1) A reaction that is spontaneous as written ________.
A) is very rapid
B) will proceed without outside intervention
C) is also spontaneous in the reverse direction
D) has an equilibrium position that lies far to the left
E) is very slow
2) Which of the following is a valid set of four quantum numbers? (n, l, ml, ms)
A) 2, 1, 0, +1/2
B) 2, 2, 1, -1/2
C) 1, 0, 1, +1/2
D) 2, 1, +2, +1/2
E) 1, 1, 0, -1/2
3) Hydrogen is unique among the elements because ________.
1. It is not really a member of any particular group.
2. Its electron is not at all shielded from its nucleus.
3. It is the lightest element.
4. It is the only element to exist at room temperature as a diatomic gas.
5. It exhibits some chemical properties similar to those of groups 1A and 7A.
A) 1, 2, 3, 5
B) 1, 2, 3, 4, 5
C) 1, 4, 5
D) 3, 4
E) 2, 3, 4, 5
4) Which one of the following represents an acceptable set of quantum numbers for an
electron in an atom? (arranged as n, l, ml, and ms )
A) 3, 2, -2, -1/2
B) 3, 3, -4, 1/2
C) 3, 4, 6, -1/2
D) 3, 2, 0, 0
E) 3, 3, 3, -1/2
5) What are the respective concentrations (M) of K+ and PO4
3- afforded by dissolving
0.800 mol K3PO4 in water and diluting to 1.63 L?
A) 0.800 and 0.800
B) 0.491 and 0.491
C) 0.800 and 0.491
D) 1.44 and 0.491
E) 0.489 and 0.163
6) The central atom in the ICl4
– ion has ________ nonbonded electron pair(s) and
________ bonded electron pair(s) in its valence shell.
A) 4, 2
B) 0, 4
C) 2, 4
D) 2, 2
E) 6, 0
7) The energy of a photon that has a wavelength of 8.33 X 10-6 m is ________ J.
A) 2.20 X 10-26
B) 3.60 X 1013
C) 2.39 X 10-20
D) 2.7 X 109
E) 4.5 X 10-25
8) The acid-dissociation constant at 25.0 oC for hypochlorous acid (HClO) is 3.0 x 10-8.
At equilibrium, the molarity of H3O+ in a 0.066 M solution of HClO is ________.
A) 4.4 x 10-5
B) 0.066
C) 2.2 x 10-10
D) 4.35
E) 1.18
9) Which of the following statements is false?
A) Ozone is a better reducing agent than O2 (g).
B) Ozone is produced by passing electricity through dry O2 (g).
C) Ozone oxidizes all of the common metals except gold and platinum.
D) Ozone decomposes to O2 and O.
E) Ozone is an allotrope of oxygen.
10) Calculate the pOH of a 0.0727 M aqueous sodium cyanide solution at 25.0 oC. Kb
for CN– is
4.9 x 10-10.
A) 9.33
B) 10.00
C) 5.22
D) 1.14
E) 8.78
11) There is/are ________ π bond(s) in the molecule below.
A) 0
B) 1
C) 2
D) 4
E) 16
12) Heat of sublimation can be approximated by adding together ________ and
________.
A) heat of fusion, heat of condensation
B) heat of fusion, heat of vaporization
C) heat of freezing (solidification), heat of condensation
D) heat of freezing (solidification), heat of vaporization
E) heat of deposition, heat of vaporization
13) The element chlorine is in a group known as the _______.
A) transition metals
B) noble gases
C) alkali metals
D) alkaline earth metals
E) halogens
14) The value of Keq for the following reaction is 0.50:
A (g) + 2B (g) C (g) + 4D (g)
The value of Keq at the same temperature for the reaction below is ________.
A (g) + B (g) C (g) + 2D (g)
A) 7.1 x 10-1
B) 2.5 x 10-1
C) 0.25
D) 1.0
E) 0.50
15) For the reaction aA + Bb –> cC + dD, the rate law is ________.
16) ________ arises when the unpaired electrons of the atoms or ions in a solid are
influenced by the orientations of the electrons of their neighbors.
17) In a proton transfer reaction the weaker a Brnsted-Lowry acid the ________ is its
conjugate.
18) The degree of interaction between two electrical charges depends on the ________
and the ________ of the charges and the distance between them.
19) Mass and volume are often referred to as ________ properties of substances.
20) Name Na [Ru(H2O)2 (C2O4)2].
21) 200.0 ml of a solution containing 0.5000 moles of acetic acid per liter is added to
200.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77 x 10-5.
22) What is the density (in g/L) of oxygen gas at 77.0 °C and 700.0 torr?
23) The number of molecules that participate as reactants defines the ________ of the
reaction.
24) The relative biological effectiveness (RBE) values of beta rays, gamma rays, and
alpha rays are ________, respectively.