Calculez masa unui mol de CO sI, apoi, masa unei molecule, stiin ca un mol contine N,A numarul lui Avogadro molecule
M= (12gC+16gO)/mol= 28g/mol
1mol..........are masa 28g ...si contine 6,023x10²³molecule
28g..............6,023x10²²molecule
m= ? 1molecula m= 28g/ 6,023x10²³molec
=4,65x10⁻²³ g/molecula