Đốt cháy hoàn toàn 0.3g chất hữu cơ A.Biết A chứa C,H,O và thu được 224 cm3 khí CO2(ĐKTC) và 0.18g nước.Lập CTPT chất hữu cơ A,cho MA=60

anh em giúp mk đáp án nhé. Mk sẽ vote 5 sao cho bạn làm làm chuẩn ko sai. Chỉ cần đáp án thôi ko phải viết lời giải đâu nhanh nhé

1. Cho P($x$) + Q($x$) = 2$x^{3}$ + $x^{2}$ +4$x$ P($x$) - Q($x$) = 3$x^{2}$ - 2$x$ -2 Tìm giá trị của $x$ sao cho P($x$) = Q($x$) 2. P($x$) = -$\frac{3x^{3} }{2}$ - 5$x$ + 2$x^{2}$ +1 Q($x$) = 5$x$ + $\frac{3}{2}$$x^{3}$ + 5 + $\frac{1}{2}$$x^{2}$ + $x^{4}$ a, Tìm M($x$) = P($x$) + Q($x$) b, Chứng tỏ rằng đa thức M($x$) ko có nghiệm

1. I would have visited you before if there _____ quite a lot of people in your house. A. hadn't B. hadn't been C. wouldn't be D. wasn't 2. If you had caught the bus, you _____ late for work. A. wouldn't have been B. would have been C. wouldn’t be D. would be 3. If I _____, I would express my feelings. A. were asked B. would ask C. had been asked D. asked 4. If _____ as I told her, she would have succeeded. A. she has done B. she had done C. she does D. she did 5. Will you be angry if I _____ your pocket dictionary? A. stole B. have stolen C. were to steal D. steal 6. You made a mistake by telling her a lie. It _____ better if you _____ to her. A. would have been/ hadn't lied B. would be/ didn't lie C. will be/ don't lie D. would be/ hadn't lied 7. John would be taking a great risk if he _____ his money in that business. A. would invest B. invested C. had invested D. invests 8. She wouldn't have given them all that money if we _____ her to. A. wouldn’t advise B. won't advise C. hadn't advised D. didn't advise 9. If the tree hadn't been so high, he _____ it up to take his kite down. A. could have climbed B. climb C. is climbing D. climbed 10. If the wall weren't so high, he _____ it up to take his ball down. A. climbed B. could climb C. is climbing D. climb 11. If I _____ her phone number, I _____ her last night A. had known/ could have phoned B. knew/ would have phoned C. know/ can phone D. knew/ could phone 12. If he ______ the truth, the police wouldn’t arrest him. A. tells B. told C. had told D. would tell 13. If you press that button what _____? A. would happen B. would have happened C. will happen D. happen 14. She says if she _____ that the traffic lights were red she _____. A. had realized/ would stop B. realized/ could have stopped C. has realized/ stopped D. had realized/ would have stopped 15. I am very thin. I think, if I _____ smoking, I might get fat. A. stop B. had stopped C. will stop D. stopped 16. If I _____ that yesterday, I _____ them. A. had discovered/ would inform B. had discovered/ would have informed\ C. had discovered/ could inform D. discovered/ can inform 17. If you _______ to the course regularly, they ________ a certificate last year. A. go/ gave B. go/ give C. had gone/ would have given D. went/ would give 18. I think he is not at home. If he _____ in, he ______ the phone. A. was/ answered B. were/ would answer C. were/ would have answered D. had been/ would have answered 19. If I ______ in London now, I could visit British Museum. A. were B. had been C. have been D. would be 20. If Columbus _______ money from Queen Isabella, he _______ across the Atlantic. A. do not receive/ could not sail B. had not received/ might not have sailed C. did not receive/ might not have sailed D. would not receive/ might not sail

trình bày suy nghĩ của em về đại dịch covid 19

hãy vẽ sanji đang hút thuốc lá phải thật ngầu vào

Giải giúp mình ĐẦY ĐỦ 2 bài này với ạ.Mình sẽ tick cho 5 sao và ctlhn nhé. Mình cảm ơn😍😍

Các bạn giúp mik nhé cảm ơn nhìu(trang đầu đọc,trang thứ 2 là trả lời câu hỏi)mong các bạn giúp

Giúp me với ạ😁😁😁😁😁😁😁😁😁

Một ôtô chuyển động trên đoạn đường thẳng. Trong 1/2 quãng đường đầu đi với vận tốc 30km/h , trong 1/2 quãng đường còn lại ôtô đi trong 1/2 thời gian đầu với vận tốc 54km/h và trong 1/2 thời gian cuối với vận tốc 36km/h. vận tốc trung bình trên đoạn đường là: