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nguyenxuan0310nd
2 năm trước
Ngta điều chế kẽm oxit = cách đốt bột kẽm trong oxi. A.tính khối lượng kẽm và khí oxi cần để điều chế 81g ZnO. B.muốn có lượng oxi trên câdn phân huỷ bao nhiêu gam kclo3, biết hiệu suất phản ứng là 80%.
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