Chemistry 3A
posted by Gurjot on .
calculate the empirical formula for an unknown compound from the following information: C= 39.2%, H= 8.73% and O= 52.1%

Take a 100 g sample which will give you
39.2g C
8.73 g H
52.1 g O
Convert grams to mols. mols = grams/molar mass
Find ratio of elements to each other with the smallest number being 1.00. The each way to do that is to divide the smallest number by its self, then divide the other numbers by the same small number. I think you will need to find a common multiplier to obtain whole numbers. Post your work if you get stuck. 
i got it... thank you