1) Calcium is a ________ and silver is a ________.
A) nonmetal, metal
B) metal, metal
C) metalloid, metal
D) metal, metalloid
E) nonmetal, metalloid
2) Which equation correctly represents the reaction between elemental chlorine and
sodium iodide?
A) Cl + NaI –> I + NaCl
B) Cl– + NaI –> I– + NaCl
C) Cl2 + 2NaI –> I2 + 2NaCl
D) Cl + NaI –> 1/2 I2 + NaCl
E) Cl2 + NaI –> NaCl2 + I–
3) The equilibrium constant (Kp) for the interconversion of PCl5 and PCl3 is 0.0121:
PCl5 (g) PCl3 (g) + Cl2 (g)
A vessel is charged with PCl5 giving an initial pressure of 0.123 atm. At equilibrium,
the partial pressure of PCl3 is ________ atm.
A) 0.0782
B) 0.0455
C) 0.0908
D) 0.0330
E) 0.123
4) The concentration of KBr in a solution prepared by dissolving 2.10 g of KBr in 897 g
of water is ________ molal.
A) 2.46
B) 0.0000207
C) 0.0197
D) 0.0167
E) 0.0186
5) The Keq for the equilibrium below is 7.16 x 10-2 at 440.0 oC.
2Cl2 (g) + 2H2O (g) 4HCl (g) + O2 (g)
What is the value of Keq at this temperature for the following reaction?
Cl2 (g) + H2O (g) 2HCl (g) + O2 (g)
A) 0.0716
B) 5.13 x 10-3
C) 0.268
D) 0.0376
E) 0.150
6) Hydrocarbons containing only single bonds between the carbon atoms are called
________.
A) alkenes
B) alkynes
C) aromatics
D) alkanes
E) ketones
7) When the following equation is balanced, the coefficient of H3PO4 is ________.
H3PO4 (aq) + NaOH (aq) → Na3PO4 (aq) + H2O (l)
A) 1
B) 2
C) 3
D) 4
E) 0
8) There are ________ mol of carbon atoms in 5 mol of dimethylsulfoxide (C2H6SO).
A) 4
B) 8
C) 10
D) 12
E) 14
9) When work is done on a system, w will be a ________ value.
A) positive
B) negative
C) very large
D) very small
E) There is not enough information given to determine the answer.
10) Calculate the enthalpy change (in kJ) associated with the conversion of 25.0 grams
of ice at -4.00 oC to water vapor at 109.0 oC. The specific heats of ice, water, and steam
are 2.09 J/g-K, 4.18 J/g-K, and
1.84 J/g-K, respectively. For H2O, ΔHfus = 6.01 kJ/mol and ΔHvap = 40.67 kJ/mol.
A) 64.8
B) 75.9
C) 11100
D) 12000
E) 112
11) Which one of the following is correct?
A) v + λ = c
B) v / λ = c
C) v = cλ
D) λ = c v
E) vλ = c
12) SO2 (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C. The
total pressure in the container was ________ atm.
A) 0.192
B) 4.02
C) 2.76
D) 6.78
E) 1.60
13) Which quantum number determines the energy of an electron in a hydrogen atom?
A) n
B) E
C) ml
D) l
E) n and l