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Son123
2 năm trước
Câu 1:Cho 2,98 g hỗn hợp Zn và Fe tác dụng với dung dịch HCl thấy tan hết,thoát ra khí H2(đktc) và thu được 6,53 g muối.Tính V và phần trăm khối lượng các chất ban đầu
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