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Empirical formulae, molecular formulae and percentage composition · GCSE Chemistry · Courselo

Courselo

GCSE Chemistry
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Quantitative chemistry

Empirical formulae, molecular formulae and percentage composition

Quantitative chemistry · Lesson 3 of 6

Lesson 3 of 6

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Unit 3

Quantitative chemistry

6 lessons · 10 h 15 min of study

Relative formula mass and the mole1 h 45 min of study
Balancing equations and stoichiometry1 h 45 min of study
Empirical formulae, molecular formulae and percentage compositionReading · 0%
Reacting masses, limiting reactants, yield and atom economy2 h of study
Concentration, titration and solution calculations2 h of study
Gas volumes and gas stoichiometry1 h 15 min of study

This unit is ≈17% of the GCSE Chemistry, across 6 lessons. Full syllabus

Lesson 3 of 6 · Quantitative chemistry

Empirical formulae, molecular formulae and percentage composition

3 quick checks≈2% of the testCore: Core: tested on most papers

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By the end you’ll be able to

calculate the percentage by mass of an element in a compound from its chemical formula
calculate the percentage composition of a compound from experimental or compositional data
determine the empirical formula of a compound from masses or percentage compositions of its elements

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Adaptive questions on empirical formulae, molecular formulae and percentage composition.

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determine the molecular formula from the empirical formula and the relative formula mass

explain the difference between an empirical formula and a molecular formula

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PreviousBalancing equations and stoichiometry Next lessonReacting masses, limiting reactants, yield and atom economy