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momo8102002
2 năm trước
8. Đốt cháy hoàn toàn 6 mg một chất hữu cơ X trong oxi dư thu được 4,4 mg CO2 và 3,6 mg H2O. Mặt khác, oxi hoá hoàn toàn 9,0 mg X bằng CuO dư thu được 3,36 ml khí N2 (đktc). Kết luận nào sau đây là không đúng? A. %C = 20%. B. %H = 6,67%. C. %N = 46,67%. D. %O = 13,33%.
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