Răspuns:
Mg+ Cl2,=> MgCl2
2Al+ 3Cl2 =>2 AlCl3
2Fe+3Cl2 => 2FeCl3
Cu + Cl2=> CuCl2
MMg=24g/mol
m=24×4=96g
24g 95g
Mg+Cl2 => MgCl2
96g xg
MMgCl2=24+2×35,5=95g/mol
x=96×95/24=380g
1mol 1mol
Mg + Cl2 => MgCl2
4moli ymoli
y=4×1/1=4moli
