Sục `V(l)` `SO_2` vào `200ml` dd `NaOH` `2M` thu được dd có `m_{ct}=22,9(g)`. Tính `V`

1. If you (give) the young boy this stick, he’d hurt himself. 2. We (not/take) the wrong tram if Dzung had asked the policewoman. 3. If the cat hides in the tree, the dog (not/find) it. 4. The students would have solved the problem if they (use) their textbooks. 5. If he washed his feet more often, his girlfriend (visit) him more often. 6. Manh (read) the newspaper if he went by train.

Xác định số tự nhiên khi biết tổng. a) 7 000 000 + 5 000 + 20 + 5 b) 10 000 + 200 + 9

Làm sao để biết sản phẩm của một phản ứng hoá học?

Ai mà từ chối tôi wanhs help..............................................................................

Vẽ một ảnh nền chibi hai đứa bff nữ nha, bức thứ hai tìm trên mạng cũng đc nhưng phải đẹp

Giúp mình với ạ! B1: chứng minh rằng 6x-x² -10<0 B2: tìm gtnn của biểu thức A= x²+y²-4x+6y+16 B3: tìm gtln a) 7x-x² b) -x²+2xy-2y²+10y-8

giúp giúp giúp giúp giúp giúp giúp giúp giúp giúp giúp ạ :>

giải chi tiết hộ mình Cho 14,4 gam hỗn hợp Z gồm muối cacbonat và hidrocacbonat của cùng một kim loại kiềm (M) phản ứng với dung dịch HCl dư, phản ứng hoàn toàn thu được 2,8 lít khí CO2 (đktc). - a. Xác định kim loại M ? - b. Tính phần trăm khối lượng các muối trong Z ?

Câu 1. Last year my son was lost among the crowd when we have gone shopping. A B C D Câu 2. The problem has turned out to be more serious than we will have thought. A B C D Câu 3. Almost 300 million people had visited America’s national parks every year. A B C D Câu 4. They have studied English before they went to London. A B C D Câu 5. They has got married for 30 years by the end of this month. A B C D Câu 6. They will help you whenever you will ask them. A B C D Câu 7. When Sam will arrive, he will open the gift. A B C D Câu 8. My father has ever told me honesty was the best policy. A B C D Câu 9. Did you say that you will have a lot of things to do the following week? A B C D Câu 10. When we arrived at the station, the train has already left. A B C D Câu 11. Did your doctor recommend you that you will stop smoking? A B C D Câu 12. Up to now, there had been no woman being chosen the US president. A B C D Câu 13. The neighbors are having a party. They are making so much noise since 6 o’clock. I can’t sleep. A B C D Câu 14. Don’t leave the house until I will get back. A B C D Câu 15. I was walking along the pavement when I realized that there has been a man following me. A B C D Câu 16. Human had struggled against weeds since the beginning of agriculture. A B C D Câu 17. Mary said that she do jogging every morning. A B C D Câu 18. At this time next week, Peter was working in London. A B C D Câu 19. Never I have seen such a good film before. A B C D Câu 20. Before the 1920s, no women will vote in the US. A B C D Câu 21. Some students have always complain that they do not have enough money to spend. A B C D Câu 22. The teacher got angry with him because he sometimes come to class late. A B C D Câu 23. The mother had always took good care of her little son. A B C D Câu 24. An American woman not always shake hands when she is introduced to a man. A B C D Câu 25. Peter has been written the composition for 3 hours and he has not finished yet. A B C D Câu 26. We were a few minute late so the film was already started when we got to the cinema. A B C D Câu 27. By the time the police come, the robber had run away. A B C D Câu 28. Why didn’t Peter go to school? What did happened to him? A B C D Câu 29. I was listening to the radio when the door bell will ring. A B C D Câu 30. I have learnt English for I was ten years old. A B C D