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    Identifying Carbohydrates

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    An unknown carbohydrate could be reduced by a series of steps to a compound with five carbons. It does give a positive Benedicts test and it has two chiral carbons. What is the structure consistent with these facts?

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    What do we know?

    1. The sugar is a five-carbon sugar.
    2. The sugar is a reducing sugar, since it gives a positive reaction with Benedict's test.
    3. The sugar has only two chiral carbons.

    A ...

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    This solution includes a complete explanation. 131 words.