Question
To find the empirical formula from the percent composition by mass, ____
Answer
To find the empirical formula from the percent composition by mass, pretend the sample weighs exactly 100 g. Now each percentage translates directly to number of grams. Dividing the grams by at.omic weight gives the number of moles. Next, dividing by the greatest common factor yields the ratio of atoms of each element in the empirical formula.
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