602200000000000000000000

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.

Moles

Grams Atoms

6.02 x 1023Molar massPeriodic Table Avogadro’s #

Conversion problems

Grams Atoms

Moles

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 mol Ag1 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 6.02 x 1023 atoms Au1 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