Giúp mình với mình đang cần gấp 😭 Bài 31: Một hỗn hợp khí A gồm 2 Hỉđrôcacbon X, Y có cùng số nguyên tử C, khi đốt cháy hoàn toàn 8,4 gam A thì thu được 10,8 gam H2O. dA/N2 = 1,5. a. Lập luận tìm số nguyên tử C của X, Y.​ b. Xác định CTPT X, Y và % thể tích của hỗn hợp A.

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