in 1mol Al se gasesc 6,023x10²³ atomi
n=5...................5x6,023x10²³
m= nxA; m= 5molx27g/mol= calculeaza !!!
in 1mol Fe...................6,o23x10²³ atomi
n=10.....................10x6,023x10²³atomi
m= nxA; m= 10molx56g/mol=..............................calculeaza !!!!