Learning objective

Define the empirical formula of a compound as the simplest ratio of different atoms or ions present in it.

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Cambridge IGCSE ChemistrySubject contentSupplement content

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Quick explanation

This point belongs to Formulae, especially Formulae outcomes.
You need to be able to define the empirical formula of a compound as the simplest ratio of different atoms or ions present in it.
The key ideas to know are Define.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Define

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This objective helps connect Formulae outcomes to exam-style questions, flashcards, and revision notes for Formulae.

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Practice Questions7 linked questions

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Paper 4Theory (Extended)3 marks

Data Table

A compound contains the following mass percentages: Carbon: 40%, Hydrogen: 6.67%, Oxygen: 53.33%.

a
State the empirical formula of the compound based on the given mass percentages.
Your answer
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[3]

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