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1) The name of the ionic compound NaBrO4 is ________.
A) sodium perbromate
B) sodium bromate
C) sodium hypobromate
D) sodium perbromite
E) sodium bromide
2) What is/are the product(s) of photodissociation of molecular oxygen?
A) molecular nitrogen
B) excited oxygen molecules
C) ozone
D) ozone and atomic oxygen
E) atomic oxygen
3) The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O:
4 NH3 (g) + 7O2 (g) → 4 NO2 (g) + 6 H2O (g)
The combustion of 14.4 g of ammonia consumes ________ g of oxygen.
A) 13.5
B) 28.8
C) 54.1
D) 47.3
E) 94.6
4) A titration reached the equivalence point when 16.1 mL of 0.209 M H2SO4 (aq) was
added to 12.0 mL of NaOH (aq) of unknown concentration. What is the concentration
(M) of this unknown NaOH solution?
A) 0.561
B) 80.8
C) 0.280
D) 0.140
E) 3.21
5) Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope
uranium-235. The half-life of strontium-90 is 28.8 yr. What percentage of a
strontium-90 sample remains after 175.0 yr?
A) 84.8
B) 1.48
C) 0.230
D) 16.5
E) 6.08
6) The number of electrons in the valence shell of Xe in XeF6 is ________
A) 10
B) 12
C) 14
D) 6
E) 8
7) The molar heat capacity of a compound with the formula C2H6 SO is 88.0 J/mol-K.
The specific heat of this substance is ________ J/g-K.
A) 88.0
B) 1.13
C) 4.89
D) 6.88 x 103
E) -88.0
8) The phase diagram of a substance is shown above. The area labeled ________
indicates the solid phase for the substance.
A) w
B) x
C) y
D) z
E) y and z
9) What is the oxidation state of carbon in the carbonate ion?
A) +4
B) +2
C) 0
D) -2
E) -4
10) What is the predominant intermolecular force in H2NNH2?
A) hydrogen bonding
B) ion-dipole attraction
C) ionic bonding
D) dipole-dipole attraction
E) London-dispersion forces
11) When a hydrocarbon burns in air, a component produced is ________.
A) oxygen
B) nitrogen
C) carbon
D) water
E) argon
