какая из этих формул реакция замещения? (ответов может быть несколько)1) 2CaHPO4 + Ca(OH)2 = Ca3(PO4)2 + 2H2O 2) 3Fe2O3 + CO = 2Fe3O4 + CO2 3) 2HClO3 + I2 = 2HIO3 + Cl2 4) 2CuO + H2 = Cu2O + H2O 5) 4Zn + 10HNO3 = 4Zn(NO3)2 + NH4NO3 + 3H2O 6) CuO + H2 = Cu + H2O
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