H₂S = H₂ + S (1+1+1=3)
S + O₂ = SO₂ (1+1+1=3)
2SO₂ + O₂ = 2SO₃ (2+1+2=5)
SO₃ + H₂O = H₂SO₄ (1+1+1=3)
H₂SO₄ + Ba(OH)₂ = BaSO₄ + 2H₂O (1+1+1+2=5)
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H₂S = H₂ + S (1+1+1=3)
S + O₂ = SO₂ (1+1+1=3)
2SO₂ + O₂ = 2SO₃ (2+1+2=5)
SO₃ + H₂O = H₂SO₄ (1+1+1=3)
H₂SO₄ + Ba(OH)₂ = BaSO₄ + 2H₂O (1+1+1+2=5)