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CAIE A-Level Chemistry AS Mathematical Structural Convention and Data Skills Questions

Practise the calculation, graph, representation and supplied-data conventions used across CAIE Chemistry.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Covered syllabus points

Mathematical requirementsOrganic structure and mechanism conventionsData section reference

Question 1

[Maximum number: 1]

The model of the nuclear atom was first proposed by Ernest Rutherford. He developed this model on the basis of results obtained from an experiment using gold metal foil.

Tumbaga is an alloy of copper and gold. A sample of tumbaga was analysed. The mass spectrum of the sample is shown.

Figure for Question 1 — CAIE A-Level Chemistry AS

Calculate the percentage abundance of gold, x, in the sample of tumbaga.

x= % [1] \begin{aligned} & x= \\ & \text { \% [1] } \end{aligned}

Question 2

[Maximum number: 3]

4(CH3)3CCHO4\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCHO} is used in the synthesis of some antibiotics.

X, Y and Z are all isomers of (CH3)3CCHO\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCHO}.

A summary of some of the reactions and properties of X, Y and Z is shown in the table.

Table for Question 2 — CAIE A-Level Chemistry AS

Draw the skeletal formula of Z.

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