Determine the empirical formula of a compound that is 39.99% carbon, 53.28% Oxygen and 6.73% Hydrogen

Explanation:

39.99% C

53.28% O

6.73% H

First step:

Change % to g

39.99g C

53.28g O

6.73g H

Second step:

Calculate the number of g/mol using atomic mass.

Third step:

Determine the smallest number of moles and divide each compound by it. When you get the result, simply put the whole number, not decimals.

Fourth step:

Rewrite those number under the compounds.

This empirical formula should be:

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