Question

CaO+? --> Ca(NO3)2+?

Fe2O3+? --> Fe2(SO4)3+?

MgO+? --> MgCl2+?

SO2+KOH --> ?+?

CO2+Ba(OH)2 --> ?+?

Answer 1

CaO + 2HNO3 --> Ca(NO3)2 + H2O

Fe2O3 + 3H2SO4  --> Fe2(SO4)3 + 3H2O

MgO + 2HCl --> MgCl2 + H2O

SO2 + KOH --> K2SO3 + H2O

CO2+Ba(OH)2 --> BaCO3 ↓ + H2O

Answer 2

1)CaO+HNO3--->Ca(NO3)2+H2O

2)Fe2O3+H2SO4-->Fe2(SO4)3+H2O

3)MgO+HCL-->MgCl2+H2O

4)SO2+KOH-->K2SO4+H2O

5)CO2+Ba(OH)2--->H2CO3+BaO