Đáp án:
Bạn tham khảo lời giải ở dưới nhé!!!
Giải thích các bước giải:
Cách làm: Cho dây sắt có quấn mẫu than hồng vào lọ khí oxi
Hiện tượng: Mẫu than hồng cháy tạo ra nhiệt độ cho dây sắt cháy. Dây sắt tạo ra các hạt sắt cháy nhỏ sắt (II,III), không có khí tạo ra. Màu xám của sắt chuyển thành màu nâu
Điều kiện: Nhiệt độ
\(3Fe + 2{O_2} \to F{e_3}{O_4}\)
$3Fe$ + $2O_{2}$ → $Fe_{3}$ $O_{4}$
$Điều$ $kiện$ $phản$ $ứng:$ $t^{0}$ ($nhiệt$ $độ$ $cao)$
Help meeeee:(( Hứa vote 5*, CTLHN
Ai giải hộ e với Em dg cần gấp ạ Trước 8 h
Vẽ among ú..........................!
kiểm tra bài cũ về unit 8 skills 1 sách tiếng anh tập 2 lớp 6 là gì ạ ?
Giúp mình câu này với . Mình đang cần gấp ạ .Camr ơn mọi người.
1) Someone views this page. 1 điểm This page is viewed This page is being viewed by someone This page is being viewed. 2) She cleans the floor everyday. 1 điểm The floor is clean by she everyday. The floor is cleaned everyday. The floor is to be clean everyday. 3) They will offer her the award soon. 1 điểm She will be offered the award soon. The award will be offered to her by they soon. She will be offered them the award soon 4) People can use this device easily. 1 điểm This device can to be used easily This device can to be easily used. This device can be used easily. 5) They should reconsider the decision. 1 điểm The decision should to be reconsidered. The decision should be reconsidered. The decision should be reconsider by they. 6) Someone will speak to the manager. * 1 điểm The manager will be spoken to. The manager will to be spoken to. The manager will be spoken. 7) They haven't brought the book back yet. 1 điểm The book haven't been brought back yet. The book haven't been brought yet back. The book hasn't been brought back yet. 8) They will buy the ship. 1 điểm The ship is being gone to be bought. The ship will buy. The ship will be bought. 9) They don't use machines there. 1 điểm Machines there are not used Machines are not used there. Machines don't be used there. 10) We made mistakes. 1 điểm Mistakes was made. Mistakes were made. Mistakes had been made Mục khác:
Giúp mình với ạ T2 nộp rồiiiiiiiiiiiiiiiii
1. This house __________ in 1970 by my grandfather. * 1 điểm a) Built b) Was built c) Was build d) Has built 2. The robbers ————————- by the police. * 1 điểm a) Have arrested b) Have been arrested c) Was arrested d) Had arrested 3. We ———————- for the examination now. 1 điểm a) Have preparing b) Are preparing c) Had preparing d) Have been prepared 4. It ——————— since yesterday. 1 điểm a) Is raining b) Has been raining c) Have been raining d) Was raining 5. This machine ————————- for five hours. 1 điểm a) Have been using b) Has been used c) Was using d) is using 6. The students ———————- to submit their reports since this week. * 1 điểm a) Have been asked b) Are asked c) Has asked d) were asking 7. As the patient could not walk he ———————– home in a wheelchair. 1 điểm a) Has carried b) Has been carried c) Was carried d) Was carrying 8. The students ——————— for lying by the teacher. 1 điểm a) Have been punished b) Punished c) Is punished d) Was punished 9. I ——————— to become a successful writer. 1 điểm a) always want b) Am alwys wanted c) Was always wanted d) Am always wanting 10. The injured people ———————- to the hospital in an ambulance. 1 điểm a) Were taking b) Was taking c) Were taken d) Have taken
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