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Empirical/molecular formula

Chemistry · Core calc

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About this practice set

Empirical/molecular formula is part of Chemistry (Core calc). Questions are generated with new numbers each time you practise. Levels available: Easy. After you answer, an explanation is shown.

Example questions

A taste of what you will practise. Answers are revealed after you try.

  • Easy

    A compound contains 5.9% H and 94.1% O by mass. What is its empirical formula?

    • HO
    • H2O
    • HO2
    • H2O2