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Một hỗn hợp X gồm có etan, etilen và Propilen. Khi cho X qua d d Bạc nitrat trong nước amniac thu được hh khí Y và 14,7 g kết tủa, Cho hh khí Y vào d d nước Brom thấy khối lượng bình Br2 tăng 5,6 gam và thu được khí Z. Đốt cháy Z thu được 2,24 lít khí CO2. Tính % thể tích mỗi khí trong hỗn hợp X.
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