October 10, 2015

Homework Help: Chemistry

Posted by Chopsticks on Saturday, January 24, 2009 at 7:00pm.

Sometimes, instead of percentages compostion, you will have the composition of a sample by mass. Using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses.

a .858g sample of an unkown substance is composed of .537g of Copper, and .321g of Florine

How would you do this problem? When doing empirical formula, I only know how to do it if its a percentage. Should I divide the amount of copper over the total of the unknown substance to get a percentage and then convert to moles? Help.

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