How can you calculate an empirical formulaif you are given the percent of each e

Question

   How can you calculate an empirical formulaif you are given the percent of each element present but not themolar mass? For example, my question is The compound adrenaline contains 56.69% C, 6.56% H, 28.37% Oand 8.28% N by mass. What is the empirical formula? You don't have to work them all out just one of the elementsso I can get the idea. Thanks!    How can you calculate an empirical formulaif you are given the percent of each element present but not themolar mass? For example, my question is The compound adrenaline contains 56.69% C, 6.56% H, 28.37% Oand 8.28% N by mass. What is the empirical formula? You don't have to work them all out just one of the elementsso I can get the idea. Thanks!

Explanation / Answer

The atomic masses provide a moles per gram conversion factor.Using the conversion factor, we can calculate the moles of eachelement:

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