... 20x 295 ,2 = 59, 04 (g) 100 59, 04 = 1,476 mol 40 = T (2) S mol CO2 tham gia phn ng vi NaOH l 0,2n n NaOH = 0,4n (mol) m NaOH = 0,4n x 40 = 16n (g) Theo ta cú phng trỡnh: 59, 04 16n 34 09, 56 ... Qung ụng Bi ging BD i tuyn HSG Huyn - Vựng Bc Nm hc: 2012 2013 - n Ba( HCO3) n BaCO = = 5,18 = 0, 02mol 2 59 1 ,97 = 0, 01mol 197 PTP: CO2 + Ba(OH)2 ... theo t l lng: 4 ,9 Xỏc nh CTPT ca A, bit t hi ca A i vi He l 19, 5 Hng dn mCO mH O = 4 ,9 nCO nH O = 4 ,9. 18 88, 2 = = 44.1 44 n n C H = 1 Cụng thc dn gin nht l: (CH)n MA = 19, 5 = 78 13n =...