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1) Which one of the following is false concerning pure hydrazine?
A) It is an oily, colorless liquid.
B) It can be made by reaction of hypochlorite and ammonia.
C) It is used as a rocket fuel.
D) Hydrazine is quite poisonous.
E) It is a clear, red liquid that is highly viscous.
2) Consider the following data for a particular radionuclide:
What is the rate constant (in min-1) for the decay of this radionuclide?
A) 45
B) 32
C) 0.024
D) 0.032
E) 0.022
3) What general class of compounds is also known as olefins?
A) alkenes
B) alkynes
C) aromatics
D) alkanes
E) ketones
4) Consider the following data for a particular radionuclide:
What is the half-life (in min) of this radionuclide?
A) 0.024
B) 0.022
C) 32
D) 0.032
E) 45
5) For a given process at constant pressure, w is positive. This means that the process
involves ________.
A) work being done by the system on the surroundings
B) work being done by the surroundings on the system
C) no work being done
D) an equal amount of work done on the system and by the system
E) work being done against a vacuum
6) Which of the following is not one of the 12 principles associated with green
chemistry?
A) distribution of chemical by-products into oceans
B) less hazardous chemical syntheses
C) promotion of the use of catalysts
D) use of renewable feedstocks
E) inherently safer chemistry for accident prevention
7) The molecular weight of maltose (C12H22O11), rounded to one decimal place, is
________ amu.
A) 507.2
B) 182.0
C) 15.0
D) 342.3
E) 29.0
8) Lithium and nitrogen react to produce lithium nitride:
6Li (s) + N2 (g) → 2Li3N (s)
How many moles of lithium nitride are produced when 0.330 mol of lithium react in
this fashion?
A) 0.110
B) 0.660
C) 0.0550
D) 0.990
E) 0.165
9) Determine the Ksp for magnesium hydroxide (Mg(OH)2) where the solubility of
Mg(OH)2 is
1.4 x 10-4 M.
A) 2.7 x 10-12
B) 1.1 x 10-11
C) 2.0 x 10-8
D) 3.9 x 10-8
E) 1.4 x 10-4
10) ________ are used in automotive catalytic converters.
A) Heterogeneous catalysts
B) Homogeneous catalysts
C) Enzymes
D) Noble gases
E) Nonmetal oxides
11) Of the following, ________ is the largest mass.
A) 25 kg
B) 2.5 X 10-2 mg
C) 2.5 X 1015 pg
D) 2.5 X 109 fg
E) 2.5 X 1010 ng
12) One angstrom, symbolized , is 10-10 m. 1 cm3 = ________ 3.
A) 1024
B) 10-24
C) 1030
D) 10-30
E) 10-9
13) A valid Lewis structure of ________ cannot be drawn without violating the octet
rule.
A) NF3
B) IF3
C) PF3
D) SbF3
E) SO4
2-
