Question

Defin 1 mole .

this is science question class9​

Answer 1

One mole is defined as the amount of substance containing as many elementary entities (atoms, molecules, ions, electrons, radicals, etc.) as there are atoms in 12 grams of carbon-12 (6.023 x 1023). The mass of one mole of a substance equals its relative molecular mass expressed in grams. Also spelled as mol.

Answer 2

It is used to represent the mass of a single atom, molecule .