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boyhoang011
2 năm trước
Cho 1,21g hỗn hợp A gồm Mg,Zn,cu tác dụng dụng hoàn toàn với oxi dư ,thủ được hỗn hợp rắn B có khói lượng 1,61g .tính thể tích dung dịch HCl 2M cần dùng để hòa tan hết B
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