O-LevelChemistryStoichiometry5070/11 · May/June 2020 · Q131 Mark

A chicken egg has a mass of 60 g. The egg shell is 10% of the total mass. The egg shell is made of calcium carbonate. What is the mass of calcium in the egg shell?

A0.24 g

B0.40 g

C2.4 g

D4.0 g

✓ Correct answer

C: 2.4 g

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2020 Paper 1 Variant 1, question 13.

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