A Ca= 40 g
40g Ca.....6,022·10{23} atomi
Xg Ca......2·6.022·10{23} atomi
40/1=6,022·10{23}/2·6,022·10{23}=>x=80g
A H=1g
1g......6,022·10{23}atomi
Yg....2·6,022·10{23}atomi
1/y22·10{23}/2·6,022·10{23}=> y=2g
A Cl=35,5 g
35,5g Cl.....6,022·10{23}atomi
Z g Cl.......2·6,022·10{23} atomi
35,5/z=6,022·10{23}/2·6,022·10{23} atomi=> z=71 g
Spre ca te-am ajutat!