giúp mình bài này ạ, mình cảm ơn nhiều ạ

Hãy giải thích sự hình thành liên kết giữa nguyên tử h và ntu s và nt o trong phân tử h2so4

72 + 36,2 + 24 . 3 + 18 . 4 + 12 . 6 + 168 =

Tìm và sửa lỗi sai 1. Why did Danny, whose totally unfit, decide to enter the marathon? 2. Miranda still has trauma from the tragic accident, that took away her closest friend. 3. The office furniture that was ordered last month have just arrived, but we're not sure whether the manager likes it. 4. Mr. Smith whose car was stolen yesterday, is a professo 5. My uncle, was a businessman, was ranked the weathiest of the country 6. She was the first woman in the Philippines to elect as the president of the countr 7. We should participate in the movements organizing to conserve the natural environment. 8. Jack has won a jackpot prize, 10% of whom was donated to flooded areas. 9. All her children have graduated from university, that is the reason for her to be proud. 10. Mrs. Brown was the first owner his dog won 3 prizes in the same show 11. Many of the pictures were sent from outer space are presently on display in the public library. 12. This class, where is a prerequisite for microbiology, is so difficult that I would rather drop it. 13. The General Certificate of Secondary Education (GCSE) is the name of a set of English qualifications, 14. generally taking by secondary students at the age of 15 - 16 in England. 15. Drying food by means of solar energy is an ancient process applying wherever climatic conditions make it possible. 16. Salmon lay their eggs, and die in freshwater although they live in salt water when most of their Aadults lives. mn giúp e với ạ. em đang cần gấp

Bằng phương pháp hóa học nhận biết dd các chất sau: na2co3,koh,bacl2,k2s,h2so4,hno3,ba(oh)2,hcl,kno3

Làm đề 7 Làm bài văn dài một chút

làm ơn giúp mình đi trước 2h chiều nay ạ. Gấp lắm TvT O^O.

GIÚP EM VỚI MỌI NGƯỜIIIIII:{{{ 1. Due to its high price, we didn't rent the flat. (As) --> 2. Keiko ordered her meal without meat because she is a vegetarian. --> Owing to 3. Because of his great cooking, we love going to dinner at Taka's house.(Since) --> 4. I was very happy with my present as it was exactly what I wanted. (Since) --> Since 5. She couldn't come to the party as she had to work. (because) -->

Hợp chất A1(NO3)x có phân tử khối là 213.Tính hóa trị của A1 trong công thức biết nhóm NO3 có hóa trị (I)

Giải hộ mình với bài mày khó lắm