DP Chemistry (last assessment 2024)
Question 17N.1.sl.TZ0.3
| Date | November 2017 | Marks available | [Maximum mark: 1] | Reference code | 17N.1.sl.TZ0.3 |
| Level | sl | Paper | 1 | Time zone | TZ0 |
| Command term | Question number | 3 | Adapted from | N/A |
3.
[Maximum mark: 1]
17N.1.sl.TZ0.3
How many grams of sodium azide, NaN3, are needed to produce 68.1 dm3 of N2 (g) at STP?
Molar volume at STP = 22.7 dm3 mol–1; Mr(NaN3) = 65.0
2NaN3 (s) → 3N2 (g) + 2Na (s)
A. 32.5
B. 65.0
C. 130.0
D. 195.0
[1]
Markscheme
C