DP Chemistry (last assessment 2024)

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Question 19M.1.sl.TZ2.1

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.sl.TZ2.1
Level sl Paper 1 Time zone TZ2
Command term Question number 1 Adapted from N/A
1.
[Maximum mark: 1]
19M.1.sl.TZ2.1

How many moles of magnesium hydroxide are produced with 0.50 mol of ammonia?

Mg3N2 (s) + 6H2O (l) → 3Mg(OH)2 (aq) + 2NH3 (aq)

A. 0.25

B. 0.33

C. 0.75

D. 1.5

[1]

Markscheme

C

Examiners report

This was one of the easier questions on the paper. 79 % of the candidates were able to deduce the amount of a product given the amount of another product and the balanced equation.

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