cho 9 9g hỗn hợp gồm 1 kim loại M hóa trị 2 và 1 kim loại R hóa trị 3 tác dụng vs dd HNO3 vừa đủ thu đc dd A và 11,2l hh khí B gồm NO2, NO có tỉ khối với H2 là 19,8. Tính khối lg muối trong dd A

Mọi người giúp em bài này với ạ

Từ gợi ý :scared/movie Dùng từ gợi ý để viết một câu tiếng anh miêu tả nội dung bức tranh.

vẽ chibi anime conan yêu nhau ai buồn nói chuyện vs tui nhé

Đề:Vẽ lại và nhận xét cho mk pic dưới nha😊,giống 70%,đánh chì nha. NL:Các bn tìm thấy acc phụ của toi chx,acc này toi hem cày nx😔.Mk mới hc đánh chì nên nhận xét kĩ nha để toi còn sửa😬

a,b có thể ko làm nhưng phải giúp tui câu c

because the weather was too cold they had to cancel their picnic

tạo logo cho cho các blink,có kí tên đàng hoàng ai đang cô đơn ko,ns chuyện vs em ik

1. .....I came to see her yesterday, she was reading a book. A. While B. When C. After D. Before 2. She said that she had been doing her homework…..8 o’clock. A. for B. since C. about D. at 3. It’s better not to put…..things until tomorrow. A. off B. on C. down D. away 4. “Would you like to have dinner with me?” A. Yes, so do I B. Yes, I’d love to C. I’m very happy D. Yes, it is 5. “How do you do?” A. Not too bad. B. I’m well. Thank you. C. How do you do? D. Yeah, OK. 6. When young, I did not…..with my elder sister. A. fit in B. catch up C. go on D. keep down 7. “I’ve passed my driving test.” A. Congratulations! B. Do you? C. That’s a good idea. D. It’s nice of you to say so. 8. I hope this headache will…..soon. A. go out B. put away C. wear off D. pass away 9. "Could I have.....more sugar in my coffee, please?” A. few B. some C. many D. little 10. Blue.....you. You should wear it more often. A. suits B. matches C. fits D. goes 11. I wish you.....to the theatre last night, but you didn’t. A. would come B. had come C. was coming D. came 12. We have an obligation to help people who are.…. A. in need B. at poverty C. of shortage D. on problem 13. It’s said that he has..…friends of his age. A. few B. plenty C. a number D. a dozen of 14. It is.....to talk about a problem than to solve it. A. more easier B. easiest C. easier D. easy 15. Those interested in the post are requested to apply in..… A. person B. themselves C. direct D. face 16. I’ve bought some beer…..John drops in. A. unless B. if C. in case D. otherwise 17. After she had returned home, she.....herself a good dinner. A. cooked B. was cooking C. has cooked D. would be cooking 18. I'm tired.....hearing your excuses. A. about B. off C. at D. of 19. .....I were you, I would take a taxi to the airport. A. Even if B. If C. Unless D. When 20. Ann: “..... where the nearest post office is?” Linda: “Turn left and then turn right.” A. Do you tell me B. Will you say me C. Could you tell me D. Should you show me

cho a,b,c là độ dài ba cạnh tam giác có chu vi bằng 2 CMR: a^2+b^2+c^2+2abc<2