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Learning objective

Apply the equation mass (g) = amount of substance (mol) × molar mass (g/mol) to determine: (a) amount of substance, (b) mass, (c) molar mass, (d) relative atomic or molecular/formula mass, and (e) number of particles, using the Avogadro constant.

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE ChemistrySubject contentSupplement content

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Quick explanation

Apply the equation mass (g) = amount of substance (mol) × molar mass (g/mol) to determine: (a) amount of substance, (b) mass, (c) molar mass, (d) relative atomic or molecular/formula mass, and (e) number of particles, using the Avogadro constant

  • This point belongs to The mole and the Avogadro constant, especially The mole and the Avogadro constant outcomes.
  • You need to be able to apply the equation mass (g) = amount of substance (mol) × molar mass (g/mol) to determine: (a) amount of substance, (b) mass, (c) molar mass, (d) relative atomic or molecular/formula mass, and (e) number of particles, using the Avogadro constant.
  • The key ideas to know are Calculate.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Calculate

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This objective helps connect The mole and the Avogadro constant outcomes to exam-style questions, flashcards, and revision notes for The mole and the Avogadro constant.

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Paper 4 structured question: The mole and the Avogadro constant

Paper 4Theory (Extended)2 marks

Description

Mass and Molar Mass Calculation

A sample of magnesium has a mass of 24 g. The molar mass of magnesium is 24 g/mol. Calculate the amount of substance in moles.

  1. a

    Calculate the amount of substance in moles.

    Aim for approximately 2 distinct marking points.

    [2]
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