Percentage Composition Calculator

Calculate Chemical Composition with Precision

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Mass Percentage Calculator

Calculate the mass percentage of each element in a compound.

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Composition from Mass Calculator

Calculate percentages from actual masses of components.

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Understanding Percentage Composition

What is Percentage Composition?

Percentage composition is the relative amount of each element present in a compound, expressed as a percentage by mass. The formula is:

% Element = (mass of element / total mass of compound) × 100%

Applications

Percentage composition is crucial in:

  • Quality control in manufacturing
  • Drug formulation analysis
  • Environmental sample analysis
  • Material purity assessment

Relationship to Molecular Formula

Percentage composition can help determine:

  • Empirical formula
  • Molecular formula
  • Chemical identity
  • Sample purity

Practical Considerations

When working with percentage composition:

  • All percentages must sum to 100%
  • Results are independent of sample size
  • Useful for comparing different samples
  • Important in stoichiometric calculations