October 2021 1 12 Report
визнач ступені окиснення атомів елементів у сполуах, формули яких:
N2, NO2, NO, N2O5, N2O, N2O3;
MnSO4, MnO2, Mn2O7, Mn2O3;
As2O3, AsH3, H2, H2O;
Cl2O7, Cl2, Cl2O, O2, Cl2O5, Cl2O3.
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