btap boi gioi 9 multiple choice)
Boi duong Anh8-(Multiple choice)
... late?” 89. I am enrolling ( for / in / to ) the activities for this summer . 90 .What ( could / can / do / may ) I do for you? 91 . ( scout / scouting / scoutting ) began in England in 190 7. 92 .Are ... vocation. 93 .( let’s / let / let’s us ) sing for peace. 94 .There is a theater ( around the corner / around corner / round corner ). 95 . It is the ( most / same / much / more ) as our...
Ngày tải lên: 03/08/2013, 01:28
chuyen de boi duong HS GIOI 9
... 2,64g Bài giải Để cân thăng bằng : m cốc X = m cốc Y ⇒ 18,2 = (0,06. 197 ) + mddHCl – 2,64 ⇒ m ddHCl = 9, 02 g ⇒ m HCl = (9, 02.14,6):100 = 1,3g ⇒ nHCl = 1,3: 36,5 = 0,036 mol < nBaCO 3 ⇒ Vô ... Ta có : m ddH 2 SO 4 = v.d = 9, 8g =>n = 0,1 Áp dụng ĐLBTKL: m Z = mH 2 SO 4 + m X – m Y ⇒ m Z = 1,8g . m Y = m cation + m so 4 2- = 13,6g ⇒ m cation = 13,6 – 9, 6 = 4g . ⇒ m R + m cation = ....
Ngày tải lên: 05/06/2013, 01:27
Ôn HS giỏi - multiple choice
... .................. A.fit B.fat C.fine D.fresh 42. Mr Brown .......................in the army from 196 0 to 198 0. A.had servedB.has served C.served D.is serving 43. Ther is a ......................shop ... other, we still......................... A.keep in touch B.say hello C.keep together D.keep on 9. Music and painting are ...................subjects. A.option B.optional C.optionally D.op...
Ngày tải lên: 06/07/2013, 01:26