April 2023 1 16 Report
Напишіть рівняння реакцій, які відповідають таким схемам:

а) O2 + ? → ZnO;
K + ? → K2O;
N2 + ? → NO;
б) CH4 + ? → CO2 + H2O;
CuS + ? → CuO + SO2;
Fe + ? → Fe3O4
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