Hòa tan 16,6g hh A gồm Fe và Al trong 200 ml H2SO4(d=1,05g/ml) dư. Sau phản ứng thu được 11,2 l khí ở đktc và dd B. a)Tính C% các chất trong dung dịch B biết axit lấy dư 10% so với phản ứng. b) Cho dd B tác dụng hoàn toàn với 600ml NaOH 2M. Tính khối lượng kết tủa thu đc. Giúp mk bài này với

(a^2+b^2+c^2)-(a^2-b^2-c^2) (A+b+c+d)^2+(a+b-c-d)+(a+c-b-d)^2+(a+d-b-c)^2

Câu 2 g và h và câu 3 a giúp mình nhé

viết một đoạn văn bằng tiếng anh với chủ đề bất kì nhưng trong đó phải sử dụng các từ: deal,cope, suffer,protest,rely,suggest,involve,aford,dserve,look forward phải sử dụng ít nhất 5 từ trở lên.

20 điểm câu trắc nghiệm và vote 5* bạn nào giải nhanh nhất, giải chi tiết ngắn gọn vì sao chọn đáp án ấy ?

Cho A= 11...1 ( n chữ số 1 ) 22...25 ( n + 1 chữ số 2 ) Chứng minh là số chính phương Vote 5 sao ạ

17. He did some odd jobs at home__________. A. disappointment B. disappointedly C. disappointed D. disappoint 18. “I have bought you a toy. Happy birthday to you!” –“__________” A. What a lovely toy! Thanks. B. Have a nice day! C. The same to you! D. What a pity! 19. “ Your hairstyle is terrific, Cindy” – “__________” A. It’s nice B. You’re welcome C. Not at all D. Thanks, Peter 20. When students finish the secondary education, they have to take a(n)__________called GCSE. A. check B. examination C. interview D. test 21. I spoke very slowly __________he didn’t understand English very well. A. to B. so that C. because D. so 22. When being interviewed, you should concentrate on what the interviewer is saying or asking you. A. be related to B. express interest in C. be interested in D. pay attention to 23. “ I’m going away tomorrow, mother.”_ Leo told his mother that__________away the__________. A. he was going / following day C. I was going / day after B. I’m going / day after D. he’s going / following day 24. “ It was nice of you to give me the present. Thank you” Ben said to Mary. _Ben thanked Mary__________the present. A. of giving him C. for giving him B. it had been nice of her to give him D. that she had been nice to give him 25. Shakespeare wrote “ Romeo and Juliet” in 1605. A. “ Romeo and Juliet” were written by Shakespeare in1605 B. “ Romeo and Juliet” was written by Shakespeare in 1605. C. “ Romeo and Juliet” was written in 1605 by Shakespeare. D. “ Romeo and Juliet” were written in 1605 by Shakespeare 26. The hurricane has totally destroyed the villages._ The villages__________by the hurricane. A. have been totally destroyed C. have totally been destroyed B. has been totally destroyed D. has totally been destroyed 27. If you don’t work much harder, you won’t pass the exam. _ Unless you__________much harder, you__________the exam. A. work / will pass B. don’t work / will pass C. don’t work / won’t pass D. work / won’t pass

Mọi người giúp mình với ạ😥😥😥

Viết 1 đoạn văn về nghề nghiệp mà em muốn làm ở tương lai Mong mn giúp mình ạ

7. This room__________since I was born. A. has been painted B. was painted C. painted D. has painted 8. What__________ you__________if you __________a billionaire? –I would take a trip into space. A. will/do / are B. would/do / were C. can/do/was D. shall/do / are 9. Have you seen the Titanic yet? _ No, I haven’t. I__________it next Saturday. A. would see B. will see C. am going to see D. see 10. After__________dinner, I often watch TV. A. ate B. eat C. eaten D. eating 11. Tom said that he __________his motorbike the day before. A. had lost B. lost C. has lost D. lose 12. Do you believe__________God? A. at B. of C. about D. in 13. Air and water are necessary__________us. A. of B. for C. with D. to 14. The beautiful woman has a busy__________life. A. society B. socialize C. social D. socializing