... Dựng Br2 CCl4 phõn bit hai andehit : - CH2=CH-CHO lm mt mu Br2 CCl4 : CH2=CH-CHO + Br2 CH2Br-CHBr-CHO - HCHO khụng lm mt mu Br2 CCl4 Cỏc phng trỡnh phn ng: [C6H7O2(OH)3]n + nHONO2 [C6H7O2(OH)2(ONO2)]n ... trờn mu vt l: V = V ' - V = [3,14 (2,54)2 20,08] - [3,14 (2,5)2 20] = 14,281(cm3) Khi lng Ni cn dựng : m = V.D =14,281.8,9 = 127 ,101 (gam) T biu thc ca nh lut Faraay: AIt m.96500.n 127 ,101.96500.2 ... phn l : 7,1 3,55 gam * t chỏy phn : 7, 2, 25 0,175 mol ; nH 2O 0 ,125 mol 44 18 p dng nh lut bo ton nguyờn t: mphn = mC + mH + mO=3,55 gam nCO2 0,25 mO 3,55 12. nCO2 2.nH 2O 3,55 12. 0,175...