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Cambridge IGCSE Chemistry practice

Paper 4 structured question: The mole and the Avogadro constant

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The mole and the Avogadro constant

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Paper 4Theory (Extended)2 marks

Calculating mass and amount of substance

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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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Paper 4 structured question: The mole and the Avogadro constant

Paper 4Theory (Extended)2 marks

Description

Mass Calculation from Moles

A chemist has 0.5 moles of sodium sulfate (Na2SO4). The molar mass of sodium sulfate is 142 g/mol. Calculate the mass of sodium sulfate in grams.

  1. a

    Calculate the mass of sodium sulfate in grams.

    Aim for approximately 2 distinct marking points.

    [2]