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March 28, 2017

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Xylose, a sugar isolated from wood, has the empirical formula CH2O. If a 6.25 mole sample
of xylose has a mass of 938.3 g, what is xylose's molecular formula?

  • Chemistry - ,

    mols = grams/molar mass
    Solve for molar mass.

    Then empirical mass is
    C = 12
    H = 2
    O = 16
    -------
    30
    molar mass = empirical mass*x
    Solve for x and substitute into
    (CH2O)x or you can write it as CxH2xOx

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