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anhtuphan53
2 năm trước
Hỗn họep x gồm sắt(3)oxit và nhôm oxit.Cho hidro đi chậm qua ống sứ đựng 36.4g hỗn hợp X cho đến khi phản ứng xảy ra hoàn toàn.trong ống sứ còn 31,6g chắt rắn.tính%m các chất trong hỗn hợp x
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