1) Which element has the largest bonding atomic radius?
A) scandium
B) titanium
C) vanadium
D) chromium
E) manganese
2) The rate constant for this reaction is ________ s-1.
A) 6.9 x 10-2
B) 3.0 x 10-2
C) 14
D) 0.46
E) 4.0 x 102
3) Chemical treatment of municipal water supplies commonly entails use of CaO,
Al2(SO4)3, and Cl2. The purpose of adding CaO is to ________.
A) remove all HCO3
– as solid CaCO3
B) remove all SO4
2- as solid CaSO4
C) remove all Cl– as solid CaCl2
D) selectively kill anaerobic (but not aerobic) bacteria
E) make the water slightly basic so that addition of Al2(SO4)3 will afford a gelatinous
precipitate of Al(OH)3
4) The correct name of the compound Na3N is ________.
A) sodium nitride
B) sodium azide
C) sodium trinitride
D) sodium(III) nitride
E) trisodium nitride
5) The volume of 0.43 mol of an ideal gas at 365 torr and 97 °C is ________ L.
A) 0.054
B) 7.1
C) 11
D) 27
E) 0.024
6) Which pair of elements would you expect to exhibit the greatest similarity in their
physical and chemical properties?
A) Li, F
B) Sr, Te
C) O, S
D) In, Sb
E) Ti, Ne
7) The n = 5 to n = 3 transition in the Bohr hydrogen atom corresponds to the ________
of a photon with a wavelength of ________ nm.
A) absorption, 657
B) absorption, 1280
C) emission, 657
D) emission, 1280
E) emission, 389
8) Of the elements below, ________ is the most metallic.
A) Sn
B) P
C) Br
D) Rn
E) As
9) Which one of the following substances will have hydrogen bonding as one of its
intermolecular forces?
A)
B)
C)
D)
E)
10) What is the molar solubility of calcium carbonate ( CaCO3 ) in water? The
solubility-product constant for CaCO3 is 4.5 x 10-9 at 25 oC.
A) 2.3 x 10-9
B) 9.0 x 10-9
C) 8.35
D) 9.5 x 10-5
E) 6.7 x 10-5
11) ________-orbitals are spherically symmetrical.
A) s
B) p
C) d
D) f
E) g
12) Thermodynamic Quantities for Selected Substances at 298.15 K (25 oC)
The value of S o for the oxidation of carbon to carbon dioxide,
C (s, graphite) + O2 (g) –> CO2(g)
is ________ J/K mol. The combustion of carbon, as in charcoal briquettes, in the
presence of abundant oxygen produces carbon dioxide.
A) +424.3
B) +205.0
C) -205.0
D) -2.9
E) +2.9
13) A 0.15 M aqueous solution of the weak acid HA at 25.0 oC has a pH of 5.35. The
value of Ka for HA is ________.
A) 3.0 x 10-5
B) 1.8 x 10-5
C) 7.1 x 10-9
D) 1.3 x 10-10
E) 3.3 x 104
14) Due to the nature of the positron, ________ is actually detected in positron
emission tomography.
A) alpha radiation
B) beta radiation
C) gamma radiation
D) x -ray emission
E) neutron emission
15) The reaction
2NO2–> 2NO + O2
follows second-order kinetics. At 300 oC, [NO2] drops from 0.0100 M to 0.00650 M in
100.0 s. The rate constant for the reaction is ________ M-1s-1.
A) 0.096
B) 0.65
C) 0.81
D) 1.2
E) 0.54
16) At 20 oC, an aqueous solution that is 12.0% by mass in ammonium chloride has a
density of
1.0344 g/mL. What is the molarity of ammonium chloride in the solution? The formula
weight of NH4Cl is 53.50 g/mol.
A) 2.55
B) 0.232
C) 2.32
D) 0.0862
E) 11.6
17) Of the following, only ________ appears to gain mass in a magnetic field.
A) C2
B) N2
C) F2
D) O2
E) Li2
18) In the Lewis structure of HCO3
–, the formal charge on H is ________, and the
formal charge on C is ________.
A) -1, -1
B) 0, 0
C) 0, -1
D) +1, -1
E) -1, +1
19) The density of air under ordinary conditions at 25 °C is 1.19 g/L. How many
kilograms of air are in a room that measures 9.0 ft X 11.0 ft and has a 10.0 ft ceiling?
A) 2.99
B) 0.124
C) 3.34 X 104
D) 0.0644
E) 33.4
20) Of the possible bonds between carbon atoms (single, double, and triple), ________.
A) a triple bond is longer than a single bond
B) a double bond is stronger than a triple bond
C) a single bond is stronger than a triple bond
D) a double bond is longer than a triple bond
E) a single bond is stronger than a double bond