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huevan.tqd
2 năm trước
Hòa tan hoàn toàn 94,2g hỗn hợp Fe và Al2O3 trong dd H2SO4 2M thì thu đc 3,36l khí H2 (đktc). Tính khối lượng Al2O3 và tính thể tích dd H2SO4 đã dùng.
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