chloride
8) The reaction of alkali metals with oxygen produce ________.
A) oxides
B) peroxides
C) superoxides
D) all of the above
E) none of the above
9) Lead (II) carbonate decomposes to give lead (II) oxide and carbon dioxide:
PbCO3 (s) → PbO (s) + CO2 (g)
________ grams of lead (II) oxide will be produced by the decomposition of 8.75 g of
lead (II) carbonate?
A) 0.41
B) 2.50
C) 0.00936
D) 7.31
E) 11.7
10) According to kinetic-molecular theory, in which of the following gases will the
root-mean-square speed of the molecules be the highest at 200 °C?
A) NH3
B) N2O
C) O2
D) UF6
E) None. The molecules of all gases have the same root-mean-square speed at any
given temperature.
