O-LevelChemistryStoichiometry5070/12 · May/June 2023 · Q101 Mark

The diagram shows the structures of the atoms of two elements, X and Z. X and Z are not the atomic symbols for these elements. The elements combine to form a compound. What is the mass of one mole of this compound?

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A11g

B12g

C23 g

D30 g

✓ Correct answer

D: 30 g

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 10.

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