1) The angular momentum quantum number (l) value of 2 indicates the ________
subshell.
A) d
B) f
C) s
D) p
E) +1/2
2) Precision refers to ________.
A) how close a measured number is to other measured numbers
B) how close a measured number is to the true value
C) how close a measured number is to the calculated value
D) how close a measured number is to zero
E) how close a measured number is to infinity
3) The volume occupied by 2.3 mol of gas at 35 °C and 2.0 atm pressure is ________ L.
A) 38
B) 29
C) 3.3
D) 0.053
E) 0.026
4) A 25.0-mL sample of 0.150 M hypochlorous acid is titrated with a 0.150 M NaOH
solution. What is the pH after 13.3 mL of base is added? The Ka of hypochlorous acid is
3.0 x 10-8.
A) 7.25
B) 1.34
C) 4.43
D) 7.58
E) 7.46
5) The element X has three naturally occurring isotopes. The masses (amu) and %
abundances of the isotopes are given in the table below. The average atomic mass of the
element is ________ amu.
A) 159.4
B) 162.0
C) 163.1
D) 161.5
E) 163.0
6) What change will be caused by addition of a small amount of HCl to a solution
containing fluoride ions and hydrogen fluoride?
A) The concentration of hydronium ions will increase significantly.
B) The concentration of fluoride ions will increase as will the concentration of
hydronium ions.
C) The concentration of hydrogen fluoride will decrease and the concentration of
fluoride ions will increase.
D) The concentration of fluoride ion will decrease and the concentration of hydrogen
fluoride will increase.
E) The fluoride ions will precipitate out of solution as its acid salt.
7) Which metal forms cations of differing charges?
A) K
B) Cs
C) Ba
D) Al
E) Sn
8) The kinetics of the reaction below were studied and it was determined that the
reaction rate increased by a factor of 9 when the concentration of B was tripled. The
reaction is ________ order in B.
A + B –> P
A) zero
B) first
C) second
D) third
E) one-half
9) Which of the following could be added to a solution of potassium fluoride to prepare
a buffer?
A) sodium hydroxide
B) potassium acetate
C) hydrochloric acid
D) sodium fluoride
E) ammonia
10) The molecular shape of the PF3 molecule is ________.
A) trigonal pyramidal
B) trigonal bipyramidal
C) see-saw
D) T-shaped
E) octahedral
11) In the energy profile of a reaction, the species that exists at the maximum on the
curve is called the ________.
A) product
B) activated complex
C) activation energy
D) enthalpy of reaction
E) atomic state
12) Cobalt-60 is produced by a three reaction process involving neutron capture,
beta-emission, and neutron capture. The initial reactant in the production of cobalt-60 is
________.
A) 59Co
B) 56Fe
C) 58Fe
D) 61Co
E) 60Fe
13) Why are nitric acid solutions sometimes yellowish?
14) The concept that radiowave propagation was affected by the atmosphere of the earth
was discovered by ________.
15) The resistance of gasoline to engine knocking is referred to as its ________.
16) For a dilute aqueous solution, a concentration of 1 ppb also corresponds to a
concentration of 1 ________ per liter of solution.
17) Which alkali metals can react with oxygen to form either the peroxide or the
superoxide?