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Molecular formula: GCSE Chemistry Definition

Alexandra Brennan

Written by: Alexandra Brennan

Reviewed by: Philippa Platt

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Contents

  1. 1. What is molecular formula?
  2. 2. Molecular Formula Revision Resources to Ace Your Exams

What is molecular formula?

In GCSE chemistry, the molecular formula of a compound represents the exact number of atoms of each element present in a molecule.

Unlike the empirical formula, which shows the simplest whole-number ratio of atoms, the molecular formula provides the actual composition. For example, the molecular formula of glucose is C₆H₁₂O₆, while its empirical formula is CH₂O. It is determined using the relative molecular mass and the empirical formula. Understanding molecular formulas is essential in GCSE Chemistry for identifying substances and balancing chemical equations accurately.

Molecular Formula Revision Resources to Ace Your Exams

For more information about molecular formula check out the following resources:

Explore our GCSE Chemistry Revision Resources.

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Author
Reviewer
Alexandra Brennan

Author: Alexandra Brennan

Expertise: Chemistry

Alex studied Biochemistry at Newcastle University before embarking upon a career in teaching. With nearly 10 years of teaching experience, Alex has had several roles including Chemistry/Science Teacher, Head of Science and Examiner for AQA and Edexcel. Alex’s passion for creating engaging content that enables students to succeed in exams drove her to pursue a career outside of the classroom at SME.

Philippa Platt

Author: Philippa Platt

Expertise: Chemistry

Philippa has worked as a GCSE and A level chemistry teacher and tutor for over thirteen years. She studied chemistry and sport science at Loughborough University graduating in 2007 having also completed her PGCE in science. Throughout her time as a teacher she was incharge of a boarding house for five years and coached many teams in a variety of sports. When not producing resources with the chemistry team, Philippa enjoys being active outside with her young family and is a very keen gardener

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