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trannga3825
2 năm trước
Crackinh $C_{4}H_{10}$ thu được 35 lít hỗn hợp X gồm CH4, C2H6, C2H4, C3H6, C4H8, C4H10 và H2. Cho toàn bộ X đi qua dung dịch nước Brom dư thấy thoát ra 25 lít hỗn hợp Y. Các khí đều đo ở đktc.Hiệu suất phản ứng crackinh? A. 20% B. 40% C. 60% D. 80%
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