Задание 1: Определите степень окисления элементов В следующих соединениях: КСЮ3, НСЮ,, Ca(HCO3), , О, O, , (NH4)2Cr,O,, NaNO2, H,SeO3, K,S, CuSO4, MgSiO3, KMnO,​
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