Đáp án:
Giúp mình với hic :< Trộn 3 dung dịch H2SO4 0.1M, HNO3 0.2M, HCl 0.3M với thể tích bằng nhau thu được dung dịch A. Lấy 300ml dung dịch A tác dụng với Vml dung dịch B gồm NaOH 0.2M và Ba(OH)2 0.1M. Sau khi PƯ kết thúc thu được dung dịch có pH=1. (Coi Ba(OH)2 và H2SO4 phân li hoàn toàn ở 2 nấc). Giá trị V là?
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mọi người giúp mk đến câu 52 nha đặt câu hỏi
29. I didn’t have a laptop so I wish I (have) ………………………. a laptop. 20. You didn’t stay home. I would rather you (stay) …… ………..home. 31. After she (finish) _____________ breakfast she left the house. 32. Before he came to Warsaw he (live) ____________ in Prague. 33. He (spend) _______________ three years in Tahiti when he was a child. 34. He told me he (never be) ________________ to Australia before. 35. He told me he (never see) ______________ anything like that. 36. I (write) ________________ a long letter to my mother yesterday. 37. I couldn't get in because I (lose) _______________ my keys. 38. I felt really stupid because I (make) ______________ a lot of mistakes. 39. I paid for the window because my son (break) _____________. 40. I told him I didn't know who (steal) _____________ his pen. 41.I was feeling very thirsty because I (drink) __________ too much alcohol the night before. 42. The doctor examined her leg and (find) _______________ that she had broken it. 43. When I saw her I knew we (never meet) ______________ before. 44. After the children (finish) ...................… their homework, they (go) ...........… to bed. 45. I (do) .........................… it before he (come) ....................…. 46. When I (come) ....................… there, they (leave) ......................…. 47. I (meet) ...................… them after they (divorce) .....................… each other. Ex3. Viết lại câu sao cho nghĩa không đổi sử dụng từ gợi ý cho sẵn. 1. David had gone home before we arrived. –> After ……………………………………………………………………………………. 2. We had lunch then we took a look around the shops. –> Before …………………………………………………………………………………… 3. The light had gone out before we got out of the office. –> When……………………………………………………………………………………. 4. After she had explained everything clearly, we started our work. –> By the time ……………………………………………………………………………. 5. My father had watered all the plants in the garden by the time my mother came home. –> Before …………………………………………………………………………………. 6. I had a bath. Then I went to bed –> After ………………………………………………………………………….. 7. We arrived. The party finished. –> By the time …………………………………………………………………… 8. We hung the picture on the wall. Then it fell down. –> No sooner……………………………………………………………………… 9. She wrote the letter. Then she went to the post office. –> Before ………………………………………………………………………… 10. I didn’t go to bed. I did my homework. (Until) –> ….……………………………………………………………………………
Dùng ĐỊNH NGHĨA tìm đạo hàm của hàm số này giúp mình nhe
Đầy đủ tháng ngày .... hoàn chỉnh nha
Em cần rất gấp mọi người làm ơn giúp em.
Giải giúp mình câu 37 với ạ. Rõ ràng nha. Mình cảm ơn
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