Question

A conceptual note on Mole concept.Please.

Answer 1

A mole is that quantity of a substance whose mass in grams is equal to the molecular mass of the substance in Daltons.
For eg. The molecular mass of Oxygen is 32u. Therefore, 32g of Oxygen is one mole of oxygen.

Answer 2

A mole is defined as the amount of substance that contains as many atoms, ions. ,molecules or any other elementary entities as there are carbon atoms in 12gm. of.... The number of atoms in 12gm. of..... is called Avagadro number.