GIẢI HỘ MÌNH VỚI MÌNH NGHĨ MÃI MÀ NÓ KO RA

Mn giúp mik bài 5 với ạ mik đang cần gấp

Giúp mình với ạ, hứa vote 5* và câu trả lời hay nhất

Hòa tan 9,4 g kalioxit(K2O) vào nước ta được 200ml dung dịch A a) Viết PTPƯ và tính Cm của dung dịch A b) Tính khối lượng của dung dịch Axitsunfuric(H2SO4) 19,6% cần để trung hòa dung dịch A nói trên Giúp vs ạ càng nhanh càng tốt ạ

underline the correct words in the sentences

18. Oxford University is the most ancient university in Britain. TÌM TỪ ĐỒNG NGHĨA A. biggest B. youngest C oldest D. most famous 19. Home appliances have changed very much during the past few years. A. devices B. toys C. machine D. furniture 20. After a long working day, I want to stay in my comfy bed and watch my favourite channel. A. warm B. comfortable C. large D. soft 21. The development of cities is becoming faster and faster and this causes wildlife animals’ homes disappear. A. reason B. make C. do D. purpose 22. Everyone can save power by unplugging the home appliances when they’re not in use. A. turn in B. switch on C. switch off D. turn on 23. I think robots now cannot do complicated things or communicate with people. A. easy B. difficult C. simple D. uncomplicated 24. One of the best things about robots is their ability to do jobs that would be just dangerous for people. A safe B. risky C. secure D. safety 25. Their funny stories make us laugh a lot. A. amusing B. lovely C. cute D. reliable 26. We organize expensive furniture carefully. A. act B. show C. watch D. arrange 27. Try' to be quick! We're late already. A. slow B. fast C. long D. short 28. Our city was polluted with the exhaust fumes emitted from vehicles. A. clean B. populated C. popular D. dirty 29. She has walked almost 1,000 steps today. A. just B. over C. nearly D. fast 30. The Olympic Games are held every four years. A. carried B. taken C. brought D. organized 31. I'm not comfortable to live in my new house in the city center. It's crowded with-people. A. packed B. quite C. noisy D. many 32. When I came to Da Nang, I ate many local foods which are very delicious. A. national B. regional C. international D. provincial 33. Hopefully the tree will produce some blossom next year. A. trunk B. branch C. flower D. root

Chỉ hỏi cho 50đ nè: Đặt 2n^2 + 2021 = a^2; 3n^2 + 2020 = b^2 có a = 2k+1 thì 2n^2+2021 = 4k^2 + 4k đúng ko mn

Hydrogen là một chất tinh khiết, có công thức hóa học là H2O. Điều nào sau đây mô tả đúng nhất về hydrogen? Group of answer choices Nó là một chất được tao ra từ 2 nguyên tử của một nguyên tó Nó là một nguyên tố được tạo thành từ hai hoặc nhiều loại nguyên tử. Nó là một hợp chất chỉ được tạo ra từ một loại nguyên tử. Nó là một hợp chất được tạo ra từ hai hoặc nhiều loại nguyên tử.

Giúp em câu b Vd 4 với ah giúp em

34. As soon as we can afford it, we'll move to the suburbs. A. downtown B. countryside C. inner city D. outskirts 35. Hung can run very fast, so he was chosen to take part in the school running competition next month. A. rapid B. quick C. quickly D. soonly 36. I always want to come back to my cozy house whenever I have free time. A. cool B. warm C. hot D. comfortable 37. Solving that math problem was a piece of cake to me. I just needed two minutes. A. very hard B. very easy C. very delicious D. very cheap 38. Ngoc is very interested in watching cartoon on TV. A. fond of B. fed up with C. tired of D. sick with 39. If you are going out tonight, you will have to count me out. A. excluded me B. number me C. persuade me D. ask for my permission 40. He comes from a very wealthy family, so he has a lot expensive cars. A. rich B. traditional C. expensive D. Normal 41. In the United State, almost everyone, at one time or another, has been a volunteer. A. nearly B. hardly C. mostly D. scarcely 42. Americans have had the tradition of volunteering and helping one another since the early days of the country. A. something new and modern. B. something old and last long. C. something precious and rare. D. something common and cheap. 43. Going to the zoo is an exciting experience. You have a chance to look at a lot animals. A. very boring B. very interesting C. very uncommon D. very cheap 44. Ngoc is very different from her sister. She has dark hair and brown eyes. A. unlike B. similar to C. the same as D. like 45. Vietnamese spring rolls are very delicious so a lot of people like eating them. A. tasty B. salty C. sweet D. bitter 46. Pizza in the restaurant near my house is the best pizza I’ve ever eaten. A. hardest B. worst C. greatest D. softest 47. Oxford is one the most ancient universities in the world A. oldest B. most modern C. biggest D. best 48. Chu Van An was one of the most famous teacher in Vietnam. A. richest B. named C. located D. construct 49. You have to strictly obey traffic signals when riding on the road. A. catch B. follow C. see D. observe 50. Hoi An used to be a peace and quiet city. A. peaceful B. lively C. crowded D. noisy 51. “Captain America: Civil War” is so amazing. We couldn’t take our eyes off the screen. A. couldn’t stop watching B. couldn’t go to sleep C. couldn’t see the screen clearly D. couldn’t close the eyes 52. Critics say the film is shocking but it is must-see. A. a boring movie B. a highly-recommended movie C. a successful movie D. an interesting movie 53. Tet Holiday is the most important festival in Vietnam which takes place in late January or early February. A. appears B. occurs C. brings D. holds 54. Some people take naps after the feast with the whole family. A. play games B. go out C. go to sleep D. hang out