Question

Explain the mole concept.

Answer 1

1. Even a small amount of any substance contains a very large number of atoms or molecules. Therefore, a quantitative adjective 'mole' is used to express a large number of sub-microscopic entities like atoms, molecules, ions, electrons, etc. present in a substance.
2. Thus, one mole is the amount of a substance that contains as many entities or particles as there are atoms in exactly 12 g (or 0.012 kg) of the carbon -12 isotope.
3. One mole is the amount of substance that contains 6.0221367 × 10²³ particles/entities.