CH3-CH2-CH2-COOH(C4H8O2)
CH3-CH(CH3)-COOH(C4H8O2)
CH3-CH2-COOH(C3H6O2)
ответ:изомерны CH3-CH2-CH2-COOH и CH3-CH(CH3)-COOH
CH3-CH2-CH2-COOH(C4H8O2)
CH3-CH(CH3)-COOH(C4H8O2)
CH3-CH2-COOH(C3H6O2)
ответ:изомерны CH3-CH2-CH2-COOH и CH3-CH(CH3)-COOH