📊 Percent Composition Calculator

Formula:

% Element = (Element Mass × Count) / Total Molecular Mass × 100%

Steps:

1. Find the atomic mass of each element
2. Count how many atoms of each element are in the formula
3. Calculate the mass contribution of each element
4. Find the total molecular mass
5. Divide each element's mass by total mass and multiply by 100%

Important Notes:

Conservation: All percentages must add up to 100%

Accuracy: Use precise atomic masses for better results

Parentheses: Handle grouped atoms correctly (e.g., Ca(OH)2)