... gia PEN - M: Môn Hoá h c (Th y V Kh c Ng c) D ng phi kim 2 ,5 NaBr 103.2 ,5. 100% Gi s h n h p g m %mNaBr 3, 7% 103.2 ,5 150 .44 ,5 44 ,5 NaI áp án: 3,7% Ví d 3: Cho 31,84g h n h p (NaX, ... mol Na X p m t ng = 108 – 23 = 85g 25, 5 0,3mol gi thi t: m t ng = 57 ,34 – 31,84 = 25, 5g 85 31,84 M hon hop 106,13 NaBr (103) 0,3 NaI ( 150 ) áp án C nhon hop Ví d 4: Cho dung d ... MnCl KClO3 du mhon hop 122,5a 158 b 14,38 g a 0, 004mol nc 6a 5b 4.0, 06 2.0, 15 b 0, 006mol 158 .0, 06 100% 65, 9% %mKmnO4 14,38 áp án B Ví d 7: Nung...