совершить превращения CH3-CH2-CHO ------------->x1----------------> x2 -------------------->x3 -----------------> x4-----------------------> x5
1)CH3-CH2-CHO+Ag2O-->CH3-CH2-COOH+2Ag 2)CH3-CH2-CHO+Cl2-->CH3-CHCl-COOH+HCl 3)CH3-CHCl-COOH+NaOH-->CH2=CH-COOH+NaCl+HOH 4)CH2=CH-COOH+СH3OH-->CH2=CH-COOCH3+HOH 5)n(CH2=CH-COOCH3)-->(-CH2-CH-COOCH3-)n
