Titanium and iron are examples of transition metals. 2.24 g of iron combines with 0.96 g of oxygen to form an oxide of iron.Determine the formula of this oxide of iron and use it to complete the balanced equation. You must show your working – 9004

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1. Mass of iron = 2.24 g, Ar of Fe = 56
   Moles of Fe = 2.24 ÷ 56 = 0.04 mol
   Mass of oxygen = 0.96 g, Ar of O = 16
   Moles of O = 0.96 ÷ 16 = 0.06 mol
   Simplest whole number ratio:
   0.04 : 0.06 → divide both by 0.02
   = 2 : 3
   The formula of the compound is Fe₂O₃
   Balanced equation:
   4Fe + 3O₂ → 2Fe₂O₃

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