Question

Defrition
of mole definition of mole​

Answer 1

Explanation:

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

we can count 12 item as dozen, 144 items as gross but can we count number of atoms .such large the number goes that number is a mole.when the scientist named avagardo counted many times he got a same value

$6.023 \times {10}^{23}$

so it is the value of mole . it is called as avagardo's number or avagardo's constant.

MOLE ( symbol mol)determines number of enties(atoms ,ions,molecules)in a substance .

12

we take carbon C isotope as reference atom to calculate mole because physically and analitically the value is accurate ( not perfect ).