ANSWERS TO ASSIGNED HOMEWORK PROBLEMS NOT ANSWERED IN THE
STUDENT SOLUTIONS MANUAL
(listed in the order given on the syllabus)
3.0 x 10
density = 7.25 g/cm
(a) 1.2 x 10
(b) 1.49 x 10
8.32 x 10
(a) 3.8 g
(b) 1.0 mL
(c) 565 cm
Z gives the number of protons, N gives the number of neutrons, and A is the mass
N = A – Z.
(a) These have different numbers of protons, neutrons, and
electrons, but have the same A value.
(b) These have the same number of neutrons, but
different numbers of protons and electrons and different A values.
(c) These have the
same number of protons and electrons, but different numbers of neutrons and different A
Metals are generally hard, shiny, malleable, ductile, good conductors of heat and
electricity, and form positive ions by losing electrons.
Nonmetals are generally soft,
brittle, dull, poor conductors of heat and electricity, and form negative ions by gaining
shows both ionic and covalent bonding:
covalent bonding between N and O in
and ionic bonding between NO
MgO has stronger ionic attraction due to the larger positive ionic charge.
(a) sodium hydrogen phosphate
(c) sodium nitrite
(a) perchloric acid, HClO
(b) nitric acid, HNO
(c) bromous acid, HBrO
(d) hydrofluoric acid, HF
(a) copper(II) sulfate pentahydrate
(b) calcium hydroxide
(c) sulfuric acid
(d) sodium carbonate
(e) hydrochloric acid
(f) magnesium sulfate heptahydrate
(g) calcium carbonate
(h) carbon dioxide
(i) sodium hydrogen carbonate
(j) sodium hydroxide
A homogeneous mixture is uniform in its macroscopic, intensive properties.
heterogeneous mixture exhibits differences in these properties from one part of the
mixture to another.
The properties vary discontinuously along at least one
macroscopically observable boundary.
(For example, the value of the density may jump
from one numerical value to a different numerical value as a boundary is crossed.)
some cases, boundaries can be seen only with a microscope.
53.96 g Al ; 106.35 g Cl
A mole of nitrogen could be interpreted as a mole of nitrogen atoms or as a mole of
Be specific to avoid confusion.
The same problem is possible with
other diatomic or polyatomic molecules, for example, Cl