posted by Jerry on .
A compound is 54.52% C, 9.15% H, and 36.32% O by mass. What is the empirical formula?
The molecular mass of the compound is 132 amu. What is the molecular formula?
Take a 100 g sample, convert percent to grams.
Convert grams each to moles.
Then find the ratio as in your other problems.
Determine the mass of the empirical formula, then find (molar mass/empirical mass) = n and round to a whole numbers.
(empirical formula)n is the molecular formula. Post your work if you get stuck.