Химия.................
C2H6 + Cl2 = C2H5Cl + HCl CH3-CH2Cl + H2O = CH3-CH2OH + HCl 2CH3-CH2OH = CH2=CH-CH=CH2 + 2H2O nCH2=CH-CH=CH2 = (-CH2-CH=CH-CH2-)n