Cho 6,72 l hỗn hợp x gồm metan, etilen và Axetilen -dẫn 2,24 lít hỗn hợp X tác dụng AgNO3/ NH3 thu được 12 gam kết tủa - Dẫn 3,36 l hỗn hợp X tác dụng Br2 dư thu được 1,12 lít khí không bị hấp thụ a. Viết phương trình b.tính thể tích mỗi khí ban đầu c. Tính phần trăm khối lượng khí ban đầu

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