DP Chemistry (last assessment 2024)

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Question 22M.1.hl.TZ1.1

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.hl.TZ1.1
Level hl Paper 1 Time zone TZ1
Command term Solve Question number 1 Adapted from N/A
1.
[Maximum mark: 1]
22M.1.hl.TZ1.1

2.67 g of lead (II) carbonate is decomposed by heating until constant mass.

PbCO3 (s) → PbO (s) + CO2 (g)

What is the final mass of solid?

A.  0.44 g

B.  2.23 g

C.  2.67 g

D.  3.11 g

[1]

Markscheme

B

Examiners report

76% of candidates correctly identified final mass of solid in the decomposition reaction with little difficulty in using mental math to arrive at the answer.

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