Đáp án:
Giải thích các bước giải:
1, Ta có: nZn= 0,22 mol nS= 0,2 mol
PTHH: Zn+S=ZnS
Vậy chất tạo thành là ZnS.
Vì nZn > nS => Zn dư => mZnS = 0,2 * 97=19,4(g)
2,
Dài quá nhác làm
câu 1 cho mình hỏi là cái bài nghe này lấy ở đâu ạ các bạn ghi rõ unit và ghi rõ ràng tên sach ra hộ mình nha có hình ảnh thì càng tốt ? câu 2 cái hình sách tiếng anh tập hai đó đúng ko ạ ? lúc nãy mình hỏi có người nói là ở sách tiếng 9 tập 2 có đúng ko ạ làm ơn đó giúp mình với
IV. Choose the best word or phrase (A, B, C or D) to complete each sentences. 16. My uncle usually practises ______ boxing every afternoon. He's a professional boxer. A. playing B. doing C. going D. watching 17. In the winter, we usually go ______ in the snowy mountainous centre. A. cooking B. sunbathing C. skiing D. cycling 18. He played _____ with his father at home yesterday. A. Judo B. running C. chess D. karate 19. My mother bought me a new ______ two days ago, so I intend to go skating with my friends. A. chessboard B. skateboard C. paper kite D. ball 20. She wore _____ when she swam in the sea last week. A. sport shoes B. glasses C. goggles D. skis 21. His _____ was broken, so he couldn't play tennis with his friend last evening. A. equipment B. bicycle C. boat D. racket 22. My brother _____ three goals for his team in the final match. A. scored B. paid C. picked D. threw 23. Pele is regarded ____ one of the most famous footballers in the world. A. from B. as C. into D. of 24. My mother _____table tennis very well when she was five years old. A. plays/was B. played/was C. is playing/ was D. played/ were 25. The weather _______ quite cold yesterday, so we _______ swimming and _____ at home all day. A. was/ didn't go/ was B. was/ went/ wasn't C. was/ didn't go/ were D. were/ went/ weren't 26. I _______ him two months ago. We ________ a drink together in a coffee house, and then we _____ a walk in the park. A. met/ had/ took B. didn't meet/ have/ take C. meet/ had/ took C. met/ didn't have/ took 27. He _____ a ticket to see a tennis match three days ago, but he ____ it yesterday. A. buys/ finds B. bought/ found C. didn't buy/ found D. bought/ didn't find 28. My father is sleeping now, ______! A. Don't turn down the volume, please B. Turning up the volume, please. C. Turning down the volume, please. D. Turn down the volume, please 29. ______ the announcement, please! A. Keep silent B. Take notice of C. Take part in D. Bring along 30. ______! You'll be overweight. A.Don't eat fast food too much B. Don't play badminton C. Go to sleep early D. Listen to my advice
2, match a line in column A with a line in column B to make a meaningful A B 1)if people use public transport a.i can't sleep 2)you'll learn english more easily b.will you give her flowers? 3)if they don't give him the job c.if he does exercise regularly 4)if i drink coffee at night d.i don't know what he will do
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làm câu 2 giải từng bước vẽ hình
Kẻ thù chính của phong trào độc lập dân tộc ở một số nước Đông Nam Á những năm 1940 là A: chủ nghĩa đế quốc và phong kiến tay sai. B: chủ nghĩa đế quốc, phát xít. C: chủ nghĩa phát xít. D: chủ nghĩa đế quốc. 15 Sự kiện nào tác động đến sự thay đổi cục diện diễn biến cuộc Chiến tranh thế giới thứ nhất (1914 – 1918)? A: Phe Hiệp ước liên tiếp mở các cuộc tấn công. B: Mĩ nhảy vào tham chiến. C: Cách mạng tháng Hai bùng nổ ở Nga. D: Đức đầu hàng đồng minh vô điều kiện.
Giúp mik làm bài 1 và 2 nha mik đang cần gấp👌
I . Choose the word (A, B, C or D) whose stress is different from the others. 1. A. modern B. tennis C. exhaust D. useful 2. A. equipment B. exercise C. volleyball D. usually 3. A. sporty B. active C. create D. racket 4. A. sportsperson B. aerobic C. marathon D. skateboarding 5. A. national B. article C. badminton D. achievement II. Choose the word (A, B, C or D) whose underlined part is pronounces differently. 6. A. aerobic B. airplay C. rarely D. atmosphere 7. A. unfair B. prepare C. nearly D. airplane 8. A. fairy B. really C. volunteer D. idea 9. A. parent B. reindeer C. upstairs D. careful 10. A. careless B. downstairs C. armchair D. fearful III. Choose the correct form of the words (A, B, C or D) to complete the sentences. 11. Tom! You won the first prize in the karate competition. A. Congratualating B. Congratulations C. Congratulation D. Congratulates 12. ______aerobics is one of the effective ways to lose weight A. Did B. Do C. Doing D. To do 13. Last week, I went _____ with my cousins at the park. A. cycling B. to cycle C. cycle D. cycled 14. It's ______ for you to go swimming every weekend because you can increase your height. A. useful B. using C. used D. useless 15. We cheered _____ when we saw our favourite basketball team on TV. A. louder B. loudest C. loud D. loudly
Put these words in their correct order to make meaningful sentences 1,cinema / boy / often / the little / does / go / How / to / the ? 2, his / mother / him / His / gift / birthday / bought / sixteenth / for / that / on. 3, to / too / box / The / lift / woman / a / is / such / weak / big .
Chọn A,B,C,D dùm ạ. Đừng chọn bừa nha! Vote 5 sao, cảm ơn,...
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