Last updated on Sep 21, 2026

Empirical formula example (Edexcel GCSE Chemistry): Flashcards

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Empirical formula example

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Mass of $Mg$ in example

1.92 g

Mass of $Cl$ in example

5.68 g

Ar of $Mg$

24

Ar of $Cl$

35.5

Moles of $Mg$ (mass 1.92g, Ar 24)

0.08 moles

Moles of $Cl$ (mass 5.68g, Ar 35.5)

0.16 moles

How to simplify mole ratio

Divide each by smallest number of moles

Simplified ratio for $Mg$ ( $0.08 div 0.08$ )

1

Simplified ratio for $Cl$ ( $0.16 div 0.08$ )

2

Empirical formula for $Mg$ : $Cl$ ratio 1:2

$MgCl_2$

Explore Edexcel GCSE Chemistry Revision Notes by Topics

The mole

Relative atomic mass

Relative formula Mass

Percentage composition example

Empirical formula example

Molecular formula example

Explore Edexcel GCSE Chemistry Model Answers by Topics

The mole

Relative atomic mass

Relative formula Mass

Percentage composition example

Empirical formula example

Molecular formula example

Explore Edexcel GCSE Chemistry Quizzes by Topics

The mole

Relative atomic mass

Relative formula Mass

Percentage composition example

Empirical formula example

Molecular formula example

Explore Edexcel GCSE Chemistry Exam Questions by Topics

The mole

Relative atomic mass

Relative formula Mass

Percentage composition example

Empirical formula example

Molecular formula example

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