Объяснение:

1. CH4 +Cl2 → Ch3Cl + HCl

2. CH3Cl + H2O→ CH3OH + HCl

3. Ch3OH + CuO → HC=O + Cu↓ + H2O

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H

4. HC=O + 2Cu(OH)2 → HC=O + Cu2O↓ +2H2O

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H OH