... (B + 71)y = 5,94 15 2x + 2y = 0 ,12 => x + y = 0,06 Khi lng mui khan gm A(NO3)2 v B(NO3)2 m = (A + 124 )x + (B + 124 ) y = Ax + By + 124 (x+y) = 1,68 + 124 x 0,06 = 9 ,12 (g) *Cỏch gii nhanh: p dng ... thy phõn mol este cn 120 g NaOH hay 120 = 3( ol ) m ) 40 Este c to bi ru ln ru t CTTQ ca este l (RCOO)3 R' PTP (RCOO)3 R' +3NaOH 3RCOONa + R' (OH)3 120 g (R +67) g 3g 7,05g 120 x 7,05 = (R +67) ... nguyờn dng y 2x +1 12x + y = 27 x y 15 loi tha Vy R l C2H3 hay CH2 = CH * Tỡm R' C (71,3 +R') g este cn 120 g NaOH 6,35g 3g R' = 41 R' l gc HC no húa tr nờn CnH2n - = 12n +2 -1 = 41 n = CT...