MOLE CONVERSIONS

Remember…..

1 mole = 6.02 x 1023 atoms of

element/molecules of chemical compound

Atomic mass of element Formula mass of a compound

Example 1:

Calcium has a mass of 10.0g. How many moles of Calcium? Atoms?

Example 2:

86.2 grams C2H4. How many moles of C2H4? How many molecules?

Formula Mass

Sum of atoms/ions’ masses in a chemical formula.

Molecular mass— Refers to the sum of atom masses in a

molecular formula.

Example 1:

NaCl

Example 2:

Which of the following contains the same number of atoms as 4.032g of hydrogen atoms?

A) 1 mole of H2

B) 6.022 x1023 moles of H

C) 6.022 x 1023 moles of H2

D) (2)(6.022x1023) moles of H2

Practice

1) C22H24N2O8 (tetracycline)

2) C5H8NNaO4 (MSG)