Ngâm Fe dư trong 200ml dung dịch CuSO4 1M. Sau khi phản ứng kết thúc, lọc kết tủa chất rắn A và dung dịch B. a) Cho A tác dụng với dung dịch HCl dư. Tính khối lượng chất rắn thu được sau phản ứng. b) Tính thể tích dung dịch NaOH 1M vừa đủ để kết tủa hoàn toàn dung dịch B. Lọc tách kết tủa đem nung ngoài không khí đến khối lượng không đổi thu được bao nhiêu gam chất rắn. MỌI NGƯỜI GIÚP MÌNH BÀI NÀY VỚI

làm chính xác giúp mh với đag cần gấp ạ !!!

bài 1. tìm x biết a) x³=$x^{5}$ b)x(x-1)-2(1-x)=0 c)4x²-49=0 d) x²+36=12x

3.Write positive and negative sentences examole:pictures/the living room there are pictures in the living room there aren"t pictures in the living room 1.a TV/the table 2.a brown dog/the kitchen 3.a boy/the cupboard 4.a bath/the bathroom 5.lamps/the bedroom

Chuyển lời dẫn trực tiếp thành lời dẫn gián tiếp cho câu sau: a. Cô giáo và các bạn ai cũng thương tôi và lo lắng. Cô giáo nói :"Răng em đau phải không? E về nhà đi" b. Dắt xe ra cửa ,Hoa lễ phép xin thưa: Thưa ba, con xin phép đi học nhóm.

1. 1. BDoes this work involve much (travel) traveling ? 2. 2. He begged (not/tell) not telling his mother. 3. 3. He does not permit anybody (smoke) smoking in his house. 4. 4. He does not resent (be) being laughed at! ( phật long) 5. 5. He has attempted (pass) to be his exam, but unfortunately he fail it. 6. 6 He should instruct you (do) to be this work. It is his responsibility. 7. 7. He strives (be) one of the best! 8. 8 .Here you will find all necessary information that will enable you (do) to do this kind of work. If you still have any questions, don’t hesitate (ask) to ask me. 9. 9. I adore (stay) staying on my own. 10. 10. I am longing (see) you. 11. 11. I appreciate your (stay) staying with me. 12. 12. I cannot admit (do) doing this as it is not my fault. 13. 13. I cannot delay (sign) to sign the contract. 14. 14. I cannot postpone (do) doing this work as it does not depend on me. 15. 15. I cannot resist (eat) to eat cakes. 16. 16. I cannot urge them (work) to work more quickly as I cannot persuade them (do) to do what they do not need (do) to do . 17. 17. I claim (enable) to enable me (do) to do this according to our agreement. 18. 18. I consider it (be) being the most foolish thing you have ever done. 19. 19. I detest (quarrel) quarreling with people. 20. 20. I do not feel like (do) doing it at once. 21. 21. I do not understand how you could (dare) dare (tell) to tell him everything. Dũng cảm, 22. 22. I have come here to convince=persuade you (not/do) not to do it. 23. I will definitely refuse (take part) to take part in this competition. 24. I will report (see) to see him! 25. I will (try) try (convince) to convince them (join) to join us. 26. If I enable you (write) to write this work, I expect you (do) to do it well! . 27. If you fail (do) to do this assignment then it means that you have not listened to me, as I have instructed you (enable) to enable you (do) to do it without (have) having any difficulties. . 28. Just imagine (live) living on the island. . 29. She desires (travel) to travel around the world, but she has to postpone (do) doing this as she is short of money. . 30. The sign warned (not/go) not going there. . 31. They begged (persuade) to persuade him (help) helping them. . 32. They cannot (dare) dare (object) to object him and that is why they are hesitating (tell) to tell him the truth. . 33. They claim (have) to have enough money and time (finish) to finish the work on time. 34. They deserve (be) to be awarded as we appreciate their (help) helping us. Xứng đáng . 35. They failed (pass) to pass the test as they had not studied enough. 36. They should not hesitate (tell) to tell the truth as it is essential. 37. They suggest (arrange) arranging (do) to do it as soon as possible. . 38. We are longing (see) seeing you because we cannot (postpone) postpone (do) doing this work any longer. 39. We do not intend (argue) to argue with them. 40. We should (urge) urge them (finish) to finish all of the work on time. xem hộ mk có đúng ko ạ

Nếu 10 người thì làm xong một công việc trong 7 ngày hỏi muốn làm xong công việc đó trong 5 ngày thì cần bao nhiêu người ? ( mức lm việc của mỗi người như nhau )

Trình bày phần khung tên của bài thực hành công nghệ bài 7 ạ!!!!!!

giúp mình bài 9 hoặc bài 10 với ạ, hứa vote 5 sao nhaaa,

Tóm tắt văn bản sự tích quả dưa hấu(dưới 100 từ)?