What is a Mole?

What is a Mole?

A big problem when we try to count atoms. We can compare numbers of atoms quite easily.

Mole:

Chemists use atoms of carbon-12 as their standard and measure the amount of a substance in a unit called 'the mole'.

One mole of a substance contains the same number of particles as atoms in 12 grams of carbon-12.

In 1 gram (1 mole) of hydrogen there are about 600 000 000 000 000 000 000 000 atoms.

This number is known as the 

Avogadro constant, and is written 6 x 10²³.

moles of atoms = mass/R.A.M.

The mole, abbreviated mol, is an SI unit which measures the number of particles in a specific substance. 

A mole is the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12.

One mole is the Avogadro number of particles (atoms, molecules, ions or electrons) in a substance.