1) Thermodynamic Quantities for Selected Substances at 298.15 K (25 oC)
The value of S o for the catalytic hydrogenation of acetylene to ethene,
C2H2 (g) + H2 (g) –> C2H4 (g)
is ________ J/K mol.
A) +18.6
B) +550.8
C) +112.0
D) -112.0
E) -18.6
2) The uncertainty principle states that ________.
A) matter and energy are really the same thing
B) it is impossible to know anything with certainty
C) it is impossible to know the exact position and momentum of an electron
D) there can only be one uncertain digit in a reported number
E) it is impossible to know how many electrons there are in an atom
3) The reaction of 25 mL of N2 gas with 75 mL of H2 gas to form ammonia via the
equation:
N2 (g) + 3H2 (g) → 2NH3 (g)
will produce ________ mL of ammonia if pressure and temperature are kept constant.
A) 250
B) 50
C) 200
D) 150
E) 100
4) Using the data in the table, which of the conjugate acids below is the strongest acid?
A) HClO
B) HCO3
–
C) H2S
D) NH3CH3
+
E) H2S and HClO
5) A gas originally at 27 °C and 1.00 atm pressure in a 3.3 L flask is cooled at constant
pressure until the temperature is 11 °C. The new volume of the gas is ________ L.
A) 0.27
B) 3.1
C) 3.3
D) 3.5
E) 0.24
6) The value of G o for a reaction conducted at 25 oC is 2.8 kJ/mol. The equilibrium
constant for a reaction is ________ at this temperature.
A) 1.13
B) -4.2
C) 0.32
D) -1.13
E) More information is needed.
7) A ________ orbital is degenerate with a 5dz
2 in a many-electron atom.
A) 5pz
B) 4dz
2
C) 5s
D) 5dxy
E) 4dzz
8) An aqueous ethanol solution (400 mL) was diluted to 4.00 L, giving a concentration
of 0.0400 M. The concentration of the original solution was ________ M.
A) 0.400
B) 0.200
C) 2.00
D) 1.60
E) 4.00
9) Eutrophication of a lake is the process of ________.
A) rapid increase in the amount of dead and decaying plant matter in the lake as a result
of excessive plant growth
B) rapid decline in the lake’s pH due to acid rain
C) dissolved oxygen being depleted by an overpopulation of fish
D) stocking the lake with fish
E) restoration of the lake’s dissolved oxygen supply by aerobic bacteria
10) An electron cannot have the quantum numbers n = ________, l = ________, ml =
________.
A) 6, 1, 0
B) 3, 2, 3
C) 3, 2, -2
D) 1, 0, 0
E) 3, 2, 1
11) What is the molecular formula for butane?
A) C2H8
B) C3H6
C) C3H8
D) C4H8
E) C4H10
12) Boron can violate the octet rule in its compounds in that ________.
A) it can have an expanded octet
B) it can exist in a molecule with an odd number of electrons
C) its compounds are all ionic
D) it can have fewer than eight valence electrons
E) Boron cannot violate the octet rule.
13) In which of the following aqueous solutions would you expect AgF to have the
highest solubility?
A) 0.00750 M LiF
B) 0.030 M AgNO3
C) 0.023 M NaF
D) 0.015 M KF
E) AgF will have the same solubility in all solutions.