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giang2k8
2 năm trước
hh X gồm Mg , Cu , ,CuO . cho 16,4g hh X + 600ml đ HCl 1M sao cho phản ứng hoàn toàn thành dd Y và 4,8 chất rắn ko tan . cho dd Y phản ứng hết 120 ml đ NaOH 0,5 M . lọc kết tủa rồi nhiệt phân sao cho khối lượng ko đổi . sau phản ứng tạo thành 14g chất rắn A . tính CM dd Y B. % m Mg , Cu , CuO
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