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ngogiasam
2 năm trước
Cho m gam Fe vào 200 ml dung dịch CuSO4 xM, sau khi các phản ứng xảy ra hoàn toàn, thu được (m + 0,8) gam hỗn hợp kim loại. Giá trị của x là giúp em vơi ạ
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