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quanpham231206
2 năm trước
Cho 55,2 (g) gồm 2 oxit kim loại là FeO, Al203 tác dụng với 700ml dung dịch HCl 2M sau phản ứng thu được dung dịch A. Cô cạn dung dịch A thu được m(g) muối khan. Tính m (giải hệ phương trình x,y)
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