cho 7,68g hh X gồm Mg va Al vào 400ml dd Y gồm HCl 1M va H2SO4 0,5M. sau khi p/u sảy ra hoàn toàn thu dk 8,512l khí (đktc), biết trong dd, cá axit phân li hoàn toàn thành các ion. phần trăm về khối lượng Al

Câu 3(1điểm): Câu chuyện ” Những vết đinh” khuyên chúng ta điều gì?

Cho AB//CD,Ex và FY là 2tia phân giác của 2 góc đồng vị. Hãy chứng tỏ Ex//FY

1)Dãy chất (phân tử,ion) đều là bazo theo Bron-stet A MgO, NaOH, CO32-, AlO2- B SO42-, Al2O3, Al3+ , HCl C CO2, NH4+ , Fe3+, HSO4-, D NH4+ , Fe3+, CuO, AlO2- 2) Dãy các muối bị thủy phân là A AlCl3, CH3COONa, K2SO3 B K2S, KHS, KHSO4 C K2CO3, KHCO3, KBr D Na3PO4, Ba(NO3)2, Na2SO4

có bao nhiêu số tự nhiên chia 6 dư 1

Nêu hiện tượng và viết các Phương trình hóa học xảy ra trong các trường hợp sau: a/ Dẫn từ từ khí CO2 đến dư vào dung dịch nước vôi trong. b/ Nhỏ vài giọt dung dịch NaOH vào ống nghiệm chứa 1ml CuSO4. Lắc nhẹ ống nghiệm.

Ai bt cách bỏ cái đường màu đỏ trên màn hình đc không

Find mistakes, underlined and fix: 1. Is you English the better than mine. 2. This is more funiest animal in the world. 3. Is her father makes these chair. 4. My birthday is at May $2^rd$. 5. How weight are you? 6. You shouldn't went out alone in night. 7. Do you aunt likes read novels? 8. Do our having water too.

5/2 + 5/2 = Nhớ rút gọn luôn nhé

- Passive with verbs of perception - Put the following sentences into passive in two ways. 11. People know that Japan produces a wide range of cars. ……………………………………………………………………………………… ……………………………………………………………………………………… 12. People said he had swallowed a safety pin. ……………………………………………………………………………… ……………………………………………………………………………… 13. People claim that the decision imposes tight restrictions on cross-border trade. …………………………………………………………………………………………………… …………………………………………………………………………………………………… 14. They told me that you were the best architect in this city. …………………………………………………………………………………………………… …………………………………………………………………………………………………… 15. She reported that the flowers were killed by frost. …………………………………………………………………………………………………… …………………………………………………………………………………………………… 16. Some people inform that the director is going to take a business trip to England. ……………………………………………………………………………………………………… …………………………………………………………………………………………………… 17. That officer announced that the meeting was delayed until next week. …………………………………………………………………………………………………… …………………………………………………………………………………………………… 18. He discovered that this cotton was grown in Egypt. ………………………………………………………………………………………………… …………………………………………………………………………………………… 19. They promise that the performance will start on time. …………………………………………………………………………………………… …………………………………………………………………………………………… 20. He recommends that we should stay at the city center. ………………………………………………………………………………………… ………………………………………………………………………………………… 21. We believed that Alice passed the driving test. …………………………………………………………………………………………… ………………………………………………………………………………………… 22. The director notifies that they worked extra hard last month. ……………………………………………………………………………………… ……………………………………………………………………………………… 23. They have persuaded that they are going with me to the stadium. ……………………………………………………………………………………… …………………………………………………………………………………… 24. They have decided that the company is going to the beach together at the weekend. ……………………………………………………………………………………………… …………………………………………………………………………………………… 25. People think that Maradona is the best football player in the 20th century. ……………………………………………………………………………………… ………………………………………………………………………………………… 26. They find that the job is not suitable for a girl like her. ……………………………………………………………………………………………… ………………………………………………………………………………………………… 27. The teacher explained that this powerful engine pulled the train. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 28. He said that his football team had played well last season. ……………………………………………………………………………………………… ……………………………………………………………………………………………… # Làm theo 2 cách