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anh2003
2 năm trước
Hòa tan 5, 6 gam Fe vào 100 ml dung dịch X gồm HCl 0,2M và `H_2SO_4` 0,1M, thu được dung dịch chứa m gam muối. Tìm m. (Làm theo cách bảo toàn H)
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