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ttnphuongh
2 năm trước
Cho natri dư vào dung dịch (A) gồm phenol và xiclohexanol trong dung môi hexan thu được 1,792 lít khí hidro (điều kiện tiêu chuẩn). Mặt khác, cho dung dịch brom dư vào (A) thu được 19,86 gam kết tủa trắng. Tính khối lượng từng chất có trong (A). GIÚP EM VỚI EM VOTE 5 SAO Ạ
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Các câu hỏi liên quan

I. Fill in the blank. 1. The local people learn to …………. a horse when they are very young. 2. Many city children enjoy …………. fruit in the countryside. 3. Mongolian farmers have …………. hay for winter. 4. The farmers often go …………. the buffaloes from early morning. 5. Every afternoon, the children in the countryside usually …………. trees. 6. It’s interesting to go …………. in the river in summer. 7. It takes a lot of time to …………. rice by hands. 8. In the countryside, children learn to …………. the cattle when they are small. 9. We help to …………. the rice onto buffalo- drawn carts. 10. Have you ever grilled fish in rice ………….? 11. …………. kites in the wide open countryside is great fun. 12. Our village has no running water, which is inconvenient. We have to help our parents to …………. water from the river. 13. When a thing has lots of bright colours, it is …………. . 14. A busy time when people collect their crops is called …………. . 15. …………. in Vietnam gather mainly in the Red River Delta and the Mekong Delta. 16. The sky is …………. here in the countryside. There are no buildings to block the view. 17. …………. is hard because people have to move a lot 18. During harvest time, the village children help their parents load the rice onto …………. and ride them home. 19. …………. include farm animals such as buffaloes, cows, goats or sheep. 20. The field is full of …………. rice which is now ready for harvest. 21. A land or a field that is covered with grass and is used for cattle to feed on called …………. 22. Food that made from milk, such as butter and cheese is called …………. 23. Some animals such as buffaloes and cows is called …………. .

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