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tuyendat8881
2 năm trước
giúp mình với mình cần gấp ạ Khí Axetilen C 2 H 2 khi cháy trong oxi nhiệt độ của ngọn lửa có thể lên tới 3000 0 C, nên được ứng dụng trong đèn xì oxi – axetilen để hàn và cắt kim loại. a) Trong thí nghiệm, khí axetilen được điều chế từ chất nào? Viết PTHH minh họa b) Em hãy viết PTHH đốt cháy khí axetilen. c) Tính thể tích không khí (đktc) cần dùng khí đốt cháy hoàn toàn 4.48 lit Axetilen C 2 H 2 (đktc).
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