Cho hỗn hợp khí A gồm hai ankin kế tiếp trong dãy đồng đẳng qua bình đựng nước brom dư. Sau thí nghiệm có 80 gam brom đã phản ứng và khối lương bình chứa brom tăng thêm 8,6 gam. a. Viết công thức cấu tạo của hai ankin. b. Cho 8,6 gam A qua dung dịch AgNO3 trong NH3 dư. Tính khối lượng kết tủa tạo thành.

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II. WORD – FORM 10: 1. The outbreak of the flu epidemic resulted in a sharp ___________ in the number of tourists. (REDUCE) 2. This novel is not ___________ of all his works. (REPRESENT) 3. Recycling programs have helped to sold some of the ___________ problems. (ENVIROMENT) 4. These plants grow well in ___________ soil by the river. (FERTILIZE) 5. This book is very interesting; it contains lots of ___________ information. (USE) 6. The river has been used for many years as an ___________ waste dump.(INDUSTRY) 7. All of the students in my class elected Huong as our ___________. (REPRESENT) 8. This novel is not ___________ of all his works. (REPRESENT) 9. The money should be more ___________ spent on the recycling plan. (USE) 10.Farmers use different kinds of ___________ to enrich the soil. (FERTILIZE) 11. The children are playing ___________ toys. (WOOD) 12.Dead leaves fall to the ground and ___________ very quickly in wet weather. (COMPOSE) 13. Miss White is a ___________ from “Friends of the Earth”. (REPRESENT) 14. Add sugar, water and flour to the beaten eggs and stir the ___________ well. (MIX) 15.Bowls, vases, jars, and glasses are sold in the ___________ store at the corner. (GLASS) 16. We can make the soil richer by adding ___________. (REPRSENT) 17.There is some ___________ in pollution. (REDUCE) 18.The teacher gave the children a detailed ___________ to the recycling plan. (EXPLAIN) 19. Do they give many ___________ in English during the summer break? (COURSE) 20.The school will organize an Art ___________ next month. (EXHIBIT)