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trankhanhly20062003
2 năm trước
Cho 0,1 mol -amino axit phản ứng vừa đủ với 200 ml dung dịch HCl 0,5M thu được dung dịch A. Dung dịch A tác dụng vừa hết 600 ml dung dịch NaOH 0,5M. Số nhóm − NH 2 và -COOH của -amino axit lần lượt là
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