DP Chemistry (last assessment 2024)

Question 20N.1.sl.TZ0.2

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.1.sl.TZ0.2
Level	sl	Paper	1	Time zone	TZ0
Command term	Apply	Question number	2	Adapted from	N/A

[Maximum mark: 1]

20N.1.sl.TZ0.2

What is the number of carbon atoms in $12 g$ of ethanoic acid ${CH}_{3} COOH$ , $M_{r} = 60$ ?

A. $0.20$

B. $2.0$

C. $1.2 \times 10^{23}$

D. $2.4 \times 10^{23}$

[1]

Markscheme

Examiners report

Approximately 57% of candidates could correctly apply Avogadro's number in calculating number of carbon atoms in 12 g of ethanoic acid. Many candidates did not identify that there were 2 carbon atoms per molecule.

Syllabus sections

Core

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

Core » Topic 1: Stoichiometric relationships

Question 20N.1.sl.TZ0.2

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