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Giúp mình với mình cần gấp Bài 1: Phân loại và gọi tên các oxit sau: CaO, SO3 , P2O5 ,Fe2O3 , BaO , SO3, MgO? Bài 2: Viết phương trình phản ứng cháy của các chất: H2 , CO , Mg , Cu , AL, C,S,P trong Oxi? Bài 3: Trong các CTHH sau , CTHH nào là của Oxit: SO2 , CH4O, CO2 , NaOH , P2O5, Fe3O4, Al2O3?
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Các câu hỏi liên quan

Part 1. Choose the best option (A,B,C or D) to complete the following sentences. 1. My classroom is on the first ………. A. grade B. class C. school D. floor . 2. Every morning, Nam gets up at half past five. He ………his teeth at a quarter to six. A. washes B. brushes C. cleans D. has 3. The museum is..................... the temple and the movie theater. A. between B. next C. front D. opposite 4. Pick out the word whose underlined is pronounced differently. A. take B. math C. game D. table 5. We have math ……… one……….a quarter to two. A. from - to B. from - at C. to- at D. at - to 6. Nam gets .................... six o'clock. A. down at B. down on C. up at D. up on 7. We eat lunch in a small ………………….. A. bookstore B. restaurant C. drugstore D. movie theater 8. Nam:……………do you have geography? Tim: We have it on Tuesday. A. What time B. When C. Where D. What 9. The bookstore is to the ……………….of the toystore. A. front B. opposite C. right D. behind 10. There is a lake …………..my house. A. left B. between C. near D. next 11. Tìm một lỗi sai trong bốn phần được gạch chân. He has breakfast then go to school every morning. A B C D 12. How many …………does your school have? A. teacher B. table C. floor D. classrooms 13. What color ………… her eyes? A. have B. is C. has D. are 14. Mr. Minh is a weight lifter, so he is ………… . A. tall B. heavy C. thin D. small 15. I need …………peas. A. a bottle of B. a tube of C. a can of D. a kilo of 16. Pick out the word whose underlined is pronounced differently. A. life B. like C. night D. fish 17. There are five ……………. on each hand. A. toes B. fingers C. legs D. arms 18. Nam: ………….. is the matter, Hoa? Hoa: I’m cold. A. Which B. How C. Where D. What 19. Lan's hair isn’t short. It is ………… . A. full B. light C. long D. tall 20. Chicken is my favorite …………… . A. food B. meal C. drink D. lunch 21. Ba: What would you like ? Nam: I’d like …….milk. A. any B. some C. a D. an 22. Storekeeper: How ………….. eggs do you want? Nam: A dozen, please. A. any B much C. some D. many 23. Mai: How …………. is a sandwich? Salesgirl: It’s 2,000 dong. A. any B. some C. much D. many 24. Chọn từ có trọng âm chính nhấn vào âm tiết có vị trí khác với ba từ còn lại. A. apple B. onion C. banana D. chocolate Part 2. Put the verbs in brackets into the correct tense or form. 1. I (be) …..…….. a student. 2. My sister (get) ………….. up at 6 every day. 3. We (not/ have) ………………….. math on Fridays. 4. It’s half past five, (Mr. Quang / drive) ……………………………... to the farm? 5. Nam's house (have ) ……………..a big yard. 6. (Mai and Hoa/ go) …………………….………..to school on Saturday? 7. Tuan ( not, listen) ……………………..to music after school. 8. Mai (be) ……………..….a new student in class 6F. 9. My mother and father (not, be)……………..……….doctors. 10. This is a door . Those (be) …………………..……windows. 11. My father (listen)……………………………...…… to the radio now. 12. Where is your mother? - She (have)................................ dinner in the kitchen. 13. Mr. Nam (not, work) ……………….……… on Sunday. 14. The students (not, be) ……….………..in class at present. 15. She always (brush) ……………….….. her teeth after meals. 16. The children(play) ………………….. in the park at the moment. 17. My mother (cook) ………………a meal now. She ( cook) ……………every day. 18. She (wash) …………………………… her face in the morning. 19. Look! The bus (come) .............................................. 20. Ba and I (be).................................students. cac ban giup minh vote 5* va cho 40 d phai lam het nha ^_^

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