- A mole is defined as the amount of substance which contains equal number of particles (atoms / molecules / ions) as there are atoms in exactly 12.000g of carbon-12.
- One mole of carbon-12 atom has a mass of exactly 12.000 grams and contains 6.02 x 1023 atoms.
The value 6.02 x 1023 is known as Avogadro Constant.
NA = 6.02 x 1023 mol-1
