Avogadro’s number
A Mole is a Unit or have you heard,
containing six times ten to the twenty-third
That’s a six with twenty three zeros at the end,
Much to big a number to comprehend.
Conversion problems
Moles
Periodic Table
Molar mass
Grams
Avogadro’s #
6.02 x 1023
Atoms
Moles
Grams
Atoms
Mole problems
1.)
What is the mass in grams of 3.50 mol of the
element copper, Cu?
3.50 mol Cu
63.5 g Cu
1
1 mol Cu
= 222 g Cu
Mole problems
2.)
A chemist produced 11.9 g of aluminum, Al. How
many moles of aluminum were produced?
11.9 g Al
1 mol Al
1
27.0 g Al
= 0.441 mol Al
Mole problems
3.) How many moles of silver, Ag, are in 3.01 x
1023 atoms of silver?
3.01 x 1023 atoms Ag
1
1 mol Ag
6.02 x 1023 atoms Ag
= 0.500 mol Ag
Mole problems
4.)
How many atoms of gold(Au) are in 3.00
moles of gold?
3.00 moles Au
1
6.02 x 1023 atoms Au
1 mol Au
1.81 x 1024 = atoms Au
Mole problems
5.)
How many grams of lead (Pb), are in
5.25 x 1021 atoms of lead?
5.25 x 1021
atoms Pb
1 mol Pb
207.2 g Pb
1
6.02 x 1023
atoms Pb
1 mol Pb
= 1.81 g Pb