Question

Са + О2 =
Zn + HCl =
Mg + ? = MgSO4 + ?
Ba + Н2О = Ba(OH)2 + ?
? +Fe2O3 = Fe + ?
​

Answer 1

1) Cao
2)ZnCl2+H2
3)Mg+ CuSo4= MgSO4+Cu
4)Ba + H2O = Ba(OH)2 + H2
5)CO+ Fe2O3=Fe+CO2