Здравствуйте.
BaO + SO₂ = BaSO₃ (А-2)
H₂SO₄ + K₂<span>O = K</span>₂SO₄ + H₂<span>O (Б-1)
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Cu(OH)₂<span> + </span>H₂SO₄<span> = CuSO</span>₄<span> + </span>2H₂<span>O (В-3)</span>
4Li + O2 = 2Li2O
C + O2 = CO2
4P + 5O2 = 2P2O5
H2S + 2O2 = H2O + SO3
C3H8 + 5O2 = 3CO2 + 4H2O