Question

1) K²O+ ... = К²СО³
2) ... + CuO = CuCl² +...
3) FeO + ... = ... + H²O
4) ... + ... = ZnSO⁴ + Н²↑​

Answer 1

1) K2O + CO2 => K2CO3

2) 2HCl + CuO => CuCl2 + H2O

3) FeO + H2 => Fe + H2O

4) Zn + H2SO4 => ZnSO4 + H2