... ca m l A 73,4 B 77,6 C 83,2 D 87,4 X: AlaGlyAlaValGlyVal (a mol) 2Ala ( 2a mol) + 2Gly ( 2a mol) + 2Val Y: GlyAlaGlyGlu (b mol) Ala (b mol) + 2Gly (2b mol) + Glu 2a + b = 28, 48 : 89 = 0,32 a ... cng h a tr cú cc Chn A Cõu 30: Cho X l hexapeptit AlaGlyAlaValGlyVal v Y l tetrapeptit GlyAlaGlyGlu Thy phõn hon ton m gam hn hp gm X v Y thu c amino axit, ú cú 30 gam glyxin v 28,48 gam alanin ... dch Ba(HCO 3)2 l: A HNO3, NaCl v Na2SO4 B HNO3, Ca(OH)2 v KNO3 C NaCl, Na2SO4 v Ca(OH)2 D HNO3, Ca(OH)2 v Na2SO4 PTHH: 2HNO3 + Ba(HCO3)2 Ba(NO3)2 + 2CO2 + 2H2O Ca(OH)2 + Ba(HCO3)2 CaCO3 + BaCO3...