Question -
Answer -
% of iron by mass = 69.9 % [Given]
% of oxygenby mass = 30.1 % [Given]
Relativemoles of iron in iron oxide:
Relative moles of oxygen in iron oxide:
Simplest molar ratio of iron to oxygen:
= 1.25:1.88
= 1: 1.5
2: 3
∴ The empirical formula of the iron oxide is Fe2O3.