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1) 2Na+H2SO4 -> Na2SO4 + H2
2) Na2O+H2SO4 -> Na2SO4 + H2O
3) 2NaOH+ H2SO4 -> Na2SO4 +2H2O
4) Na2O + SO3 -> Na2SO4
5) 2NaOH + SO3 -> Na2SO4 + H2O
b) Na₂O + H₂SO₄ → Na₂S0₄ + H₂0
c) 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O
d) Na₂O + SO₃ → Na₂SO₄
e) 2NaNO₃ + H₂SO₄ → Na₂SO₄ + 2HNO₃