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Question 19M.2.HL.TZ2.cii

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.HL.TZ2.cii
Level HL Paper 2 Time zone TZ2
Command term Calculate Question number cii Adapted from N/A
cii.
[Maximum mark: 2]
19M.2.HL.TZ2.cii

Calculate, in hours, the time at which the activity of the sample has decreased to one-third of the initial activity.

[2]

Markscheme

1 3 = e − λ t ✔

t = 20«hr» ✔

Examiners report

This was very well answered with the majority of candidates scoring full marks. This is a good indication that candidates weren’t short of time in this paper.

Syllabus sections