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Cho 15 g hỗn hợp Mg , Al chia đôi tiến hành 2 thí nghiệm Thí nghiệm 1 : Cho 1 nửa vào 600 ml dd HCl xM được khí A và dd B cô cạn đ B được 27,9 g muối khan b) Thí nghiệm 2 : Cho 1 nửa vào 800 ml đ HCl xM làm tương tụ thu được 32,35 g muối khan . Xác định Kikhoois lượng mỗi kim loại và nống đọ x , tính thể tích H2 ở đktc Giúp mình nhanh với nhá mình sắp cần rồi 5* và ctlhn nhaa
Em cần gấpnlawms ạ mọi ng giúp em vs. Vẽ hình giúp em luôn nha
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Cho 8,96 lít N2 tác dụng với 13,44 lít H2 ở điều kiện thích hợp thì thu được hỗn hợp khí Y có tỉ khối so với H2 là 6,888. Tính hiệu suất của phản ứng. Các thể tích đo ở điều kiện chuẩn
Tìm giá trị nhỏ nhất ...................................
Using participles to join sentences Join each of the following pairs of sentences, using either a present participle e.g. knowing, a past participle e.g. known, or a perfect participle e.g. having known. Numbers 17, 28, 33, and 36 contain three sentences each. Combine these in the same way. He got off his horse. He began searching for something on the ground. Getting off his horse, he began searching . . : I had seen photographs of the place. I had no desire to go there. Having seen photographs of the place, I had no desire . . . The speaker refused to continue. He was infuriated by the interruptions. Infuriated by the interruptions, the speaker refused. . . These participle constructions are more common in written English. 1 I knew that he was poor. I offered to pay his fare. 2 We barricaded the windows. We assembled in the hall. 3 She became tired of my complaints about the programme. She turned it off. 4 He found no one at home. He left the house in a bad temper. 5 She hoped to find the will. She searched everywhere. 6 The criminal removed all traces of his crime. He left the building. 7 He realized that he had missed the last train. He began to walk. 8 He was exhausted by his work. He threw himself on his bed. 9 He had spent all his money. He decided to go home and ask his father for a job. 10 He escaped from prison. He looked for a place where he could get food. 11 She didn't want to hear the story again. She had heard it all before 12 They found the money. They began quarrelling about how to divide it. 13 She entered the room suddenly. She found them smoking. 14 I turned on the light. I was astonished at what I saw. 15 We visited the museum. We decided to have lunch in the park. 16 He offered to show us the way home. He thought we were lost. 17 He found his revolver. He loaded it. He sat down facing the door. 18 She asked me to help her. She realized that she couldn't move it alone. 19 He fed the dog. He sat down to his own dinner. 20 He addressed the congregation. He said he was sorry to see how few of them had been able to come. 21 He thought he must have made a mistake somewhere. He went through his calculations again. 22 I have looked through the fashion magazines. I realize that my clothes are hopelessly out of date. 23 The tree had fallen across the road. It had been uprooted by the gale. 24 People were sleeping in the next room. They were wakened by the sound of breaking glass. 25 I knew that the murderer was still at large. I was extremely reluctant to open the door. 26 He stole the silver. He looked for a place to hide it. 27 We were soaked to the skin. We eventually reached the station. 28 I sat in the front row. I used opera glasses. I saw everything beautifully. +29 One evening you will be sitting by the fire. You will remember this day. 30 I didn't like to sit down. I knew that there were ants in the grass.
Bài 1: 3 chuồng có 87 con gà. Hỏi 5 chuồng đó có ? con gà.
Câu 2 Trong vườn trồng 84 cây gồm bốn loại cam, xoài, chanh và bưởi. Biết số cây cam chiếm4/7 số cây trong vườn, số xoài bằng 3/8 số cây cam, số cây bưởi bằng số cây chanh. Tính số cây mỗi loại trong vườn?
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