Help determining empirical/molecular formula from given mass data

timer Asked: Sep 17th, 2015

Question description

Having a lot of trouble getting started. The question is:

The combustion of 40.5 mg of a compound containing C, H, and O produces 110 mg of CO2 and 22.5 mg of H20. The molar mass of the compound is 162 g/mol. Determine the empirical and molecular formulas.

I don't know how to approach this problem because I've usually been given the mass percents of each element in the unknown compound. Not sure how to use what I've been given to determine the formulas. 


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