Cambridge IGCSE Chemistry practice

Paper 4 structured question: Formulae

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Marks

Topic

Formulae

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Paper 4Theory (Extended)2 marks

Understanding empirical formulas in different compounds.

Description

Consider the compounds: A (C2H4), B (C3H6), and C (C4H8). Identify their empirical formulas.

a
Identify the empirical formula for each compound.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 4Theory (Extended)3 marks

Data Table

A compound contains the following mass percentages: Carbon: 40%, Hydrogen: 6.67%, Oxygen: 53.33%.

a
State the empirical formula of the compound based on the given mass percentages.
Your answer
Aim for approximately 3 distinct marking points.
[3]