17, 92 lít hỗn hợp khí X gồm H2 và C2H2 có tỉ khối hơn so với N2 là 0,4, nhiệt phân hủy hỗn hợp với 51,2 gam O2. Sau PỨ làm lạnh hh để hơi nước ngưng tụ hết thu được hỗn hợp khí Y a) Viết PTPỨ b)Xác định % về thể tích và khối lượng hỗn hợp khí Y

KMnO4→Cl2→HCl →FeCl2→AgCl→ Cl2→FeCl2→FeCl3→Fe(OH)3

Giúp mình phần tự luận với,pleaseeee,mình cần gấp ạ

Giúp mình hoàn thành 5 câu này nha!

C. Reading VI. Read the passage and do the tasks below: WHO WANTS TO BE A MILLIONAIRE? One of the most popular quiz programmes on television in the world is called “Who Wants To Be A Millionaire?”. In Britain, the quiz master is Chris Tarrant. He asks the contestants fifteen questions. The first questions are easy but later they are more difficult. If you can answer the fourteenth question, you can win £500,000. You can win a million pounds if you can answer the last question. Of course, the last question is very difficult. All the questions on “Who Wants To Be A Millionaire?” are multiple-choice questions. After you hear the question, you see four answers. Only one answer is correct. You have to choose the correct answer. If you don't know the answer to a question, there are three ways you can get help: you can ask the quizmaster to take away two wrong answers: you can ask the studio audience which answer is right; or you can telephone a friend and ask for help. You can only do these things once. Very few people win the million pounds. The first person won a millon pounds one year after the programme started. Today, Who Wants To Be A Millionaire? can be seen in more than 100 countries and is now the world's most popular quiz programme. a. Find the words in the text with these meanings. 1. A TV programme where people answer questions. ................. 2. The person who ask the questions. ................. 3. The people who try to answer the questions. ................. 4. The people who watch the programme in the studio. ................. b. Answer the questions. 5. Who is the quizmaster in Britain?........................................................................... 6.How many ways can you get help?.......................................................................... 7. How many questions do you have to answer?........................................................ 8. In how many countries can you watch the quiz show?........................................... 9. How much do you win for the fourteenth question?............................................... VII. Fill in each blank with one suitable word: There (1) _________ a lot of cable television channels today. People also produce numerous interesting programmes to entertain people. The (2)___________ program tells us what is happening around the world. The (3)_________ makes us laugh and relax after long working hours. The (4)__________ has cute character. Some program can (5)_________ educate and entertain young children such as 'Let's Learn (6)_________ VTV2. My (7)________ program is the game show 'Who's a millionaire?'. My favorite (8)________ is Xuan Bac. He is very (9)_________.

Mọi người giúp em với ạ. Em cảm ơn nhiều

B. Vocabulary and grammar: III. Choose the best item among A, B, C or D to complete the sentences: 1. _________ is the most expensive city in the world? – I think it's Tokyo. A. What B. where C. when D. how 2. _________ is your favorite tennis player? – I don't like tennis. A. Where B. Who C. How often D. How long 3. My brother can't swim _________ he's afraid __________ water. A. because - of B. and - about C. but - of D. so - to 4. My sister likes going to the cinema _________ I like watching TV at home. A. and B. but C. because D. or 5. ___________ pen is this? Can I borrow it? A. Whose B. Whom C. Who C. Who 6. ___________ are you going to invite to your party next week? A. What B. Who C. Whose D. Where 7. ___________ did you spend in Hanoi? – One week. A. How many B. How much C. How long D. How often 8. ___________ is a person who reads a report in the programme. A. A weatherman B. a comedian C. a newsreader D. a guest 9. We use a __________ to change the channels from a distance. A. remote control B. TV schedule C. newspaper D. volume button 10. I want to watch the cartoon _________ I turn on the TV. A. but B. so C. although D. because 11. 'Let's learn' teaches children to study Maths. It's an __________ program. A. live B. popular C. entertaining D. educational 12. _________ Mai and Lan are interested in listening to music. A. because B. both C. neither D. so 13. The book is __________ the adventure of three close friends. A. on D. at B. from D. about 14. They invite special _____________ to appear in the show. A. character B. guests C. foxes D. audiences 15. Millions of children _________ the world enjoys the show. A. all B. in C. around C. over 16. The game show this week will test you general __________ about Amazon jungle. A. schedule B. knowledge C. fact D. adventure 17. The program can both _________ and entertain young audiences. A. educated B. education C. educational D. educate 18. The ___________ I like best is Xuan Bac. A. comedy B. comedian C. fun D. funny 19. Where are the children? They __________ in the yard. A. play B. are playing C. is playing D. plays 20. It’s cold now, ___________ we are wearing warm clothes. A. why B. but C. although D. so 21. People in over___________ countries can now watch “Let’s Learn”. A. 18 B. 80 C. 8 D. 53 22. VTV1 is a ___________ TV channel in Viet Nam. A. nation B. nationality C. national D. local 23. ___________ is the remote control? – It’s on the sofa. A. When B. What C. Where D. How 24. In Iceland, there is no TV on ___________ A.Mondays B. Wednesdays C. Thursdays D.Sundays 25. What___________ is it on? – HTV3 A. programme B. day C. channel D.radio IV. Give the correct form of the word in bracket: 1. That's the ____________ thing I've ever heard. (fun) 2. He laughed at their _______________. (stupid) 3. This is a romantic _______________. (comedian) 4. Xuan Bac is a famous __________ in Vietnam. (comedy) 5. How much does it cost to _______________ a child privately? (educational) 6. Watching television can be very _____________. (educate) 7. The aim of the series is both to _____________ and inform. (entertain) 8. 'Friends' is an _____________ film. (entertainment) 9. Dan Le is my favorite ______________. (weather) 10. The game show 'Who's a millionaire' is very ___________. (fame)

Cần gấp phần hình học bài 2 phần hình chỉ cần a b thôi ạ. Mình cảm ơn nhiều

Cho các số thực a, b, c không âm thỏa mãn không có hai số nào đồng thời bằng 0 và $a^{2}$ + $b^{2}$ + $c^{2}$ = 2(ab + ac +bc). Chứng minh rằng: $\sqrt{\frac{2ab}{a^{2}+b^{2}}}$ + $\sqrt{\frac{2ab}{a^{2}+b^{2}}}$ + $\sqrt{\frac{2ac}{a^{2}+c^{2}}}$ $\geq$ 1 Giúp mk với cacau ơiiii

A. Phonetics I. Choose the word whose underlined part is pronounced differently: 1. A. tooth B. clothing C. bath D. both 2. A. gather B. monthly C. father D. brother 3. A. though B. thank C. through D. thin 4. A. clip B. give C. twice D. stupid 5. A. studio B. clumsy C. cute D. stupid II. Choose the word whose main stress is placed different: 1. A. popular B. awful C. entertain D. stupid 2. A. clumsy B. educational C. entertaining D. documentary 3. A. national B. adventure C. program D. viewer 4. A. weatherman B. control C. remote D. schedule 5. A. favorite B. knowledge C. document D. memorial III. Give the correct form of the verb in bracket: 1. Look! The teacher (come)___________. She (have)__________ long black hair. 2. My father (drive)___________ me to school everyday. 3. Children shouldn't (buy)___________ firework at Tet Holiday. 4. Students must (go)____________ to school on time. 5. Where (be)__________Tom ? He (read)___________ books in the library. He (go)_________ to the library twice a week. IV. Make questions for the underlined part: 1. There are 40 students in my classroom. …………………………………………………………………………………….. 2. My brother is studying in his bedroom. ……………………………………………………………………………………… 3. My family usually goes to Da Lat on summer vacation. ……………………………………………………………………………………... 4. Her children often go to the club by bike. ……………………………………………………………………………………… 5. My favorite singer is David Archuleta. ……………………………………………………………………………………… 6. The show lasts two hours and a half. v. Rewrite the sentences: 1. There are a lot of interesting programs on VTV 3 → VTV 3…………………………………………………………………………… 2. My class has 42 students. →…………………………………………………………………………………… 3. My favorite cartoon on TV is 'Tom and Jerry' → I like…………………………………………………………………………….. 4. I enjoy watching TV. (interested) →…………………………………………………………………………………… 5. Phong is better than anyone in the class. → Duong is the……………………………………………………………………. 6. Minh is taller than Nga. → Nga is…………………………………………………………………………….