DP Chemistry (last assessment 2024)

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Question 22N.1.sl.TZ0.6

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1.sl.TZ0.6
Level sl Paper 1 Time zone TZ0
Command term Solve Question number 6 Adapted from N/A
6.
[Maximum mark: 1]
22N.1.sl.TZ0.6

What is the relative atomic mass of a sample of chlorine containing 70 % of the 35Cl isotope and 30 % of the 37Cl isotope?

A.  35.4

B.  35.5

C.  35.6

D.  35.7

[1]

Markscheme

C

Examiners report

73% of the candidates were able to calculate the relative atomic mass of the sample of chlorine correctly (which was 35.6) given the masses and percentage abundances of the isotopes without the use of a calculator.

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