S
sandy_26
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Nung m gam hon hop X gom FeS va FeS2 trong 1 binh kin chua khong khi gom 20% oxi va 80% nito ve the tich. Den khi cac phan ung xay ra hoan toan thu duoc 1 chat ran duy nhat va hon hop Y co 84,8% nito; 14%SO2; con lai la oxi. Tinh phan tram theo khoi luong FeS trong hon hop X ban dau.
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