Lm ho minh b4 b5 vs Minh dang rat rat la gap

Giúp mik câu này với mn ơi mik cảm ơn ạk

Đốt cháy hoàn toàn 9,2 gam một chất hữu cơ A, người ta thu được 8,96 lít khí CO2 (ở điều kiện tiêu chuẩn) và 10,8 gam H2O. a. Lập công thức phân tử của A, biết rằng ở điều kiện tiêu chuẩn 1 lít hơi chất này cân nặng 2,054 gam. b. Viết công thức cấu tạo của A, biết A tác dụng được với Na. c. Tính lượng axit axetic phản ứng hết với 9,2g rượu etylic thu được etyl axetat.

Một hình tròn có chu vi là 31,4dm. Hãy tìm diện tích hình đó?

Tính chu vi và diện tích hình tròn biết bán kính bằng 0,5 dm

Quan sát vị trí địa lí của châu Mỹ và những thông tin thu thập được từ hiểu biết của bản thân, từ sách giáo khoa. Hãy viết ra những đặc điểm của châu Mỹ (Vị trí, diện tích, tiếp giáp, phạm vi lãnh thổ) Vị trí địa lí (nằm ở bán cầu nào)? Diện tích, đứng thứ mấy trong các châu lục? Năm tìm ra châu Mỹ? Ai là người tìm ra châu Mỹ? Tiếp giáp với những đại dương nào? Phạm vi lãnh thổ (theo vĩ độ) Nơi hẹp nhất châu Mỹ ở đâu? Kênh Panama có ý nghĩa như thế nào?

giúp mình bài 10 ko s pam cảm ơn mn nhìu

Kết quả nào sau đây là đúng A.(-3)-(4-6)=-1 B.(-3)-(4-6)=-5 C.52-(48-52)+48=0 D.-52-(48-52)-48=0

6/. Cho 11,8 gam hỗn hợp Al và Cu tác dụng với dd HCl dư thì có 6,72 lít khí thoát ra (đktc). a/. Tính khối lượng mỗi kim loại trong hỗn hợp. b/. Tính khối lượng dung dịch HCl 18,25% cần dùng.

3) Rewrite these sentences using the cues provided with SO/SUCH?TOO/ENOUGH 1) We went to bed early because we were very tired.à We were so…………………….. 2) The lesson is very difficlut. We can’t understand it.à It is such………………………………….. 3) The car is so old that he doesn’t want to drive it.à It is such………………………….. 4) The weather was very cold. We couldn’t go out.à The weather was too……………... 5) The film was so interesting that we couldn’t miss it.à It was such……………….. 6) David has too many girlfriends . He can’t remember all of their names.à David has so………………... 7) Tome drive too fast, so he often causes accidents.à Tom drives so……………………. 8) This is good tea. I think I’ll have another cup.à This is such…………………………..... 9) John was very angry. He couldn’t say anything.à John was too…………………………….. 10) These exercises are so long that I can’t finish them in an hour.à They are………………. 11. She is old. She can work by herself. (Enough)à She is………………………………………… 12. The boy is intelligent.He can understand you. (Enough)à The boy is…………………………… 13. Mai is good. She can pass the examination. (Enough)à Mai is………………………………………… 14. The story is short. We can read it in one hour. (Enough)àThe story is…………………………………… 15. The film was very good. We saw it through. (Enough)à The film was…………………………………… 16. The play was very amusing. They enjoyed it. (Enough)à The play was…………………………… 17) The children were very late.They couldn’t see the display of fireworks.  (Too)à It was….. 18)Your brother is very young.He can’t go swimming. (Too)à He is…..………..…….. 19) The sound is very low.We can’t hear it. (Too)à The sound was………………………….. 20) This book is very difficult.I can’t read it. (Too)à This book is……………….. 4. Viết lại câu không thay đổi nghĩa: 1) The room is so tidy that it took us one hour to clean it.=> It is .... 2) The man is so fool that no one took any notice of him.=> He is .... 3) The film is so long that they can't broadcast it on one night.=> It is ..... 4) The books are so interesting that we have read them many times.=> They are..... 5) The news was so bad that she burst into tears on hearing it.=> It was.... 6) The food was so hot that it turned my tongue.=> It was..... 7) There is so much rain that we can't go out.=> There is such.... 8) The boy is so fat that every calls him Stuffy.=> He is .... 9) The milk is so excellent that all the children want some more.=> It is .... 10) The weather was so warm that they had a walk in the garden.=> It was.... 11) There were so many people in the hall that we couldn't see him.=> There were such... 12) The match was so exciting that all the fans shouted loudly.=> It was... 13) They drank so much coffee that they couldn't sleep all night.=> They drunk such..... 14) Alice had so many exercises to do that she couldn't go out.=> Alice had such..... 15) The woman was so poor that she needed everyone's help.=> She was ..... 5. Viết lại câu dùng TOO.....TO...
1) The weather is so bad that we can’t go out.=> The weather is too…….. 2)