a) ZnO + 2HBr ---> ZnBr₂ + H₂O
b) FeO + H₂S ---> FeS + H₂O
c) K₂O + 2HNO₃ ---> 2KNO₃ + H₂O
d) Na₂O + H₂SO₄ ---> Na₂SO₄ + H₂O
e) Cr₂O₃ + 2H₃PO₄ ---> 2CrPO₄ + 3H₂O
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a) ZnO + 2HBr ---> ZnBr₂ + H₂O
b) FeO + H₂S ---> FeS + H₂O
c) K₂O + 2HNO₃ ---> 2KNO₃ + H₂O
d) Na₂O + H₂SO₄ ---> Na₂SO₄ + H₂O
e) Cr₂O₃ + 2H₃PO₄ ---> 2CrPO₄ + 3H₂O