Since both CaO and MgO are basic oxides, they will react with HNO3 to form Ca(NO3)2 and Mg(NO3)2, respectively:
CaO + 2HNO3 -> Ca(NO3)2 + H2O
MgO + 2HNO3 -> Mg(NO3)2 + H2O
Therefore, the overall reaction would be:
CaO + MgO + 4HNO3 -> Ca(NO3)2 + Mg(NO3)2 + 2H2O
Since both CaO and MgO are basic oxides, they will react with HNO3 to form Ca(NO3)2 and Mg(NO3)2, respectively:
CaO + 2HNO3 -> Ca(NO3)2 + H2O
MgO + 2HNO3 -> Mg(NO3)2 + H2O
Therefore, the overall reaction would be:
CaO + MgO + 4HNO3 -> Ca(NO3)2 + Mg(NO3)2 + 2H2O