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Cho 62,4g dung dịch gồm phenol, rượu etylic có lẫn nước tác dụng với kim loại Na thu được 11,2l khí (đktc). Nếu cho hh trên tác dụng với 200ml dung dịch NaOH 2M thì vừa đủ a) Tìm %m mỗi chất trong hh b) Suy ra C% của phenol
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