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CAIE A-Level Chemistry 13.1.6 Molecular & Empirical Formulae

Practise counting atoms in structural, displayed and skeletal formulae and reducing molecular ratios to empirical formulae.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • count implied carbon and attached hydrogen atoms correctly in a skeletal formula
  • read every displayed atom to state the complete molecular formula
  • divide molecular subscripts by their highest common factor to obtain the empirical formula

13.1.6—The molecular and/or empirical formula question 1

[Maximum number: 1]

Organic compounds can be distinguished using chemical tests and analytical techniques.

Table 3.1 shows four pairs of organic compounds.

Table 3.1

Table 3.1

Deduce the molecular formula of D1.

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