1mol atomi are masa 12g si contine 6,023x10²³atomi
x.....................................1atom
x= 12/ 6,023x10²³ g=.......................calculeaza !!!!!!!
M= c1xM1 + c2xM2 + c3xM3 + c4xM4
= 0,0148x204 + 0,236x206+ 0,226x207 + 0,523x208=....................