Recall that mass percent is given by:
Assuming we have 100 g of the compound, this means we have 40.00 g C, 6.72 g H, and 53.28 g O.
Now, we need to get the moles of each element in the compound.
The atomic masses are 12.01 g/mol C, 1.01 g/mol H, and 16.00 g O.
= 3.33 mol C
= 6.65 mol H
= 3.33 mol O
Divide the number of moles of each by the smallest value.
Fructose is a common sugar found in fruit. Elemental analysis of fructose gave the following mass percent composition: C 40.00%, H 6.72%, O 53.28%. The molar mass of fructose is 180.16 g/mol.
Find the molecular formula of fructose.
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