⚗️Percent Composition Calculator
e.g. H2O, NaCl, C6H12O6
Percent composition by mass expresses the percentage of each element in a compound relative to the compound's total molar mass. It is used to confirm compound identity and to calculate empirical formulas.
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Did You Know?
Iron ore (Fe₂O₃) contains 69.9% iron by mass. A 1-tonne charge of ore yields only 699 kg of iron before further refining — economic knowledge of stoichiometry has massive industrial significance.
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