C → CH4--> CH3Br→ CH3OH-->CH3COOH осуществите превращения
CH4-CH3Br-CH3OH-HCOH CH4+Br2=CH3Br+HBr CH3Br+H2O=CH3OH+HBr CH3OH=HCOH+H2 CH3COH-CH3COOH-CH3COONa CH3COH+H2O=CH3COOH+H2 2CH3COON+2Na=2CH3COONa+H2