August 2022 1 38 Report
№4.

Определить степени окисления элементов в соединениях или ионах: CaH2, KOH, CH4, SiH4, H2O2, NO, Cl2O7, Na2MnO4, Na2Cr2O7, HClO4, KFeO2, SiO2, ZnO22-, PO43-, P2O74-, KHS, Mn2O7, NH4Cl, NH4NO3, [Cr(OH)6]3-
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