Two sources of copper are cuprite, which has
the IUPAC name copper(I) oxide, and malachite, which has the
formula Cu2CO3(OH)2.
Copper is used in home wiring and electric motors because it
has good electrical conductivity. Other uses of copper not
related to its electrical conductivity include coins,
plumbing, roofing, and cooking pans. Aluminum is also used
for cooking pans. At room temperature, the electrical
conductivity of a copper wire is 1.6 times greater than an
aluminum wire with the same length and cross-sectional area.
At room temperature, the heat conductivity of copper is 1.8
times greater than the heat conductivity of aluminum. At STP,
the density of copper is 3.3 times greater than the density
of aluminum.
80 Write the chemical formula of cuprite. [1]
HIGHLIGHT TO SEE THE ANSWER
81 Determine the oxidation number of oxygen
in the carbonate ion found in malachite. [1]
HIGHLIGHT TO SEE THE ANSWER
82 Identify
one
physical property of copper that makes it a good choice for
uses that are
not related to
electrical conductivity. [1]
HIGHLIGHT TO SEE THE ANSWER
|
Copper
is very malleable.
good
conductor of heat
high
melting point
pretty
much anything you can think of that is not a
chemical property |
83 Identify
one
physical property of
aluminum that could make it a better choice than copper for
a cooking pan. [1]
HIGHLIGHT TO SEE THE ANSWER
|
An
aluminum pan has less mass than a copper pan of
the same size because aluminum is less
dense.
Aluminum
is less dense than copper.
A Cu pan
would weigh more.
MY
favorite=color, so the pans will match the pots |