... CH3 - CH = CH - CH3. B. CH2 = CH - CH2 - CH3.C. CH2 = CH - CH3. D. CH2 = C(CH3)2.Câu 31: C«ng thøc cÊu t¹o cña alanin lµA. H2N-CH2-COOH. B. CH3-CH(NH2)-COOH.C. C6H5NH2. D. H2N-CH2-CH2-COOH. ... 6: Cht va tỏc dng vi Na, va tỏc dng vi NaOH lA. CH3 - CH2 - CH2 - COOH. B. CH3 - CH2 - COO-CH3.C. CH3-COO- CH2 - CH3. D. HCOO-CH2 - CH2 - CH3.Cõu 7: Nha phenolfomanđehit c iu ch bng cỏch un ... gam C. 11,16 gam. D. 13,95 gam.Cõu 19: Trong s cỏc loi t sau:[-NH-(CH2)6-NH-OC-(CH2)4-CO-]n (1).[-NH-(CH2)5-CO-]n (2).[C6H7O2(OOC-CH3)3]n (3).T thuc loi poliamit l A. (1), (2), (3). B. (1),...