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tach nuoc tu u hon hop A gom hai ancol X,Y (MX<My)sau phan ung thu dc hon hop B gom 2 an ken ke tiep trong day dong dang dot chay hoan toan B can 1,8 mol O2 .mat khac neu tach nuoc khong hoan toan thu duoc 11,76g hon hop cac ete . biet hieu suat ete hoa cua Y la 50% ,tinh hieu suat ete hoa cua X
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