.Calculate the number of copper atoms in a 63.55 g sample of
copper. .What is the...
.Calculate the number of copper atoms in a 63.55 g sample of
copper. .What is the mass in grams of 0.509 moles of AlCl3? .Which
of the following 100.0 g samples contains the greatest number of
atoms?
Calculate the number of oxygen molecules and the number of
oxygen atoms in 30.5 g of O2. Enter your answers in
scientific notation.
Calculate the mass of 9.31 x 1014 SO3
molecules. Enter your answers in scientific notation
The atomic mass number of copper is 64. Assume that atoms in
solid copper form a cubic crystal lattice. To visualize this,
imagine stacking tiny sugar cubes into a big cube. If you pretend
there is a copper atom in the middle of each sugar cube, then
dissolve the sugar away, the copper forms a cubic lattice. What is
the smallest distance between copper atoms?
Hint: The answer is 0.228nm, but you must still show all your
work with clear...
1. Assume that you start with 0.495 g of copper turnings:
a)Calculate the initial number of moles of Cu.
ANSWER CALCULATED ALREADY: 7.79×10-3
mol
b) Calculate the minimum volume of 16.0 M HNO3
required to dissolve all of the copper (step 1).
c)If, in practice, 5.0 mL of 16.0 M nitric acid were added to
effect the dissolution of the copper (step 1), what would be the
minimum volume of 4.00 M NaOH required to neutralize the
remaining acid and...
An 65.73 g sample of aluminum is placed on a 56.35 g sample of
copper initially at 111.86oC. If the heat is only
transferred between the metals (with no loss to the surroundings)
and the final temperature of both metals is 36.38oC,
what is the inital temperature (in oC) of aluminum?
Use Avagadros number to calculate the number of molecules of
H2S, the number of atoms of H, and the number of atoms of S, in
5.25 moles of H2S. Show all work and keep track of units and
significant figures.
1.
What would you multiply "grams of copper" by to
get the units "atoms of copper" ?
g
Cu
= atoms
Cu
(number)
(unit)
(number)
(unit)
(number)
(unit)
(number)
(unit)
2.
What would you multiply "atoms of calcium" by
to get the units "grams of calcium" ?
atoms
Ca
= g
Ca
(number)
(unit)
(number)
(unit)
(number)
(unit)
(number)
(unit)