Hoà tan hoàn toàn 23,2 gam Fe3O4 cần vừa đủ V lít dung dịch HCl 0,4M. Sau khi phản ứng thu được dung dịch A. Tính V? Tính khối lượng chất tan trong dung dịch A?

Lập tất cả cá tỉ lệ thức từ các số sau : 1,2,3,6,9

Emm cần gấp lắm ạ:( Giúp em với

I. Rearrange the words and phrases given to make meaning full sentences: 1.in/ Linh/ ocean fish./ is/ interested/ ……………………………………………………………………….. 2. many sports./ not/ I’m/ at/ good/ ……………………………………………………………………….. 3. like/ you/ best?/ Which/ will/ room/ ……………………………………………………………………….. 4. tomorrow./ We/ going/ are/ on/ picnic/ a/ ……………………………………………………………………….. 5. environment./ save/ They/ to/ want/ the/ ……………………………………………………………………….. II. Complete the second sentence so that it means the same as the sentence before: 1. They intend to make this beach a clean and beautiful place again. They plan…………………………………………………………………….. 2. The students started to collect old clothes for their charity programme last week. The students have...………………………………………………………….. 3. If I don't leave now, I'll miss my train. Unless I leave ………………………………………………………………….. 4. Students at our school do a lot of outdoor activities. Students at our school take……………………………………………………… 5. Phuc is the most intelligent student in the class. No student ……………………………………………………………………… III. Make sentences using the words and phrases given : 1. What/ time/ you/ go/ gym/ yesterday? =>………………………………………………………………………………….. 2. My/ brother/ favourite/ sport/ volleyball. =>…………………………………………………………………………………... 3. you/ play/ blind man's bluff/ when/ you/ young? =>…………………………………………………………………………………… 4. I/ more/ interested/ in/ football/ than/ table tennis. => ………………………………………………………………………………….. 5. Our team/ win/ match/ last Saturday. =>…………………………………………………………………………………..

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Giúp mk vs. Bạn hãy đọc đoạn văn sau và điền một từ thích hợp vào ô trống. On school-days, Tom’s mother calls him at six. He gets up and goes to the bathroom. There he washes his face and brushes his teeth. Then he gets a bath and goes downstairs to have breakfast. Tom leaves home at about half past six with his school bag under his arm. He gets to school at a _________ to seven and plays or talks with his friends when the bell rings.

Viết tất cả các số tự nhiên từ 1 đến 999 cần dùng bao nhiêu chữ số 2

I. Read the following passage and put a word in the box in each of the numbered blanks: television ​ important​pay ​ comfortably ​ cheap Television now plays such an (1) _________ role in so many people's life. First of all, (2) ________ is not only a convenient source of entertainment, but also rather a (3) ________ one. For a family of four, for example, it is more convenient as well as cheaper to sit (4) ________ at home than to go out. They don't have to (5) ________ for expensive seats at the theatre or in the cinema. II. Choose the correct word A, B, C or D for each gap to complete the following passage : ​I live in (1)________small village called Henfield. There (2)_______about 600 people here. I love the village because it is very quiet and life is slow (3)________easy. The village is always clean-people look (4)__________it with great care. The air is always clean, (5)_________ . It is much more friendly here than in a citybecause everyone knows everyone, and if someone has a problem, there are always people who can help. 1. A. a​B. an ​C. the​D. many 2. A. have​B. is​ C. are​D. be 3. A. but​ B. and​ C. or​ D. because 4. A. after​B. for ​C. at ​ D. with 5. A. also​ B. either ​C. so ​D. too III. Read the following passage and do the tasks below : Roger Federer is probably the best and most famous tennis player in the world today. He was born on August 8th, 1981 in Basle, Switzerland. His parents encouraged him to start playing tennis when he was 8 years old. He won his first Wimbledon title , The Wimbledon Junior, when he was sixteen. Over the next few years, he played all over the world. In Australia he played for his country in the 2000 Olympic Games. Then in 2003 he began to show how good he was. He started the year by winning two tournaments in a row, in Dubai and Marseilles. He also won his first Grand Slam title at the Wimbledon Championships. In 2004 he won 3 out of four grand Slam titles. When he is not playing tennis, Federer is busy with his special project, the Roger Federer Foundation, which helps disadvantaged children A. True ( T) or False ( F) : Statement T F 1. Roger Federer was born on August 8th, 1918 in Basle, Switzerland. 2. He won 3 out of four grand Slam titles in 2004. B. Answer the questions : 1. When did Roger Federer begin to show how good he was ? …………………………………………………………………………………….. 2. Did he win the Wimbledon Junior when he was sixteen ? …………………………………………………………………………………….. 3. Where did he play for his country in the 2000 Olympic Games? ……………………………………………………………………………………..

Bài 10 và 11@...%. .....bdjdbdnssj

III. Write given relative pronoun or a relative adverb into the correct space. who which whose where when why 1. The beach __________we spent our holiday was really fantastic. 2. Did she tell you the reason __________she was so depressed yesterday? 3. Have you ever met Bill Gates, __________is the former CEO of Microsoft? 4. She is a successful businesswoman__________company is always the 10th in the world ranking. 5. Jane has just sold the car__________she was given on her 20th birthday. 6. Do you still remember the day__________we have to submit our essays?