Ngày tải lên :
07/09/2014, 14:45
... Fe + 2HCl FeCl2 + H2 (a+2b) 2( a+2b) (a+2b) FeCl2 + 2NaOH 2NaCl + Fe(OH )2 Trn Hng Hng Giỏo ỏn dy thờm Húa THCS Lờ Li Nm hc: 20 13 -21 14 (a+2b) Theo bi ta cú : 56a + 160b = 13, 2( a + 2b) ... tp:5-6, 3-11, 3 -21 , 2- 54, 4-58, 3-60, 6- 72, 7- 72, 8- 72, 1.3, 3.3, 15.11, 19.4 Bi a) Lm th no tinh ch N2 t N2 cú ln cht l CO2 ,CO ,O2 ? b) Tỏch riờng khớ CO2 hn hp gm CO2 , N2 , O2 , H2 c) Tinh ch ... 1-6, 2- 6, 4-6, 1-19, 1 -21 , 1 -25 , 3-33, 2- 41, 3-51, 4-60, 2- 69, 4- 72, 3.1, 3 .2, 15.6, 15.13, 15.18, 19.5,1-11, 5 -21 , 1-30, 3-41, 4-51, 4-69, 1-71, 2. 3, 18.3, 19.3, 19.9, 22 .6,3-6, 3 -27 , 1-43, 2- 51,...