August 2022 1 10 Report
Найдите в списке веществ CaO, O2, NaCl, H2S, H2, HNO3, Fe, CaC2 оксид.

Его степени окисления соответственно равны:

+1, +5, -2

+1, -1

+1, -2

+2, -2
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