Giúp mình với, mình cảm ơn trước ạ

5.1. Có 500 ml dung dịch HNO3 0,2M. Hỏi phải thêm bao nhiêu ml nước vào dung dịch này để thu được dung dịch mới có pH= 1,0 ? 5.2. Có 20 ml dung dịch HCl có pH =2 . Hỏi phải thêm bao nhiêu ml nước vào dung dịch này để thu được dung dịch mới có pH= 3 ? 5.3. Có 50 ml dung dịch NaOH có pH =12 . Hỏi phải thêm bao nhiêu ml nước vào dung dịch này để thu được dung dịch mới có pH= 10 ? 5.4. Pha loãng 10 ml dung dịch HCl vào nước thành 250 ml ,dung dịch thu được có pH= 3 .Hãy tính nồng độ mol/lít của dung dịch HCl và pH của nó trước khi pha loãng ? 5.5. Cho V1 ml dung dịch NaOH có pH =13 . Pha loãng dung dịch này bằng nước cất để thu được V2 ml dung dịch NaOH có pH= 10 . Thể tích V2 lớn hơn V1 bao nhiêu lần ?

Giúp ạ hứa vote 5* với ctlhn ạ:>

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heo mi heo mi nao pờ lít vót fai sờ ta

Câu 26 nhận định nào sau đây không đúng về ảnh hưởng tích cực của đô thị hóa A kinh tế tăng trưởng nhanh B cơ cấu kinh tế chuyển dịch C thay đổi quá trình sinh tử D nông thôn mất đi nguồn nhân lực

21. Do you need a ………………………………………..English class ? (competitor) 22. We all looked …………………..……..after the summer holiday. (health) 23. Young children think that animals are . ……………………..………………………..(fascinate) 24. Mary gets lots of flowers because of her good…………………….(perform) 25. The children are more…………………………………………….……………….in cartoon.(interst) 26. ……………………………………………activities should be promoted widely in our country. (culture) 27. To my…………………………………………., he passed the exam easily. (amaze) 28. ……………………………………………., the weather was so bad that we couldn,t go out. (fortune) 29.The hotel we used to stay has now been ………………………………………………………(modern) 30. We like this car because it is very…………………………………………………………… (economy) 31. She said: “Good morning” in a most……………………..way.(friend) 32. Each athlete take part in the Olympic Games in the true spirit of …………………..(sports) 33. They work hard in order to …..…………………….……………….good crops from poor soil.( product) 34. They caught him by the wrist and led him away; he went without ………………….………….(resist) 35. I,m afraid you aren,t suitably……………………….………………….for this job.(qualification) 36. I hope there won,t be too much ……………………………………….in getting a work permit.(difficult) 37. In parts of the country, the…….…. situation is terrible. As many as 20% of working population is without a job. (employ) 38. Thousands of people are living in ………….…………………………after the earthquake. (miserable) 39. He felt very……………………………………….when he saw he has failed the exam again. (courage) 40. He owes his ……………………………………………………….largely to his sense of humour. (popular) 41. There has been a……………….of 10% in the amount of money available for buying neaw books(reduce) 42. I was kept …………………………………. last night by the noise from the party in the flat above. (wake) 43. I think it is not easy to find out the ………………………………………………….to this problem.(solve)

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she had never intended to .......... wrong and he had punished her too hard. A.do B.follow C.write D.play Mọi người trả lời chi tiết giúp mình với

1. The …………………………………..……….of people prefer TV to radio (major) 2. Lucy got ……………………………………………….quickly and went for work (dress) 3. Some young people today want to have a strange………………….………..…………….. (appear). 4. Do you want to go to the ………………………………………..areas to know more about the region ? (near) 5. That……………………………………….…………….has composed a lot of beautiful songs. (music) 6. If the industry doesn,t ……………………………., it will not survive. (modern) 7. This house is very lovely and very ……………………………………………..(fashion) 8. Mathematics and Literature are………………………………………..for children in this country. (compel) 9.She was the only visitor ………………………………………………..into the sick room. (admission) 10. His health was seriously affected and he suffered from constant …………….……………………. (sleep) 11. She disvorced him because of his ………………..…….to the children. (kind) 12. He has few friends because he is so …………………………………………………..(society) 13. In ………………………………………………..……..to doing the cleaning, I make the coffee (add) 14. Can we meet that …………………………..…………………………….. at the party? (magic) 15. Please………………………………..…………….our letter of the 10th. We have not had a reply. (know) 16. Weare waiting for…………………………………………..…………………of his plane. (arrive) 17. It was a complete………………………………………………….due to poor planning. (fail) 18. People who live in the cities spend their lives in an atmosphere of…………………………noise. (continue) 19. Atnight we close our windows only to be kept ……………….by our neighbour,s radio or television. (wake) 20. Doctors and……………….have reported on how we are all affected by the noise around us. (science)