Răspuns :
2SO₂ + O₂ -> 2SO₃
H₂ + O₂ -> 2H₂O
CaO + H₂O -> Ca(OH)₂
SO₂ + H2O -> H₂SO₄
H₂ + Cl₂ -> 2HCl
H₂ + O₂ -> 2H₂O
CaO + H₂O -> Ca(OH)₂
SO₂ + H2O -> H₂SO₄
H₂ + Cl₂ -> 2HCl