1) Coordination sphere isomers ________.
A) have the same molecular formula and coordination number
B) have the same molecular formula but different coordination numbers
C) have different molecular formulas but the same coordination number
D) have different molecular formulas and different coordination numbers
E) are the same as resonance structures
2) The elementary reaction
2NO2 (g) –> 2NO (g) + O2 (g)
is second order in NO2 and the rate constant at 660 K is 5.23 M-1s-1. The reaction
half-life at this temperature when [NO2]0 = 0.45 M is ________ s.
A) 2.4
B) 7.6
C) 0.19
D) 0.13
E) 0.42
3) What is the predominant intermolecular force in HCN?
A) dipole-dipole attraction
B) ion-dipole attraction
C) ionic bonding
D) hydrogen bonding
E) London dispersion forces
4) In the nuclear transmutation represented by Pu( He, n)?, what is the product?
A) uranium-242
B) curium-245
C) curium-242
D) uranium-245
E) uranium-243
5) Calculate the mole fraction of phosphoric acid (H3PO4) in a 38.5% (by mass)
aqueous solution.
A) 0.103
B) 0.115
C) 0.206
D) 0.0516
E) The density of the solution is needed to solve the problem.
6) The largest principal quantum number in the ground state electron configuration of
barium is ________.
A) 1
B) 2
C) 6
D) 4
E) 5
7) Of the following species, ________ will have bond angles of 120°.
A) PH3
B) ClF3
C) NCl3
D) BCl3
E) All of these will have bond angles of 120°.
8) Of the following metals, ________ exhibits multiple oxidation states.
A) Al
B) Rb
C) Mg
D) Ni
E) Cs
9) What is the predominant intermolecular force in CH4?
A) London-dispersion forces
B) ion-dipole attraction
C) ionic bonding
D) dipole-dipole attraction
E) hydrogen bonding
10) Which one of the following elements has a symbol that is not derived from its
foreign name?
A) tin
B) aluminum
C) mercury
D) copper
E) lead
11) Which species has 16 protons?
A) 31P
B) 34S2-
C) 36Cl
D) 80Br–
E) 16O
12) Given the data in the table below, ΔH°rxn for the reaction
2SO2 (g) + O2 (g) → 2SO3 (g)
is ________ kJ.
A) -99
B) 99
C) -198
D) 198
E) The ΔH°f of O2 (g) is needed for the calculation.
13) The most likely van’t Hoff factor for an 0.01 m CaI2 solution is ________.
A) 1.00
B) 3.00
C) 1.27
D) 2.69
E) 3.29
14) Which of the following is not a valid set of four quantum numbers? (n, l, ml, ms)
A) 2, 0, 0, +1/2
B) 2, 1, 0, -1/2
C) 3, 1, -1, -1/2
D) 1, 0, 0, +1/2
E) 1, 1, 0, +1/2
15) Compounds composed of a salt and water combined in definite proportions are
known as ________.
A) clathrates
B) homogenates
C) ionic solids
D) molecular solids
E) hydrates
16) In the following list, only ________ is not an example of matter.
A) people
B) word
C) clock
D) mug
E) neon
17) The n = 8 to n = 4 transition in the Bohr hydrogen atom occurs in the ________
region of the electromagnetic spectrum.
A) infrared
B) visible
C) ultraviolet
D) microwave
E) X-ray
18) Different isotopes of a particular element contain different numbers of ________.
A) protons
B) neutrons
C) protons and neutrons
D) protons, neutrons, and electrons
E) None of the above is correct.
19) The ground state electron configuration of scandium is ________.
20) What happens in the nucleus of an atom that undergoes positron emission?
21) The transport of iron into bacteria is facilitated by the formation of the complex
________.
22) In which of the molecules below is the carbon-carbon distance the shortest?
23) The hydrolysis of an ester in the presence of a base is called ________.
24) Nitric oxide arises from auto emissions and reacts with oxygen to produce
________ which reacts with sunlight to produce ________ atoms which react with
oxygen to produce ________.
25) The number of “free” chloride ions in an ionic coordination compound can be
determined by treating the compound with ________.
26) In the leaves of plants, visible light is absorbed by a compound known as
________, and is aided by a ________ ion bonded to a porphyrin ring.
27) In a hypohalous acid, the oxidation state of the halogen is ________.
28) What is the oxidation state of oxygen in the superoxide ion?