Đốt cháy hoàn toàn 30 ml rượu etylic chưa rõ độ rượu, cho toàn bộ sản phẩm cháy đi vào dd Ca(OH)2 dư, thu được 100 g kết tủa. Biết khối lượng riêng của rượu etylic là 0,8g/ml và của nước là 1,0 g/ml. Độ rượu của rượu đem đốt là bao nhiêu?

Các câu hỏi liên quan

1. David had gone home before we arrived. After ……………………………………………………………………………………. 2. The light had gone out before we got out of the office. When……………………………………………………………………………………. 3. After she had explained everything clearly, we started our work. By the time ……………………………………………………………………………. 4. My father had watered all the plants in the garden by the time my mother came home. Before …………………………………………………………………………………. 5.They provided food and then cleared up the debris. After they………………………………………….…………………………………………….. 6. My father had dinner, and then he watched a football match on TV. After………………………………………………………………………………………….. 7. She closed the door. She left the house. Before she………………………………………………………………………………………….. 8. Mary is cutting the cake with a sharp knife. The cake ………………………………………………………………………………………….. 9. The police haven’t found the murderer yet. The murderer ………………………………………………………………………………………….. 10. I don’t have enough time , so I can’t go on holiday this summer. If ……………………………………………………………………………………………………….

Giúp mình với ạ!Giúp mình với ạ! 1. Yesterday, they (come) ………….. back home after they (finish) ………… their work. 2. She said that she ( meet) ……………………. Mr. Bean before. 3. Last night before he (go) ……………….. to bed, he (read) …………………… a novel. 4. When I came to the stadium, the match (start) ……………………………for a moment. 5. My father (not/ play) ……………………. any sports since last year. 6. Some people (attend) …………………….the meeting right now. 7. If I had a typewriter, I (type) ……………………. it myself. 8. He (live) ……………………. in Laos before he went to Vietnam. 9. After Hoa (eat) ……………………. the cake, she began to feel sick. 10. I (not drink) …………………….that wine if I (be) ……………………. you. 11. While the plumber (repair) ………………the dishwasher, I (watch) …………………the smartphone. 12. She said that she (already, see) .................................. Dr. Rice. 13. Yesterday, after he (take) ……………………. a bath, he (go) ......................... to bed. 14. He told me he (not/eat) ......................... such a kind of food before. 15. When he came to the station , the train (already/leave) ............................. 16. Yesterday, John (go) ....................... to the store before he (go) ....................... home. 17. She (win) ......................... the gold medal in 1986. 18. Our teacher (tell) ......................... us yesterday that he (visit) ......................... England before. 19. Before I (watch) ......................... TV, I had done my homework. 20. After I (wash) ......................... my clothes, I slept.