Câu 1: Đốt cháy hoàn toàn 4,48 lít hai anken đồng đẳng kết tiếp của nhau (đktc) thu được 11,2 lít CO2 (đktc). Tìm CTPT của 2 anken đó. Câu 4: (3,0 điểm): Dẫn 4,48 lít hỗn hợp 3 khí etan, etilen, axetilen qua dung dịch brom (dư) thì thấy có 1,12 lít khí thoát ra ngoài. Cũng dẫn 4,48 lít khí trên qua dung dịch AgNO3/NH3 thì thấy có 21,6g kết tủa ( các khí đo ở đktc). a. Viết phương trình phản ứng xảy ra. b. Xác định phần trăm về thể tích của mỗi khí trong hỗn hợp đầu (Ag =108)

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