6,023x10²³ atomi sunt in.... 1molCa..... 1molH... .1molCl
2x6,023x10²³ atomi sunt in.....2molCa.....2molH.......2molCl
A,Ca=40g/mol--->m= 2molx40g/mol = 80gCa
A,H= 1g/mol------>m=........................................
A,Cl= 35,5g/mol---->m= .................calculeaza
A are valori scoase din s.p.