Câu 1. Cho hỗn hợp gồm 27,2 gam hỗn hợp Fe và Fe2O3 tác dụng với 500g dd HCl thu đuợc 57,9 gam muối. a) Tính % khối luợng các chất trong hỗn hợp đầu. b) Tính C% của dd HCl cần dùng Câu 2 :Khi cho m (g) Ca tác dụng hoàn toàn với 17,92 lit khí X2 (đktc) thì thu được 88,8g muối halogenua. a. Xác định công thức chất khí X2 đã dùng. b. Tính giá trị m.

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Ex1: Read and number the sentences in the correct order. It begins with 0. ________A: Bob: I lived in a small and pretty town near London. ________B: Miss Hien: And where do you live now in Ha Noi? ____0___C: Bob: Good morning, Miss Hien. I’m Bob from England. I’m your new pupil. ________D: Miss Hien: Hi, Bob. Nice to meet you. Where did you live in England? ________E: Bob: I live in a beautiful and quiet house near West Lake. Ex2: Order the words. 1; You / do / live / where/? => ____________________________________________________________________ 2: Your / is / what / address/? => ____________________________________________________________________ 3: Is / your / new / like / place / what/? => ____________________________________________________________________ 4: Hometown / what / is / your / like/? => ____________________________________________________________________ 5: Lives / city / a / he / crowded / in/. => ____________________________________________________________________ Ex3: Fill in the blank with a suitable word: “What, Who, How often, How much, How many, How, Which, Where, What time” 1:__________________is there to eat? - There is some meat. 2:__________________beef do you want? 3:__________________does she fly kite? - She never flies kites 4:__________________are those potatoes? - They are 5000 d 5:__________________do you go swimming? - Once a week 6:__________________students are there in the class? - 30 students 7:__________________is Ha’s nationality? 8:__________________old is your father ? 9:__________________grade are you in? 10:__________________does she live with? – She lives with her parents. 11:__________________does she live? – She lives at 50 Hang Dao street. 12:__________________do you go to bed? – At half past ten.