Giúp mik ý b yêu cầu cb ko chép lời giải trên mạng rồi quăng đáp án vào đây câu điểm

Hỗn hợp X chứa 21,4 gam hỗn hợp gồm ancol propylic và phenol tác dụng hết với Na dư thì thu được 3,36 lít khí H2 (đktc) a/ Xác định % khối lượng của các chất trong X b/ Cho 21,4 gam X phản ứng hết với dung dịch NaOH 0,2M . Tính thể tích dung dịch NaOH đã dùng

E hãy viết một đoạn văn sau khi học xong bài “ bài học đường đời đầu tiên “ “ bức tranh của em gái tôi” Tả tình cảm bác hồ thương bộ đội dân công Tình cảm ah đội viên đối vs bác

phân tích đa thức thành nhân tử:x4+23x3+x2-46x-6

ko dùng máy tính hãy so sánh A=10^2016+2017/10^2017+2018 và B=10^2017+2018/10^2018+2018 2018

Chủ đề trải nghiệm sáng tạo: nếu tôi là hiệu trưởng - Thế nào là ngôi trường mơ ước - Nếu được chọn làm hiệu trưởng ngôi trường ấy em sẽ làm gì? Vì sao em chọn điều đó? - Em sẽ làm gì để dự định đó thành sự thật ( nhớ tl hết giùm em nha, em cảm ơn nhiều ạ)

Mọi người giúp em với, em cần gấp lắm ạ I. Complete the second sentence so that it has the similar meaning to the first one. 1. Many people now speak English as a second or foreign language. For many people, English is not__________________________________________ 2. Most husbands didn't do any housework in the past. Nowadays, most of them often share housework with their wives. Most husbands_______________________________________________________ 3. I’m going to attend a summer camp next week. I plan_______________________________________________________________ 4. The child doesn’t talk to you because you look serious. The child would______________________________________________________ 5. Tourists throw trash in the places they come to, which will make the places polluted. If__________________________________________________________________ 6. They will have to repaint the house. The house___________________________________________________________ 7. More families will use dish washers in the corning years. Dish washers_________________________________________________________ 8. By the end of this week, my father will have bought a new vacuum cleaner as a gift for my mother. By the end of this week, a new vacuum cleaner______________________________ 9. It takes a long time to leam a foreign language. We spend___________________________________________________________ 10. In spite of her dream to become a singer, her parents force her to study Economics. Although____________________________________________________________ 11. This is the first time he goes abroad. He hasn’t___________________________________________________________ 12. Can’t you find a better hotel? Is this _____________________________________________? 13. You are not permitted to smoke in the main hall. Smoking is__________________________________________________________ 14. The last time she had a break was 2 years ago. She hasn’t___________________________________________________________ 15. "How about going to the cinema tonight?", said Tom. Tom suggested_______________________________________________________ 16. Five students will be awarded a present. Their test results are excellent. Five________________________________________________________________ 17. Although Nam is very good with numbers, I still think that he is not suitable for a job as an accountant. In spite of the fact that__________________________________________________ 18. Working as a salesman for this company might give you a lot of chances to travel abroad. lf you_______________________________________________________________ 19. In the past, students only learned what teachers provided them. Nowadays, students are expected to self-study a lot. Students_____________________________________________________________ 20. "Why don't we share the cost of the tour?" said my friend. My friend suggested___________________________________________________ 21. Although he couldn't draw beautifully, he still wanted to become an artist. Despite_____________________________________________________________ 22. My grandfather is 73 years old now. He does exercise every day to keep fit. My grandfather_______________________________________________________ 23. I didn’t pass the exam. Lack of practice is the reason for that. Lack_______________________________________________________________ 24. I went to the zoo last week and that is where I saw a real tiger for the first time. Before I_____________________________________________________________ 25. Everyone heard about your trip before I did. I was the____________________________________________________________ 26. I work in this building. This building is the tallest one in the city. The building_________________________________________________________ 27. She is still not satisfied with her husband even though he fully supports her in doing housework. In spite of___________________________________________________________ 28. Although her height is limited, she wishes to become a famous model. Despite_____________________________________________________________ 29. Working long hours or working overtime is not a problem to him. He doesn't___________________________________________________________ 30. Alice made a mistake in her homework. She remembered it. Alice remembered_____________________________________________________

Từ M nằm ngoài (O) vẽ 2 tiếp tuyến MP,MQ và cát tuyến MAB.Gọi I là trung điểm AB a,CM tg PIOQ nội tiếp b,PQ cắt AB tại E.CM MP^2=ME.MI c,Qua A kẻ đường thẳng song song với MP cắt PQ,PB lần lượt tại H và K Cm KB=2HI GIÚP MÌNH CÂU C VỚI

Cho 0,94 gam hỗn hợp hai andehit đơn chức no kế tiếp nhau trong dãy đồng đẳng cho tác dụng hết với dung dịch AgNO3/NH3 thu được 3,24 gam Ag . Xác định công thức phân tử hai andehit và tính % khối lượng của chúng .

Nhận biết các dd mất nhãn: 1. H2SO4, HCl, NaOH, Na2SO4, HNO3 2. K2SO3, K2SO4, K2S, KNO3 3.H2S, H2SO4, HNO3, HCl