Cho m ga Fe tác dụng với HCl dư thu được m1 gam muối, cho m gam Fe tác dụng với Cl2 dư, đun nóng thu được m2 gam muối. So sánh m1,m2?

cm câu tục ngữ có chí thì nên em gấp lắm ạ thanks

Mong mọi người giúp mình với ạ Xin chân thành cảm ơn

1 ca nô đi từ A với vận tốc 12km/giờ . Ca nô khởi hành lúc 7 giờ 30 phút đến B lúc 11 giờ 15 phút . A . Tính độ dài quãng đường AB

cảm nhận của em về hình ảnh Bác Hồ ( trong bài Đêm nay Bác ko ngủ) (Viết đoạn văn ngắn) cảm nhận của em về Lượm (Viết đoạn văn ngắn)

Thấu kính phân kì có tiêu cực 10cm. Một quán AB cao 25cm cách thấu kính phân kì 30cm. Vẽ ảnh và nêu các tích chất của ảnh

Viết Chương Trình nhập vào 1 dãy số nguyên A gồm A1,A2,A3...,An (có |Ai|<=100) với n phần được nhập từ bàn phím tính tổng phần tử đầu và cuối rồi đưa kết quả ra màn hình Ai giúp em vs ạ em cần gấp ạ

Mark the letter A, B, C, or D to indicate the word whose underlined part is pronounced differently from that of the rest in each of the following questions. 1. A. garnishes B. preserves C. relaxes D. notices 2. A. ancient B. staple C. occasion D. afford Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions. 3. A. starter B. open C. punctual D. comprise 4. A. accessible B. simplicity C. stimulating D. efficiency Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions. 5. At first life was difficult for me because of I didn’t understand English. A B C D 6. Copper comes from seven types of ores that also contain the other materials. A B C D 7. Silicon chips contain thousands of circuits in an area as smaller than a fingernail. A B C D Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions. 8. He rarely forgets to do his homework, _______? A. doesn’t he B. is he C. does he D. isn’t he 9. You need to keep milk cold. Put it in the_______. A. cupboard B. basin C. Fridge D. freezer 10. My brother is eleven. He is still a/ an_______. A. child B. Teenager C. adult D. infant 11. Ona clear night, the moon_______so brightly that you can see your shadow. A. shines B. is C. Seems D. pours 12. Tom_______a lot of presents on his birthday. A. gave B. was giving C. was given D. was been given 13. You look terrific today! That color really_______you! A. wears B. matches C. Fits D. suits 14. The _______of the experiments proved to be very informative. A. consequences B. solutions C. effects D. results 15. Children should be_______to realize their full potential. A. encouraging B. courageous C. encouraged D. discouraged 16. The food was so hot _______. 2 A. that it burned my tongue B. for it to burn my tongue C. and then it burned my tongue D. to have burned my tongue Mark the letter A, B, C, or D to indicate the most suitable response to complete each of the following exchanges. 17. - "Well done! That's a very nice picture!” - “_______” A. Thanks. It's nice of you to say so. B. Wow. What's a nice compliment! C. Yes. I think so too. D. Right. I've painted a nice picture. 18. - “Must I finish my homework now?" - “_______” A. Yes, you may. B. Yes, you need. C. No. you can't. D. No, you needn't. Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 19. The graduation is sad, because the time we studied together has come to an end. A. succeeded B. begun C. finished D. changed 20. Under the major's able leadership, the soldiers found safety. A. guidance B. intensity C. flagship D. ability Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. 21. If you follow these simple rules, not only will you save money, but also the environment will be cleaner. A. earn B. count C. waste D. replace 22. Animal communication is not a straightforward subject. It's complicated because animals communicate differently with each other. A. impossible to express B. difficult to understand C. easy to interpret D. interesting to study Read the following passage and mark the letter A, B, C, or D to indicate the correct word that best fits each of the numbered blanks. The Atacama Desert is situated in South America. It is found near (23) _______thirtieth parallel south of the equator. (24) _______, the Sahara and the Rub’alKhali deserts of northern Africa and nearby Saudi Arabia are 30° north of the equator. (25) _______the Kalahari Desert of Southern Africa is about 30° south of it. The Gobi Desert of central Asia (26) _______a little farther than 30° north, at about 45°, while the Great Sandy and Gibson deserts of Australia fall back into the pattern, lying 30° south of 3 the equator. This pattern is no (27) _______. All the hot deserts are found about the same distance north or south of the equator. 23. A. a B. the C. this D. that 24. A. Equally B. Consequently C. Similarly D. Differently 25. A. where B. whereas C. though D. when 26. A. lies B. stays C. locates D. stands 27. A. chance B. accident C. opportunity D. coincidence

Cho hai điểm A(1;10) và B(13;6). A) Lập phương trình đường tròn đường kính AB. B) Lập phương trình tiếp tuyến của đường tròn đường kính AB tại điểm A.

Giải bài giúp em với ạ, em đang cần gấp để mai thi rồi ạ.