user-avatar
qbuithi02
2 năm trước
11. Dẫn 0,3 mol hỗn hợp gồm etilen và axetilen qua dung dịch AgNO3/NH3 dư thu được 24 g kết tủa. % thể tích etilen trong hỗn hợp ban đầu là ? 12. Cho 2,24 lít (đktc) hỗn hợp X gồm C2H4 và C2H2 lội chậm qua bình đựng dung dịch Br2 dư thấy khối lượng bình tăng thêm 2,7 gam. % theo thể tích của C2H4 trong hỗn hợp X là?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

.2. We are too late. The plane ............... off ten minutes ago. a. has taken b. took c. had taken d. was taken 3. “What a lovely boat!” “I ...............half a year building this boat.” a. spend b. spent c. spending d. have spent 4. How ............since we ............school? a. are you/ left b. have you been/ have left c. were you/ left d. have you been/ left 5. I think John ..............tomorrow. a. would come b. come c. will come d. comes 6. After he ------------ his driving test he bought a car. a. had passed b. pass c. passed d. passing 7. When I got to the office, I ----------- that I had forgot to lock the door. a. realized b. had realized c. realize d. have realized 2 8. When she was 21 she -------------- across the United States. a. drove b. drive c. driven d. was driving 9. He often ------------ so nervous before his exams. a. feels b. felt c. was feeling d. had felt 10. How long have you ------------- he was a liar. a. been knowing b. knew c. know d. known

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