Class 11 Chemistry simulations · Some Basic Concepts of Chemistry

Empirical formula from percentage composition

Enter the mass percentages of C, H, O and N and convert them to the simplest whole-number ratio.

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What to notice

Glucose (40.0 % C, 6.7 % H, 53.3 % O) gives CH₂O; the molecular formula is a whole-number multiple.

Key relation

moles = mass % / atomic mass ; divide by the smallest ; round to whole numbers

Try this

Try 52.2 % C, 13.0 % H, 34.8 % O. Which compound could it be?

What you can change

• Carbon: 0 to 100 %
• Hydrogen: 0 to 20 %
• Nitrogen: 0 to 60 %

More in Some Basic Concepts of Chemistry

• Molarity and dilution
• Limiting reagent: making water
• Mole concept: mass, moles and particles

See all Class 11 Chemistry simulations or every Physica simulation.