Question

Give an account of the ‘mole concept’. 

Answer 1

Mole is a unit to express amount of any chemical compound that contains atoms/molecules/ions equal to atoms present in 12 gram of carbon-12 isotope. This number of atoms is fixed and is equal to 6.022 × 10²³ (Avagadro’s number). Thus a mole expresses a collection of 6.022 × 10²³ atoms, molecules, ions, etc. For e.g., 1 mole of oxygen atom refers to 6.022 × 10²³ atoms of oxygen.