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Ответ №1

CuO + H2SO4 = CuSO4 + H2O
CuO + 2HCl = CuCl2 + H2O
3K2O + P2O5 = 2K3PO4
K2O + H2O = 2KOH
K2O + H2SO4 = K2SO4 + H2O
K2O + 2HCl = 2KCl + H2O
SO2 + 2NaOH = Na2SO3 + H2O
SO2 + H2O = H2SO3

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