а) FeO+HCl=FeCl2+H2O
б) Cr2O3+2Al=2Cr+Al2O3
в) Mn2O7+H2O=2HMnO4
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а) FeO+HCl=FeCl2+H2O
б) Cr2O3+2Al=2Cr+Al2O3
в) Mn2O7+H2O=2HMnO4