⚗️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.
- 1Calculate the molar mass of the compound
- 2For each element: element mass in formula = atomic mass × subscript
- 3Percent composition = (element mass / total molar mass) × 100%
H₂O: H=2×1.008=2.016, O=15.999, total=18.015=H: 11.2%, O: 88.8%2.016/18.015×100=11.19%
⭐
Fun Fact
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.
References
🔒
100% Gratuito
Nessuna registrazione
✓
Preciso
Formule verificate
⚡
Istantaneo
Risultati immediati
📱
Compatibile mobile
Tutti i dispositivi