1) The names of complex anions end in ________.
A) -o
B) -ium
C) -ate
D) -ous
E) -ic
2) Of the following, the entropy of ________ is the largest.
A) B2F4 (g)
B) BF3 (g)
C) B2H6 (g)
D) BCl3 (l)
E) B2O3 (s)
3) Which type of liquid crystal is colored and changes color with temperature?
A) nematic
B) smectic A
C) cholesteric
D) smectic B
E) smectic C
4) Which one of the following compounds is superoxide?
A) NaO2
B) Na2O
C) Na2O2
D) NaOH
E) H2O
5) A vessel contains a mixture of 34.9 grams of H2 (g) and 17.7 grams of CH4. If the
total pressure inside the vessel is measured at 2.92 atm, the partial pressure of H2 (g)
must be _____ atm.
A) 2.75
B) 50.5
C) 0.175
D) 53.8
E) 5.53
6) In which of the molecules is the central atom sp3d2 hybridized?
A) (i) and (ii)
B) (iii) only
C) (iii) and (iv)
D) (iv) and (v)
E) (v) only
7) The density of mercury is 13.6 g/cm3. The density of mercury is ________ kg/m3.
A) 1.36 X 10-2
B) 1.36 X 104
C) 1.36 X 108
D) 1.36 X 10-5
E) 1.36 X 10-4
8) A solution contains 39% phosphoric acid by mass. This means that ________.
A) 100 g of this solution contains 39 g of phosphoric acid
B) 1 mL of this solution contains 39 g of phosphoric acid
C) 1 L of this solution has a mass of 39 g
D) 1 L of this solution contains 39 mL of phosphoric acid
E) the density of this solution is 3.9 g/mL
9) Hydrogen can form hydride ions. Elements in group ________ typically form ions
with the same charge as the hydride ion.
A) 1A
B) 2A
C) 6A
D) 7A
E) 3A
10) Which one of the following is a correct representation of a positron?
A) e
B)
C) e
D) e
E)
11) A valid Lewis structure of ________ cannot be drawn without violating the octet
rule.
A) NF3
B) BeH2
C) SO2
D) CF4
E) SO3
2-
12) How many oxygen atoms are there in 52.06 g of carbon dioxide?
A) 1.424 x 1024
B) 6.022 x 1023
C) 1.204 x 1024
D) 5.088 x 1023
E) 1.018 x 1024
13) Calculate the molarity of a 17.5% (by mass) aqueous solution of nitric acid.
A) 0.274 m
B) 2.74 m
C) 3.04 m
D) 4.33 m
E) The density of the solution is needed to solve the problem.
14) What is the pOH of an aqueous solution at 25.0 oC that contains 3.98 x 10-9 M
hydronium ion?
A) 8.400
B) 5.600
C) 9.000
D) 3.980
E) 7.000
15) The pH of a solution prepared by mixing 50.0 mL of 0.125 M NaOH and 40.0 mL
of 0.125 M HNO3 is ________.
A) 13.29
B) 7.00
C) 8.11
D) 11.00
E) 12.14
16) Phosphorous trichloride and phosphorous pentachloride equilibrate in the presence
of molecular chlorine according to the reaction:
PCl3 (g) + Cl2 (g) PCl5 (g)
An equilibrium mixture at 450 K contains
PPCl3 = 0.224 atm,
PCl2 = 0.284 atm, and
PPCl5 = 4.24 atm. What is the value of Kp at this temperature?
A) 66.7
B) 1.50 x 10-2
C) 2.70 x 10-1
D) 3.74
E) 8.36
17) The mole fraction of He in a gaseous solution prepared from 1.0 g of He, 6.5 g of
Ar, and 10.0 g of Ne is ________.
A) 0.28
B) 0.25
C) 0.20
D) 0.66
E) 0.86