thực hiện chuỗi phản ứng sau a) I2->KI->KBr->Br2->NaBr->NaCl->Cl2 b) HBr->Br2->AlBr3->MgBr2->Mg(OH)2 c) Br2->I2->NaI->AgI

Em hãy viết đoạn văn có sử dụng ít nhất 3 cụm danh từ (gạch chân câu chủ đề và các cụm danh từ đó) M.n giúp mik với mai mik phải nộp rùi!

Cứu mk với làm ơn aaaaaaaaaaaaaaaaaaaaa : Trong văn bản Bức Tranh của em gái tôi - Tạ Duy Anh, nhân vật người anh đã có tâm trạng gì khi đứng trước bức tranh đạt giải nhất của người em ( Kiều Phương ) . Qua đó em rút ra được bài học gì cho bản thân ?

chủ trương bạo động chống pháp của phan bội châu có gì khác so với chủ trương bạo động của cần vương cuối thế kỉ xix

Bài 3: Tính khối lượng kali clorat ( KClO3 ) cần dùng để điều chế 6,72 lít khí oxi ( đktc ) Cho: K=39; O=16 ; Cl=35,5 Bài 4: Đốt cháy 9,72 g nhôm trong bình kín chứa 3,36 lít khí oxi ( đktc ) a/ Chất nào còn dư và dư bao nhiêu gam? b/ Tính khối lượng nhôm oxit thu được? Cho: Al=27 ; O=16 giúp e ạ

Trong khung dây của máy phát điện xuất hiện dòng điện xoay chiều vì: A. khung dây bị hai cực nam châm luân phiên hút đẩy. B. số đường sức từ xuyên qua tiết diện S của cuộn dây luân phiên tăng ,giảm. C. một cạnh của khung dây bị nam châm hút, cạnh kia bị đẩy. D. đường sức từ của nam châm luôn song song với tiết diện S của cuộn dây.

tìm BCNN của 3,4,6 giải thik chi tiết từng bước giải xong mik vote 5 sao

I. Give the meaning of these words WORD MEANING 1. Accommodation 2. Bury 3. Collapse 4. Damage 5. Disaster 6. Drought 7. Earthquake 8. Erupt 9. Eruption 10. evacuate 11. Forest fire 12. Homeless 13. Mudslide II.Choose the word having the underlined part pronounced differently in each line. 1. A. industry B. tornado C. natural D. injury 2. A. geography B. electronic C. scientific D. preparation 3. A. debris B. rainstorm C. destroy D. shelter 4. A. primary B. animal C. tropical D. volcano 5. A. climatology B. bibliography C. communication D. radiography III.Complete the sentences with the words in the box Avalanche, blizzard, disaster, drought, eruption evacuation, explosion, flood, lightning, tsunami 1. The soldiers have been deployed to help avert a looming environmental _ _____in central provinces. 2. When I was outside in the , I couldn’t see more than a few feet in front of me because of the snow. 3. Mum went shopping yesterday afternoon and she was very frightened. In the car park, there was an _______and nobody knew what it was. 4. I saw on TV that yesterday there was an on an island in the Pacific and hot lava came down the volcano. 5. My little sister is afraid of____________________, so when there is a bad storm she always hides. 6. Last Sunday we wanted to go skiing, but we couldn’t because in the mountains there was an . 7. Powerful earthquake off the coast in Indonesia sparked a three-metre-high________that killed at least 113 people. 8. If there is a bad in a town, the people have to travel by boat! 9. fter the harshest winter in decades, the western region is now facing its hottest summer and the worst across the area in nearly 40 years. 10. People should become familiar with the guidelines for _ because natural disasters can force them to leave their homes. IV.Give the correct form of the verbs in brackets to complete the sentences. 1. All people (go) down in the cellar for protection by the time the tornado (sweep)____ through the town yesterday. 2. Hundred of trees on streets in Ha Noi (fall) in a sudden storm last night. 3. I (not seen)_____a more horrible flood than this since I (live) _________________ in this area. 4. The tourists (camp) near a peaceful river, when all of a sudden, the river (flood)____________its banks and almost (destroy)_________________________their campsite. 5. When the volcano (erupt)__________, people living nearby already (move) _______ to safe places. V.Rewrite the following sentences in passive voice. 1. The mudslide buried five houses in a village in the eastern region. 2. The volunteers have rescued three cats. 3. They are cutting dead trees on some streets to prepare for the forthcoming storm. 4. We should move the furniture to higher places because of the flood. 5. They had repaired their house before the typhoon came. 6. What kind of injuries do earthquakes cause? 7. The government didn’t warn the people about the possibility of a tsunami. 8. Have the workers restored the damaged bridge yet? 9. I hadn’t put the car into the garage before the hail occurred. 10. We will send rescue workers to the flooded villages. _______________________________________________________________________

Đây là bài toán tỉ lệ thuận hay tỉ lệ nghịch vậy mấy cậu ơi

I. Chọn từ mà phần gạch chân có cách phát âm khác với các từ còn lại. 1. A. sure B. saw C. send D. sit 2. A. new B. sew C. few D. knew 3. A. image B. arcade C. take D. days 4. A. plays B. looks C. wants D. helps 5. A expensive B event C essay D except II. Chọn ý A, B, C hoặc D để hoàn thành các câu sau. 6. I bought this dress at the _____________ on Hang Bai street. A. clothes’ store B. store of closes C. clothes store D. closing store 7. Isn’t it easy to learn English well ? - _______________________________ A. No, it is B. No it does not C. Yes, it is D. Yes. It does 8. There are two restaurants in the town and _______________ of them are extremely old. A. each B. all C. both D. most 9. My funny story made the whole class ___________________ A. smile B. laughing C. laugh D. crying 10.Nam spends ___________ time playing video games. A. a few B. a little C. many D. any 11. Her sister prefers this book _______________ that one A. into B. than C. more than D. to 12. Lan did not know the world . Hoa didn’t ___________________________ A. so B. neither C. either D. too 13. The boss wants his ______________________ to type some letters. A. secretary B. novelist C. journalist D. musician 14. If he eats all that food, he eats ___________________ A. quite much B. too many C. quite many D. too much 15. Mr Robinson speaks Vietnamese very __________________ A. skillfully B. good C. fluently D. best III. Chia động từ trong ngoặc ở thì thích hợp. 16 + 17. Jonh (watch) ___________ TV when his friend (ring) _________ him up last night. 18+ 19. You (be) ____________ able to speak English better if you (learn) __________ harder. 20. How much time do you spend (watch) _____________ TV every day ? 21+22. Nam (not visit) ___ the museum with his class last Sunday because he (catch) ____ a cold. 23 + 24. Boys like (play) _____ marbles or catch while girls enjoy (skip) ______ rope or chatting. 25. Keep silent, please.Our teacher (explain) ______________ the lesson. IV. Điền một giới từ thích hợp để hoàn thành câu. 26. In a game of singles, two players play ________________ each other. 27. I’m not very fond ________________ detective stories. 28. Margarine is different ________________ butter. 29. His parents are very strict ________________ him. 30. Many people take part ________________ jogging every morning. 31. We’d like a walk instead _______________ riding a bike. 32. Huy is very good ______________ fixing things. 33. They study and listen to music _______________ the same time. 34. _______________ literature, we learn about books and write essays. 35. Will you be home ________________ dinner tonight? V. Sử dụng dạng đúng của từ trong ngoặc để hoàn thành câu. 36. Fruit juice and milk are very ____________ drinks for children. (HEALTH) 37. She has a lot of stamps in her ________________ (COLLECT) 38. Nam is the ____________ student in his class. (GOOD) 39. Mai is a good dancer so she dances very _____________ (BEAUTY) 40. We usually take part in many different ___________ at recess. (ACT) 41. This dictionary is very _________ for you to learn English. (USE) 42. There are many badminton ____________ nowadays. (COMPETE) 43. The nurse needs to know Hoa’s _______________. (HIGH) 44. English is an ____________ and important subject . (INTEREST) 45. Hoa is having a ____________ check-up. (MEDICINE)