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1) The Lewis structure of AsH3 shows ________ nonbonding electron pair(s) on As.
A) 0
B) 1
C) 2
D) 3
E) This cannot be determined from the data given.
2) Which group 6A element is a metal?
A) tellurium and polonium
B) sulfur
C) selenium
D) tellurium
E) polonium
3) Which one of the following conditions would always result in an increase in the
internal energy of a system?
A) The system loses heat and does work on the surroundings.
B) The system gains heat and does work on the surroundings.
C) The system loses heat and has work done on it by the surroundings.
D) The system gains heat and has work done on it by the surroundings.
E) None of the above is correct.
4) What is the frequency of light (s-1) that has a wavelength of 3.86 X 10-5 cm?
A) 7.77 X 1014 s-1
B) 6.32 X 10-12 s-1
C) 1.04 X 10-13 s-1
D) 9.62 X 1012 s-1
E) 2.14 X 10-16 s-1
5) Which compound listed below has the smallest molar solubility in water?
A) ZnCO3
B) Cd(OH)2
C) CdCO3
D) AgI
E) CaF2
6) Which amino acid is not chiral?
A) leucine
B) isoleucine
C) glycine
D) alanine
E) threonine
7) Sodium forms an ion with a charge of ________.
A) 1+
B) 1-
C) 2+
D) 2-
E) 0
8) The heating curve shown was generated by measuring the heat flow and temperature
for a solid as it was heated. The slope of the ________ segment corresponds to the heat
capacity of the gas.
A) AB
B) BC
C) CD
D) DE
E) EF
9) The thermal decomposition of potassium chlorate can be used to produce oxygen in
the laboratory.
2KClO3 (s) → 2KCl (s) + 3O2 (g)
What volume (L) of O2 gas at 25 °C and 1.00 atm pressure is produced by the
decomposition of 7.5 g of KClO3 (s)?
A) 4.5
B) 7.5
C) 2.3
D) 3.7
E) 11
10) What volume (L) of 0.250 M HNO3 is required to neutralize a solution prepared by
dissolving 17.5 g of NaOH in 350 mL of water?
A) 50.0
B) 0.44
C) 1.75
D) 0.070
E) 1.75 x
11) Oxalic acid is a diprotic acid. If a solid material contains 53.66 percent of oxalic
acid (H2C2O4), by mass, then a 0.6543-g sample of that solid will require ________ mL
of 0.3483 M NaOH for neutralization.
A) 11.19
B) 97.78
C) 28.59
D) 1.119
E) 22.39
12) How many sulfur dioxide molecules are there in 1.80 mol of sulfur dioxide?
A) 1.08 x 1023
B) 6.02 x 1024
C) 1.80 x 1024
D) 1.08 x 1024
E) 6.02 x 1023
13) A wooden object has a mass of 10.782 g and occupies a volume of 13.72 mL. What
is the density of the object determined to an appropriate number of significant figures?
A) 8 X 10-1 g/mL
B) 7.9 X 10-1 g/mL
C) 7.86 X 10-1 g/mL
D) 7.859 X 10-1 g/mL
E) 7.8586 X 10-1 g/mL
14) The concentration of a benzene solution prepared by mixing 15.0 g C6H6 with 38.0
g CCl4
is ________ molal.
A) 5.05
B) 2.40
C) 0.622
D) 0.395
E) 0.508
15) How many total electrons are in the Li+ ion?
A) 2
B) 3
C) 4
D) 7
E) 8
16) The Keq for the equilibrium below is 0.112 at 700.0 oC.
SO2 (g) + O2 (g) SO3 (g)
What is the value of Keq at this temperature for the following reaction?
SO3 (g) SO2 (g) + O2 (g)
A) 0.224
B) 0.0125
C) 0.112
D) 8.93
E) -0.112
