Homework Help: Chemistry

Posted by Margie on Monday, April 23, 2012 at 9:34pm.

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 - DrBob222, Monday, April 23, 2012 at 9:45pm
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 C_xH_2xO_x

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