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.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Molecular Formula concept. You can view video lessons to learn Molecular Formula. Or if you need more Molecular Formula practice, you can also practice Molecular Formula practice problems.