cho 3,36 l hỗn hợp gồm 1 anken và 1 ankan đi qua dung dịch brom dư thấy có 8g brom tham gia phản ứng .biết rằng khối lượng 6,72 lít hỗn hợp là 13 gam . xác định công thức phân tử của anken và ạkan trên.

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