Mass percent of each element in a formula you type.
| Molar mass (g/mol) | – |
| Mass % | – |
Use this calculator when a label or a problem asks what percent of H2SO4 is sulfur.
The calculation divides each element’s total atomic mass in the formula by the formula weight, times 100. The same parser as molar mass is used: H2SO4, Ca(OH)2, and hydrates such as CuSO4·5H2O.
This is elemental mass percent from the formula, not an experimental CHN result.
Formula: Formula such as H2SO4, C6H12O6, or CuSO4·5H2O. Parentheses allowed.
Molar mass (g/mol): Formula weight in g/mol.
Mass %: Each element with its mass percent, for example S 32.69%.
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