Chapter 3. Stoichiometry: Mole-Mass Relationships in Chemical Reactions

1

• The mole (or mol) represents a certain number of objects.

• SI def.: the amount of a substance that contains the same  number of entities as there are atoms in 12 g of carbon-12.

• Exactly 12 g of carbon-12 contains 6.022 x 10 23 atoms.

• One mole of H 2O molecules  contains 6.022 x 10 23 molecules.

Concept 1. The meaning and usefulness of the mole

Next slide

Back to first slide

View graphic version