Help me Hoà tan vừa đủ 12,0 gam hỗn hợp X gồm kim loại A và kim loại B trong dung dịch chứa hỗn hợp HNO3 và H2SO4 thấy thoát ra 5,376 lít (đktc) hỗn hợp khí Y (gồm NO2 và SO2) có khối lượng 11,76 gam. Cô cạn dung dịch sau phản ứng (không chứa muối amoni) thì thu được m (gam) muối khan. a) Tìm m b) Khi tỉ lệ số mol của các khí thay đổi thì m biến thiên trong khoảng nào

các idol guitar cho tui xin tên 10 bài hát hay dễ chơi vs.( chỉ khoảng 3 -> 4 hợp âm trong 1 bài) Cho tui xin ảnh đàn của các idol Hông có hoặc download ảnh đàn từ trên mạng = bc thanks các idol ;)) ảnh đàn tui nà

nêu khái niệm câu trần thuật đơn có từ là, nêu ví dụ giúp mình với hứa sẽ vote 5 sao

32. The blue car crashed. It was a Ford. → 33. That’s the travel agency. It sells cheap tickets. → 34. They are the spies. The police have been watching them. → 35. That is the name. I couldn’t remember it yesterday. → 36. Those are the astronauts. They were in orbit for six months. → 37. My parents send their best wishes. You met them last month. → 38. The parcel contained a bomb. They had opened it carefully. → 39. The match will be shown on TV tonight. They filmed it this afternoon. → 40. His sisters are identical twins. I saw them last year. → 41. The film is about two people. Their plane crashed in the jungle. → 42. The play is about a King. His ambition is to rule the world. → 43. The ballet is about the princess. Her stepmother hated her. → 44. The song is about 2 young lovers. Their romance ended happily. → 45. Charlie Chaplin died in 1977. His film amused millions. → 46. Rod Lee, the actor, has just won an Oscar. I know her sister. → 47. Our teacher speaks English perfectly. Her parents are Greek. → 48. The Taylor family now live in America. We bought their house. → 49. I love this song. Catherine sang the song. → 50. My parents gave me a birthday present. I like it. → 51. I love this song. The song was written by Catherine. → 52. I want to know about Miss Green. She has just won the gold medal. → 53. This is a new hotel. There are modern facilities in it. → 54. Very few people understood his lecture. The subject of his lecture was very strange. → 55. I’ve lost my ticket. It cost five pounds. → 56. The headmaster spoke to the boys. Their work has below standard. → 57. Trams (=silk) were made long ago. They are still used in several cities. → 58. The secretary wrote me a letter. She knows Fred. → 59. Family dinner is often served at 7 o’clock. It is the biggest meal of the day. → 60. My sister wants to speak to you. You met her yesterday. → 61. It is that man. He wrote this novel. → 62. This doesn’t show the place. The birds come from that place. → 63. The old man has died. You were talking to me about him. → 64. He sat on the table. One leg of the table was nearly broken down. → 65. Hoan Kiem lake is a historical place. Its water is always blue. → 66. He can change the situation. He always likes to do something new. → 67. That is just the thing. I didn’t want it to happen. → 68. You lost a key. Did you find it? → 69. I gave you some money. Where is it? → 70. Jill is wearing a jacket. I like it. → 71. She told a story. I didn’t believe it. → 72. You bought some oranges. How much were they? → 73. You gave me an umbrella. I’ve lost it. → 74. They invited some people to dinner. The people didn’t come. → 75. My secretary is a man. He can speak 2 languages. → 76. Some people live next door to us. They are very nice. → 77. Then a man passed me. He was driving a large modern car. → 78. I saw some people. Their car was broken down. → 79. This is a photograph of our classmates. We went on holiday with them. → 80. Jack has 3 brothers. All of them are married. → 81. Ann has a lot of books. She hasn’t read most of them. → 82. They’ve got 3 cars. They never use 2 of them. → 83. A bus crashed into a van yesterday. It was carrying 30 passengers. → 84. When I was walking home, there was a man. He was following me. → 85. I was waken up by the baby. She was crying. →

Giúp e với ạ :(( Em đang cần gấp..

Chia số 237 thành ba phần. Biết phân thứ nhất và phần thứ hai tỉ lệ với 5 và 3; phần thứ hai và phần thứ ba tỉ lệ với 8 và 5. Tìm mỗi số.

Cho xOy là góc bẹt . Trên cùng một nửa mặt phẳng bờ là đường thẳng xy vẽ các tia Oz , Ot sao cho góc xOz = 60° , xOt = 120° . a) Chứng tỏ rằng : Tia Oz nằm giữa hai tia Ox và Ot . b) Tính góc zOt c) Tia Ot có phải là tia phân giác của góc yoz hay không ? Vì sao ?

Chứng minh rằng với tứ giác ABCD bất kì ta luôn có: vecto AB- vecto CD =vecto AC- vecto BD. Em có thể tìm được bao nhiêu cách chứng minh?

Kết hợp hai câu lại với nhau dùng đại từ quan hệ. 1. The doctor is with a patient. The patient’s leg was broken in an accident. → 2. Jane is the woman. Jane is going to China next year→ 3. Janet wants a typewriter. The typewriter self corrects. → 4. I found this book last week. The book contains some useful information. → 5. Mr. Bryant’s team has lost the game. He looks very sad. → 6. James wrote an article. The article indicated that he disliked the President. → 7. The director of the program is planning to retire next year. The director graduated from Harvard University. → 8. This is the book. I’ve been looking for this book all year. → 9. William wants to become a judge. William’s brother is a lawyer. → 10. The last record became a gold record. The record was produced by this company. → 11. Checking accounts are very common now. The Checking accounts require a minimum balance. → 12. Felipe bought a camera. The camera has three lenses. → 13. Frank is the man. We are going to nominate Frank for the officer in the school (nominate sb for/to a post = appoint ) 14. She is the woman. I wrote to her. → 15. They’re the people. I was talking about them. → 16. John received a scholarship. John’s grades are the highest in the school. → 17. That is the dog. I was afraid of it. → 18. Mr Cox is the manager. I am phoning for him. → 19. That is the tunnel, He went through it. → 20. She is the lady. He argued with her. → 21. She is the policewoman. The driver spoke to her. → 22. That is the mistake. I am complaining about it. → 23. He is the man. The novel was written by him. → 24. That is the shop. I bought a radio from it. → 25. Mr Cox is the manager. He saw Ann. → 26. Those men saved my life. They pulled from the burning car. → 27. That woman travels everywhere by private plane. She is a millionaire. → 28. That hotel’s near the beach. It’s the most expensive. → 29. Those birds migrate to Antartica. They breed near the North Pole. → 30. He is the criminal. The police are looking for him. → 31. These are the books. I use them in class. →

1 lớp chỉ có học sinh giỏi và học sinh khá cuối học kì 1 số học sinh giỏi bằng 2/7 số học sinh khá đến cuối năm học có 1 bạn học sinh khá thành học sinh giỏ nên số học sinh giỏi bàng 1/3 số học sinh khá tính số học sinh lớp đó (bài toán quy về cùng đơn vị)