Помогите плз дам 50 баллов!!!!
3. Решите уровнение:
1. Cu + O2 = CuO
2. HCl = H2 +Cl2
3. Ag2O + C = Ag + CO2
4. NaOH + HNO3 =
5. H2 + CuO =
6. Ag2O =
7. MgO + HF =
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