Empirical Formulas
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Empirical Formula | Simpllest formulas show which elements are present in a compound, with their mole ratios indicated as subscripts. Subscripts are mole-to-mole ratios(P2O5 = 2 mole P: 5 mole O)
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| Empirical Formula from mass percent: Step 1 | Write the mass percent as a mass (mass percent is just mass per 100 g sample)
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| Empirical Formula from mass percent: Step 2 | Convert each mass to moles
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| Empirical Formula from mass percent: Step 3 | Divide each molar amount by the smallest molar amount
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| Empirical Formula from mass percent: Step 4 | Round the mole ratios to the nearest whole number or simple fraction
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| Empirical Formula from mass percent: Step 5 | These are the subscripts in the empirical formula
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nikkimem32
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