Helping those who are in need of help with various Chemistry related topics...
The empirical formula shows the lowest whole number ratio of the elements in a compound (the simplest formula of a compound).Step 1When you are given the percent composition, you assume that the percentage is grams (g). So 14.9% = 14.9 grams.Step 2Convert the grams to molsExample: 14.9 g of H = 1 mol/1.01 (Atomic mass) = 14.8 mols.Step 3Find the ratio.Example: H14.8 O2.0Divide both sides by the lowest number that is visible. So 2 is the lowest number visible.Example: H14.8 O2.0 -------- -------- --> H7.4 O1 --> H7O (This is your final 2.0 2.0 answer. We rounded 7.4 to 7.)
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