... phn ng Na Cụng thc cu to ca X1, X2 ln lt l: A CH3-COOH, CH3-COO-CH3 C H-COO-CH3, CH3-COOH 50 51 B (CH3)2CH-OH, H-COO-CH3 D CH3-COOH, H-COO-CH3 ( THI C KHI A 2008) Hp cht hu c mch h X cú cụng thc ... ba mui ú l: A CH2=CH-COONa, CH3-CH2-COONa v HCOONa B HCOONa, CHC-COONa v CH3-CH2-COONa C CH2=CH-COONa, HCOONa v CHC-COONa D CH3-COONa, HCOONa v CH3-CH=CH-COONa ( THI H KHI A 2009) Cho s sau (cỏc ... cu to thu gn ca X l A HO-C6H4-COOCH3 B CH3-C6H3(OH)2 C HO-CH2-C6H4-OH D HO-C6H4-COOH ( THI H KHI B 2009) 88 Khi thc hin phn ng este húa mol CH 3COOH v mol C2H5OH, lng este ln nht thu c l 2/3...