DP Chemistry (last assessment 2024)
Question 19M.1.hl.TZ2.38
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.hl.TZ2.38 |
| Level | hl | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 38 | Adapted from | N/A |
38.
[Maximum mark: 1]
19M.1.hl.TZ2.38
The following data were recorded for determining the density of three samples of silicon, Si.
Which average density value, in g cm−3, has been calculated to the correct number of significant figures?
A. 2
B. 2.3
C. 2.27
D. 2.273
[1]
Markscheme
B
Examiners report
Candidates found this question relatively challenging and only 67 % chose the answer with two significant figures. The most commonly chosen distractor was C which expressed the answer to three significant figures.