MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent ConceptMolecular Formula

An oxide of metal (M) has 40% by mass of oxygen. Metal M has atomic mass of 24. The empirical formula of the oxide is

A.M2O

B.M2O₃

C.MO✓ Correct

D.M3O₄

Explanation

Elements % Mole ratio Simplest atomic ratio M 60% 60 2.5 24 2.5 1 2.5 O 40% 40 2.5 16 2.5 1 2.5 ∴The empirical formula is MO The correct option is (c)

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