Moley, Moley, Moley, Moley, MoleyMoley Moles are a Chemist best friend.Moles are a Chemist best friend.

What is a Mole?What is a Mole?

A mole is not a critter A mole is not a critter that burrow’s under the that burrow’s under the ground.ground.

A mole is not a little man A mole is not a little man that lives under a bridge that lives under a bridge – that’s a troll– that’s a troll

A mole is a group of A mole is a group of objects – like a dozen is objects – like a dozen is 12 or a gross is 14412 or a gross is 144

Why do we use the word Why do we use the word mole?mole?

The word mole come form the Latin word The word mole come form the Latin word moles which means a pile of things.moles which means a pile of things.

In the case of a mole we mean 6.02 X In the case of a mole we mean 6.02 X 101023 23 objects, molecules, formula units or objects, molecules, formula units or atoms.atoms.

1 dozen = 121 dozen = 12 1 pair = 21 pair = 2 1 mole = 6.02 X 101 mole = 6.02 X 102323

Why 6.02 X 10Why 6.02 X 102323??

The number is based on the C-12 The number is based on the C-12 isotope.isotope.

12 g of the C-12 isotope has exactly 6.02 12 g of the C-12 isotope has exactly 6.02 X 10X 1023 23 atoms.atoms.

The atomic mass is therefore a molar The atomic mass is therefore a molar massmass

So 32.066 grams of Sulfur has exactlySo 32.066 grams of Sulfur has exactly 6.02 X 106.02 X 102323 atoms of sulfur. atoms of sulfur.

Atomic Mass and the Atomic Mass and the MoleMole

One mole of any element has exactly One mole of any element has exactly 6.02 X 106.02 X 102323 atoms of that element. atoms of that element.

You couldn’t possible count that number You couldn’t possible count that number it is too large.it is too large.