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linhngocc3hv
2 năm trước
Cho 1 luồng khí CO đi qua ống sứ đựng m(g) Fe2O3 nung nóng sau một thời gian thu được 13,92 gam hỗn hợp X . X gồm Fe, FeO, Fe2O3 và Fe3O4. Cho X tác dụng với HNO3 đặc nóng được 5,824 lít khí NO2 ở đktc. Tính thể tích khi CO đã dùng (đktc) và m
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