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A+Cl2=B+HCl
B+NaOH=C+NaCl
C+CH3COOH=CH3COOC2H5+H2O


Răspuns :

CH3-CH3 + Cl2---> CH3-CH2Cl+ HCl
CH3-CH2Cl+ NaOH---> CH3-CH2OH+ NaCl
CH3-CH2OH+CH3COOH---> CH3COOCH2CH3 + H2O