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tuyeulaybanthan
2 năm trước
Dẫn từ từ 8,4g hỗn hợp X gồm but-1-en và but-2-en lội chậm qua bình đựng dung dịch Br2,khi kết thúc phản ứng thấy có 24 gam brom phản ứng Xác định thành phần phần trăm khối lượng but-1-en và but-2-en có trong hỗn hợp X
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