В перечисленных формулах расставить степени окисления всех элементов:
Cl2O7, V2O5, SF6, SO3, SrO, Ag2O, CuO, FeO, PbO2, HgO, P2O3, K2O, CaBr2, Mg3P2, NH3, CaH2, H2O2, AlF3, Mn2O7, CrO3.
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