Một hỗn hợp X gồm 2 chất hữu cơ đơn chức , mạch hở . Cho 35 gam X tác dụng với NaOH vừa đủ, cần 100ml dd NaOH 5M , sau phản ứng thu được 1 ancol Y và 41,8 gam hỗn hợp 2 muối . Nếu cho Y tác dụng với Na dư thu được 3,36 lít H2(đktc) . Công thức của 2 chất hữu cơ trong X là :

Giúp vs ạ giải thích thế nào cx đc ko cần chi tiết nha! Hứa vote đủ!

viết khoảng 20 dòng trình bày suy nghĩ của em về câu tục ngữ "thất bại là mẹ thành công"

1/2 km2 = ............... m2 1 tấn 1/2 tạ=............kg

1. I think no city in the world is more livable than Vienna. →I think Vienna .......................................................................................................................................................................................... 2. My hometown is the same as it was in the 2000s. →My hometown hasn’t ............................................................................................................................................................................. 3. “How should I improve my pronunciation?” Nga said. →Nga wondered .......................................................................................................................................................................................... II. Combine these pairs of sentences, using the words in brackets. 1. She was far away. She could see that he was watching her. (although) → ........................................................................................................................................................................................................................ 2. He would know we’d called. We left a message with his neighbour. (so that) → ........................................................................................................................................................................................................................ 3. “How much money should I spend on the present?” Vicky said. (wondered) → ........................................................................................................................................................................................................................ 4. Hoi An ancient town is more beautiful than my hometown. (as) → ........................................................................................................................................................................................................................ 5. It’s important that you have a good relationship with your classmates. (get) → ........................................................................................................................................................................................................................ 6. My mother cooked breakfast and then woke me up. (after) → ........................................................................................................................................................................................................................ 7. We all need stress in order to do our best work. (so that) → ........................................................................................................................................................................................................................

nêu cảm nhận của em về số phận của ng phụ nữ vn dưới chế độ phong kiến thong qua 2nv truyện ng con gái nam xương-nguyễn dữ và kiều ở lầu ngưng bích-nguyễn du (viết phần kết bài nha chứ ko phải viết cả bài đâu)

cho hình chóp tứ giác S.AB hình bình hành. Gọi M,N,P theo thứ tự là trung điểm của SB,CD,AD. Lấy K là điểm thuộc SD. a) Tìm giao điểm BK và (MNP) b) Xác định thiết diện tạo bởi hình chóp và mặt phẳng (BNK)CD có đáy ABCD là

phải giải thích nhé nhanh lên 4 h 30 'h mình nộp bài giải thích dài vào mới có ctlhn mình cảm các bạn hhhhhhhhhhhhhhheeeeeeeeeeeeeelllllllllllllllllllppppppppppppppppppp 20. Choose the word whose underlined part is pronounced differently from the rest. A. advice B. machine C. Chinese D. decide 21. Choose the best answer among A, B, C or D to complete the following sentence. They are used _________outdoors and under pressure. A. to work B. to be working C. to working D. worked 22. Choose the underlined word or phrase that is in correct. Did your house built a long time ago? A B C D 23. Choose the best answer among A, B, C or D to complete the following sentence. Do you mind if I turn _________the T.V? I want to watch the news. A. off B. out C. down D. on 24. Choose the sentence which has the same meaning as the given one. She doesn’t go to china with us. A. We wish she goes to China with us. B. We wish she did went to China with us. C. We wish she went to China with us. D. We wish she can go to China with us. 25. Choose the best answer that is made from the given cues. conutries / not / those / many / to / plan / agreed / the / of A. Many of those countries agreed not to the plan. B. Many of those countries not agreed to the plan. C. Not many of those countries agreed to the plan. D. Not of many those countries agreed to the plan. 26. Choose the best answer among A, B, C or D to complete the following sentence. _________him this book if he comes. A. Gave B. Give C. Giving D. Given 27. Choose the underlined word or phrase that is in correct. When she came to my house this morning, I still slept. A B C D 28. Choose the best answer among A, B, C or D to complete the following sentence. She asked me what _________. A. is my name B. my name is C. my name was D. my name 29. Choose the best answer among A, B, C or D to complete the following sentence. - An: “I’ve passed my exam.” - Ba: “_________.” A. Good luck B. It’s nice of you to say so C. That’s a good idea. D. Congratulations! 30. Choose the best answer among A, B, C or D to complete the following sentence. - Mary: “That’s a very nice skirt you are wearing.” - Julia: “_________.” A. That’s nice B. I like it C. That’s all right D. I’m glad you like it

Tìm x để biểu thức sau có nghĩa Mình cảm ơn ạ

vẽ cho mik 1 pé chibi buồn vẽ hình dưới cx đc kí xuống dưới hộ mik nhé