| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.SL.TZ1.9 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 9 | Adapted from | N/A |
Question
What is the definition of the mole?
A. The amount of substance that has the same mass as 6.02 \( \times \) 1023 atoms of carbon-12.
B. The amount of substance that contains as many nuclei as the number of nuclei in 12 g of carbon-12.
C. The amount of substance that has the same mass as one atom of carbon-12.
D. The amount of substance that contains as many elementary entities as the number of atoms in 12 g of carbon-12.
Markscheme
D
Examiners report
[N/A]
