Edexcel IGCSE Chemistry · Spec 1.27-1.30
The Mole, Reacting Masses & % Yield
The mole, reacting-mass calculations and percentage yield.
Chemistry revision video
The Mole, Reacting Masses & % Yield
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Spec 1.27-1.30
What you need to know
- Use the relationship moles equals mass divided by M r
- Work out reacting masses from a balanced equation
- Calculate a percentage yield
Active recall
Quick check
Answer each question before opening the answer.
How do you calculate the number of moles from a mass?
Moles = mass ÷ relative formula mass (Mr).
How is percentage yield calculated?
Percentage yield = (actual yield ÷ theoretical yield) × 100.
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