Viết pthh thực hiện sơ đồ chuyển hóa sau: a)Fe+--->FeCl2+--->FeCl3--->Fe(OH)3--->Fe2O3 b)Fe+--->FeCl3+--->FeCl2+--->Fe(NO3)2+-->Fe

Các câu hỏi liên quan

II. Vocabulary and Grammar (4pts) 1. ____________ being frightened by the images, Lan still liked the film so much. A. In spite B. Despite C. Although D. Nevertheless 2. __________ the story of the film was good, I didn’t like the acting. A. Because B. Since C. As D. Although 3. The play was so boring. ________, An saw it from beginning to end. A. Therefore B. Despite C. However D. Although 4. – “Do you like seeing a film?” – “_________________” A. No, I don’t like it at all B. Sure. What film shall we see? C. Who is in it? D. I’m sorry, I can’t. 5. ____________ is La Tomatina celebrated? – Every August. A. Where B. Why C. When D. Which 6. My father liked the ____________ of that singer. A.perform B. performer C. performance D. performing 7. ____________ is not very far from here to the harbour. A.There B. It C. This D.That 8. This time tomorrow , I ..............on the train to Ha Noi. A. Will be sitting B. am sitting C. sits D. were sat. 9. Nam used to ________ morning exercise when he got up early. A. did B. does C. doing D. do 10. My father __________the bus to work every day, but I cycle. A. catches B. drives C. goes D. runs 11. I go to school __________ bike. A. by B. on C. in D. from 12. Traffic accidents can be prevented if people __________ the rules. A. remember B. obey C. go after D. take care of 13. You should look right and left when you go ________the road. A. down B. across C. up D. along 14. Bus is the main public ________in Viet Nam. A. travel B. tricycle C. transport D. vehicle 15. The play was so boring. ________, Hoa saw it from beginning to end. A. Therefore B. Despite C. However D. Although 16. She’s sure that they will find the film_________. A. entertaining B. entertain C. entertainment D. entertained