Homework Set #3 Solutions
1.
Calculate the density of FeO, given that it has the rock salt crystal structure.
Solution
We are asked to calculate the theoretical density of FeO. This density may be computed using
Equation (12.1) as
n#( AFe + AO )

Homework #1 Solutions
1. (a) Cite two important quantum-mechanical concepts associated with the Bohr model of the atom.
(b) Cite two important additional refinements that resulted from the wave-mechanical atomic model.
Solution
(a) Two important quantum-m

HW #2 Solutions
1.
If the atomic radius of aluminum is 0.143 nm, calculate the volume of its unit cell in cubic meters.
Solution
For this problem, we are asked to calculate the volume of a unit cell of aluminum. Aluminum has
an FCC crystal structure (Tabl

Homework Set #4 Solutions
1. The number-average molecular weight of a polypropylene is 1,000,000 g/mol. Compute the degree of
polymerization.
Solution
m = 3(AC) + 6(AH)
= (3)(12.01 g/mol) + (6)(1.008 g/mol) = 42.08 g/mol
DP =
M n 1, 000, 000 g/m

HW #5 -
Solutions
5.3 Calculate the activation energy for vacancy formation in aluminum, given that the equilibrium number
of vacancies at 500C (773 K) is 7.57 1023 m-3. The atomic weight and density (at 500C) for aluminum
are, respectively, 26.98 g

Quiz 1 Solutions
1. a. Give the electron configuration for Ti (Titanium).
Ti: 1s22s22p63s23p63d24s2
Or [Ar]3d24s2
b. What are the four oxidation states of Ti?
Oxidation states: +1, +2, +3, +4
Ti+: 1s22s22

Quiz 2 Solutions
1. Given that the titanium ion has a +4 oxidation state, identify the correct
chemical formula for the titanium oxide compound from the list below.
a) TiO
b) TiO2
c) Ti2O
Ti4+ + 2O2-

Quiz 3 Solutions
1. Clearly sketch the (001) plane from the FCC unit cell, showing all of the atoms
that lie in the plane. Use a hard sphere representation.
(001)
z
y
x
(001) plane

Quiz 4 Solutions
1. For the two carbon atoms identified by the arrows below, determine the orbital
Quiz #4
hybridization on each (sp, satoms identified by the arrows below,
1. For the two carbon p2, sp3, etc.).
determine