DP Chemistry (last assessment 2024)

Question 22N.2.hl.TZ0.a

Date	November 2022	Marks available	[Maximum mark: 1]	Reference code	22N.2.hl.TZ0.a
Level	hl	Paper	2	Time zone	TZ0
Command term	Calculate	Question number	a	Adapted from	N/A

[Maximum mark: 1]

22N.2.hl.TZ0.a

Ammonium nitrate, NH₄NO₃, is used as a high nitrogen fertilizer.

Calculate the percentage by mass of nitrogen in ammonium nitrate. Use section 6 of the data booklet.

[1]

Markscheme

« $% N = \frac{2 \times 14.01 g m o l^{- 1}}{(2 \times 14.01 g m o l^{- 1} + 4 \times 1.01 g m o l^{- 1} + 3 \times 16.00 g m o l^{- 1})} \times 100 % =$ » $35.00$ « $%$ » ✔

Examiners report

Almost all students managed to calculate that ammonium nitrate contains 35.0% nitrogen.

Syllabus sections

Core

Core » Topic 1: Stoichiometric relationships » 1.2 The mole concept

Core » Topic 1: Stoichiometric relationships

Question 22N.2.hl.TZ0.a

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