Cần trộn Fe2O3 và CuO theo tỉ lệ số mol như thế nào để thu đc 1 hỗn hợp chất rắn trong đó nguyên tố Oxi chiếm 28% khối lượng

Đọc đoạn trích trên và trả lời giúp mình 3 câu cuối a~

Một công dân sản xuất được 72 sản phẩm trong 3 giờ. Nếu người đó làm việc trong 8,5 giờ thì sản xuất bao nhiêu sản phẩm ?

Giúp mik bài này với Mik cảm ơn

Cho hàm số y=(m-1)x-4 có đồ thị đường thẳng (d) a) tìm m để đường thẳng (d) song song với đường thẳng y=2x+5 b) vẽ đồ thị hàm số trên với m tìm được câu a c) đường thẳng (d) cắt trục Ox tại A ,cắt trục Oy tại B .Tìm m tam giác OAB vuông góc

Ba người đi xe đạp, xe máy, ô tô. Vận tốc xe đạp là 12km/h, vận tốc xe máy gấp 4 lần vận tốc xe đạp, vận tốc ô tô bằng tổng vận tốc xe đạp và xe máy. a) Hãy viết biểu thức chỉ quãng đường của mỗi xe đi được sau t giờ. b) Hãy xác định biến số trong mỗi biểu thức đó.

Giúp mình với ạ Mong các bạn giúp mình

I. Read the passage, and then answer the questions. Pirates of the Caribbean Captain Jack Sparrow is a pirate. He has a ship called the Black Pearl. One day, he goes to Jamaica, where he sees a beautiful woman, Elizabeth. Then Jack meets Will, who loves Elizabeth too. Jack, Will, and Elizabeth look for pirate treasure. The treasure is on the island Isla de Muerta. They must fight the pirate Captain Barbarossa, who has the treasure. Captain Jack wins and they all go back to Jamaica. There, Elizabeth tells Will that she loves him. 1. Is Captain Jack sparrow a pirate? What is the name of his ship? 2. Who loves Elizabeth? 3. Who has the treasure? 4. Who wins the treasure? 5. Who does Elizabeth love? II. Read the film review, and then answer the questions. A Kid in King Arthur’s Court is directed by Michael Gottlieb. The main character in the film is a teenager called Calvin Fuller. Calvin is played by Thomas Ian Nicholas. This film is a modem retelling of Mark Twain’s classic book Connecticut Yankee. Calvin lives in California, USA. He is a very shy boy and he is not very good at sports. At the beginning of the film, Calvin is playing baseball when there is a terrible earthquake. A hole opens in the ground and Calvin falls through it. He lands in the past, in the time of King Arthur. Calvin meets King Arthur and Merlin, the wizard. King Arthur is played by Joss Ackland and Merlin is played by Ron Moody. They think that Calvin is amazing because he plays them modem music on his CD player and he shows them how to make rollerblades and a mountain bike. Calvin is trained to be a knight and he becomes more confident. Calvin helps King Arthur to beat his enemy, Lord Belasco, and then Merlin sends Calvin back to the future. Calvin finds himself back in the baseball game, but this time he wins the game. The special effects in A Kid in King Arthur's Court are very good. Michael Gottlieb is a great director and the actors’ performances are good. The film is funny and exciting. It’s a comedy, a drama, and an action film all in one. 1. What type is the film “A Kid in King Arthur ’s Court”? 2. Who is the main character? By whom is it played? 3. Who is the director of the film? Is he a good director? 4. What is Calvin doing when the earthquake happens? 5. How can he land in the time of King Arthur? 6. Why do King Arthur and Merlin think that Calvin is amazing? 7. Who is Calvin trained to become? 8. What does Calvin do to help King Arthur? 9. How can Calvin come back to the present time? 10. How are the special effects in the film? 11. How are the actors’ performances? 12. What does the writer think about the film?

Choose the word that has the underlined part pronounced differently from the others. 1. a. note b. hoping c. coke d. clock 2. a. kissed b. checked c. arrived d. laughed 3. a. dear b. bear c. near d. fear 4. a. teacher b. reach c. deaf d. team 5. a. your b. four c. pour d. hour II. Match the questions in column A with the suitable answers in column B. A 1. How was your vacation in Ha Long? 2. Who did you go with for lunch yesterday? 3. What did you see on your trip to Da Lat? 4. Where were you last night? 5. When did you see Jane? 6. What time did you go to the movie? 7. Did you take many photographs? 8. Were you at Hung’s birthday party last Sunday? 9. Why didn’t you go to Nam’s birthday party? 10. How did you get to work last Monday? B a. I saw her last week. b. Because I was tired. c. I went with my cousin. d. No, I wasn’t. e. I saw many different types of fish. f. It was wonderful. g. I walked. h. Yes, I did. i. I was at home. j. I went to see it at 8 pm. 1………; 2………; 3………; 4………; 5………; 6………; 7………; 8………; 9………; 10……… III. Choose the best answer (A, B, C or D). 1. Liz is a good friend of ……… She is American. a. me b. my c. mine d. I 2. Liz and her parents ……… to Ha Noi last year. a. come b. came c. coming d. to come 3. They rented an apartment ……… to mine. a. beside b. near       c. next door d. opposite 4. Last week, they ……… to a new apartment. a. left          b. leave       c. move        d. moved 5. It is ……… the other side of Ha Noi. a. by          b. on c. at          d. in 6. She ……… to visit us next week. a. comes b. came       c. is coming    d. come 7. The earrings were a .......... from my aunt. a. gift b. hobby c. poster d. material 8. Sorry! I'm busy tonight. I have an ............. with my doctor at 7 o'clock. a. opportunity b. occasion c. appointment d. activity 9. I'm glad .... you are feeling better. a. hear b. hearing c. to hear d. of hearing 10. You should wash your hands .... meals. a. after b. in c. before d. at

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