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O-LevelChemistryStoichiometry5070/11 · May/June 2017 · Q111 Mark

A compound contains 70% by mass of iron and 30% by mass of oxygen. What is its empirical formula? [Ar: O, 16; Fe, 56]

AFeO

BFe2O3

CFe3O2

DFe3O4

✓ Correct answer

B: Fe2O3

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About this question

Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2017 Paper 1 Variant 1, question 11.

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