Question

Wt is avogadro number? Thanks

Answer 1

The `"Avogadro number"`, `N_A=6.02214xx10^23*mol^-1`

Explanation:

Why do we use such an absurdly large number? Well, because `6.02214xx10^23` individual `""^1H` ATOMS have a mass of `1.00*g` precisely. And a quantity of `6.02214xx10^23` atoms or molecules is referred to as `"A MOLE"` of atoms or molecules.

The mole is thus the link between the sub-micro world of atoms and molecules, to the macro world of grams, and litres, and kilograms. And where do we find the molar masses of individual elements? Where else but the Periodic Table, which tells you precisely the molar masses of the 100 or so chemical elements...