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2HNO3 + Na2O --> 2NaNO3 + H2O
2HNO3 + MgO --> Mg(NO3)2 + H2O
6HNO3 + Al2O3 --> 2Al(NO3)3 + 3H2O
2.
H2SO4 + K2O --> K2SO4 + H2O
H2SO4 + ZnO --> ZnSO4 + H2O
3H2SO4 + Cr2O3 ---> Cr2(SO4)3 + 3H2O
Pozdrawiam.