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demonkarrang
2 năm trước
Bài 1: phân hủy hoàn toàn 27,56g KMnO4 thì thu được bao nhiêu lít khí O2 Bài 2: Đốt cháy hoàn toàn 3,36 lít CH4(đktc). Tính Vkk cần dùng cho phản ứng biết Vkk=5.O2
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Các câu hỏi liên quan

1. After the car crash last night, all the injured ______ to the hospital in an ambulance. A. were rushing B. was rushed C. was rushing D. were rushed 2. In our hospital, patients ______ every morning. A. are examined B. were examining C. have examined D. can examine 3. The problem is believed ______ at the meeting two days ago. A. being discussed B. to have been discussed C. to have discussed D. having been discussed 4. All my homework ________ before my father returned last night. A. was finished B. have been finished C. had been finished D. had finished 5. The manager had his secretary ______ the report for him. A. to have typed B. typed C. type D. to type 6. My father is said _______ from a serious disease last month. A. to suffer B. to have suffered C. suffered D. suffering 7. Could you please get John _________ us to Lan's house tomorrow afternoon? A. take B. taken C. to take D. taking 8. Our teacher is going to make us _________a tape. A. listen to B. listened to C. to listen to D. listen 9. They are having their house _______ by a construction company. A. to paint B. painting C. being painted D. painted 10. He said that his homework _______ at that time. A. was doing B. did C. was being done D. is being done 11. I am having my computer _______ for error by Bill. A. checked B. check C. to check D. checking 12. We are going to have our house _______ next weekends. A. paint B. to have painted C. have painted D. painted 13. All the main streets in this city _______ now. A. are being widened B. were being widened C. widen D. are widening 14. Mr. Green was reported _______ in the accident. A. died B. die C. to have died D. to be died 15. I don't understand why the students didn't keep silent while the speech _______. A. has been made B. was made C. would be made D. was being made 16. That book ________ by a famous author. A. wrote B. was written C. is writing D. has written 17. The Browns were rumoured _______ their house because of heavy debt. A. to sell B. sell C. sold D. to have sold 18. Understandably, her friends _______ when Julia married someone else after being engaged to John for two years. A. were surprised B. are surprising C. surprised D. will be surprised 19. My wedding ring _______ of yellow and white gold. A. is made B. is making C. made D. make 20. She could easily _______ for a top model. A. be mistaken B. have mistaken C. been mistaken D. to be mistaken 21. Different styles of jeans _______ to match the 1960’s fashions. A. designed B. are designed C. were designed D. had designed 22. The application form _______ to the university before May 31st. A. must send B. sent C. must be send D. must be sent 23. Do you get your heating _______ every year? A. checking B. check C. be checked D. checked 24. They had a boy _______ that yesterday. A. done B. to do C. did D. do

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