user-avatar
hiennguyenthimai123
2 năm trước
1. Đốt chát hoàn toàn 30,4 gam hỗn hợp A gồm Mg và Cu cần vừa đủ 6,72 lít O2 ở đktc. Tính khối lượng mỗi kim loại trong A. 2. Đốt cháy hoàn toàn 29,6 gam hỗn hợp A gồm sắt và đồng cần vừa đủ 6,72 lít O2 ở đktc. Tính khối lượng mỗi oxit thu được.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Exercise 1. Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. 1. A. application B. combustion C. navigation D. recognition 2. A. computer B. communication C. command D. complicated 3. A. advanced B. automated C. constructed D. reunited 4. A. arrangement B. application C. activate D. assistance 5. A. potential B. production C. promotion D. psychology Exercise 2. Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions. 6. A. machine B. robot C. human D. fiction 7. A. applicable B. automation C. artificial D. evolution 8. A. algorithm B. exterminate C. intelligence D. technology 9. A. capable B. robotic C. industry D. futurist 10. A. assembly B. interfere C. reunite D. resurrect Part II. VOCABULARY Exercise 3. Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. 11. High intelligent machines can be automated to operate without human ____. A. intervene B. intervening C. intervention D. interventionist 12. The old astronomer patiently made his ____ and wrote down what he saw. A. observation B. observatory C. observe D. observer 13. One of the popular____used in smartphones at present is voice recognition. A. applicant B. applicable C. applications D. apply 14. If there are aliens out there, do you think they are much more____ advanced than we are? A. technological B. technologically C. technology D. technologies 15. ____have announced that a major breakthrough has been made. A. Research B. Researchers C. Researches D. Researching 16. I wish you would ____ the TV and go outside and get some exercise. A. call off B. give off C. put off D. turn off 16. Scientists are trying to ____ out the ways to reduce pollution from aircraft. A. break B. call C. turn D. work 17. I'll____ you ____ you to our research department. Please hold on. A. put - away B. put-out C. put-through D. put - up 18. No wonder the vacuum cleaner isn't working. You haven't____it ____. A. brought-in B. given - in C. plugged - in D. pulled - in 19. Whoever ____ up with that idea should have won the Nobel Prize. A. came B. caught C. kept D. put 20. Ten million text messages are sent on ____ every minute. A. account B. average C. common D. general 21. Astronomers have____a new planet outside our galaxy. A. invented B. unearthed C. developed D. discovered 22. ____is a type of book or film showing space travel of life on other planets, based on imagined scientific discoveries of the future. A. Epic B. Fiction C. Non-fiction D. Science fiction 23. Unluckily, David's dangerous and incredible journey in search of the Blue Fairy isin____. A. advance B. danger C. end D. vain 24. Most scientists believe that the day when robots become part of our lives will come____. A. from time to time B. more or less C. sooner or later D. later than never 25. Do you know who____the fact that sound travels in waves? A. developed B. discovered C. found D. invented 26. I'm thinking of getting a fax ____. A. engine B. instrument C. machine D. motor 27. The ____ of the outbreak of the disease is still unknown. A. aim B. cause C. motive D. reason 28. GPS systems help a lot of people ____ on land, on the sea, and in the air. A. inform B . interfere C. navigate D. reunite 29. After the power failure last night, the washing machine started to ____, so I had towash the clothes by hands. A. make noise B. malfunction C. operate D. work

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team