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What is a Mole?

A mole is a word which represents a number.
Like the word "dozen" represents the number 12,
so "mole" represents the number 6 x 1023.

This number is also called Avogadro's Number - see definition.
It is a very very big number (6 followed by 23 zeros).

In the same way that you can
have a dozen atoms, or cars, or apples,
so you can also have a mole of atoms, or cars, or apples
(though it would take you a long time to eat them all!).

Needless to say, chemists are concerned
with atoms, ions, molecules and compounds.

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