Ch3coona-> ch4-> ch3br -> a -> h2co-> a-> ch3-o-ch3-> co2-> co-> a решить

CH3-COONa+NaOH(t) -> CH4+Na2CO3
CH4+Br2(t)-> CH3Br+HBr
CH3Br+KOH -> CH3OH+KBr
CH3OH +O(k) -> H-COH+H2O
H-COH+H2-> CH3OH
2CH3OH(t) -> CH3-O-CH3+H2O
C2H6O+3O2(t) -> 2CO2+3H2O
CO2+C(t) -> 2CO
CO+2H2(t,k) ->CH3OH