Dẫn 6,72 lít hỗn hợp 2 khí metan và etylen qua bình đựng dung dịch brom dư sao cho phản ứng xảy ra hoàn toàn. Chất khí thu được sau phản ứng đem đốt cháy trong không khí, rồi dẫn toàn bộ khí thu được qua dung dịch nước vôi trong dư thấy tạo thành 20g chất không tan màu trắng. Tính thành phần phần trăm theo thể tích của mỗi khí có trong hỗn hợp ban đầu ?

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