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Chem3 Ch5.p2.B

Empirical Formulas

Empirical Formulas: ProcessAnswer
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)
Empirical Formula from mass percent: Step 1 Write the mass percent as a mass (mass percent is just mass per 100 g sample)
Empirical Formula from mass percent: Step 2 Convert each mass to moles
Empirical Formula from mass percent: Step 3 Divide each molar amount by the smallest molar amount
Empirical Formula from mass percent: Step 4 Round the mole ratios to the nearest whole number or simple fraction
Empirical Formula from mass percent: Step 5 These are the subscripts in the empirical formula
Created by: nikkimem32
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