user-avatar
trminh131203
2 năm trước
Cho `49,4\ gam` hỗn hợp `X` chứa `Fe_xO_y,CuO,Al_2O_3`. Dẫn `H_2` dư vào `X` nung nóng ở `t^o` cao, kết thúc phản ứng thu rắn `B`. `B` tác dụng đủ `200\ l\ ddNaOH\ 1M` thu rắn `C`. Cho `C` vào dung dịch `HCl` dư thu `6,72\ l\ H_2(đktc)` và còn `12,8\ gam` không tan. Tìm `Fe_xO_y`
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

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

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team