1) The rate law for a reaction is
rate = k[A][B]
Which one of the following statements is false?
A) The reaction is first order overall.
B) The reaction is first order in A.
C) The reaction is first order in [B].
D) k is the reaction rate constant
E) If [A] is doubled, the reaction rate will increase by a factor of 2.
2) Given the following reactions
N2 (g) + 2O2 (g) → 2NO2 (g) ΔH = 66.4 kJ
2NO (g) + O2 (g) → 2NO2 (g) ΔH = -114.2 kJ
the enthalpy of the reaction of the nitrogen to produce nitric oxide
N2 (g) + O2 (g) → 2NO (g)
is ________ kJ.
A) 180.6
B) -47.8
C) 47.8
D) 90.3
E) -180.6
3) The value of ΔH° for the reaction below is +128.1 kJ:
CH3OH (l) → CO (g) + 2H2 (g)
How many kJ of heat are consumed when 5.10 g of CO (g) is formed as shown in the
equation?
A) 0.182 kJ
B) 162 kJ
C) 8.31 kJ
D) 23.3 kJ
E) 62.0 kJ
4) An antibonding MO ________ the corresponding bonding MO.
A) is always lower in energy than
B) can accommodate more electrons than
C) can accommodate fewer electrons than
D) is always higher in energy than
E) is always degenerate with
5) A 0.333-g sample of an unknown pure gas occupies a volume of 0.255 L at a pressure
of 1.00 atm and a temperature of 100.0 °C. The unknown gas is ________.
A) xenon
B) neon
C) krypton
D) helium
E) argon
6) Which metal does not form cations of differing charges?
A) Na
B) Cu
C) Co
D) Fe
E) Sn
7) [Ne]3s23p3 is the electron configuration of a(n) ________ atom.
A) As
B) V
C) P
D) Sb
E) Sn
8) ________ is an oxidation reaction.
A) Ice melting in a soft drink
B) Table salt dissolving in water for cooking vegetables
C) Rusting of iron
D) The reaction of sodium chloride with lead nitrate to form lead chloride and sodium
nitrate
E) Neutralization of HCl by NaOH
9) A gas is ________ and assumes ________ of its container, whereas a liquid is
________ and assumes ________ of its container.
A) compressible, the volume and shape, not compressible, the shape of a portion
B) compressible, the shape, not compressible, the volume and shape
C) compressible, the volume and shape, compressible, the volume
D) condensed, the volume and shape, condensed, the volume and shape
E) condensed, the shape, compressible, the volume and shape
10) For the elementary reaction
NO3 + CO –> NO2 + CO2
the molecularity of the reaction is ________, and the rate law is
A) 2, k[NO3][CO]
B) 4, k[NO3][CO][NO2][CO2]
C) 2, k[NO2][CO2]
D) 2, k[NO3][CO]/[NO2][CO2]
E) 4, k[NO2][CO2]/[NO3][CO]
11) Who is credited with first achieving fission of uranium-235?
A) Fermi
B) Rutherford
C) Curie
D) Dalton
E) Faraday
12) In nature, the noble gases exist as ________.
A) monatomic gaseous atoms
B) the gaseous fluorides
C) solids in rocks and in minerals
D) alkali metal salts
E) the sulfides
13) The wavelength of a photon that has an energy of 6.33 X 10-18 J is ________ m.
A) 3.79 X 10-7
B) 3.10 X 10-8
C) 2.38 X 1023
D) 4.21 X 10-24
E) 9.55 X 1015
14) The atomic radius of main-group elements generally increases down a group
because ________.
A) effective nuclear charge increases down a group
B) effective nuclear charge decreases down a group
C) effective nuclear charge zigzags down a group
D) the principal quantum number of the valence orbitals increases
E) both effective nuclear charge increases down a group and the principal quantum
number of the valence orbitals increases
15) 200 pm is the same as ________ .
A) 2000
B) 20
C) 200
D) 2
E) 0.0002
16) The density of krypton gas at 0.866 atm and 44.4 °C is ________ g/L.
A) 0.0332
B) 0.359
C) 0.238
D) 2.78
E) 5.57
17) Gases do not have a fixed ________ as they are able to be ________.
18) A reversible change produces the maximum amount of ________ that can be
achieved by the system on the surroundings.
19) I am a highly polar, strongly hydrogen-bonded liquid with a density of 1.47 g/cm3. I
can decompose to form O2. Who am I?