Iron is obtained from iron(III) oxide. In the following series of reactions, (step 1) hot air (O₂) reacts with coke (C) to produce CO₂ and heat up the blast furnace, (step 2) additional coke reduces CO₂ into CO, and (step 3) the very high temperature allows for CO to reduce Fe in Fe₂O₃.
(Step 1) C (s) + O₂ (g) → CO₂ (g)
(Step 2) CO₂ (g) + C (s) → 2 CO (g)
(Step 3) Fe₂O₃ (s) + 3 CO (g) → 2 Fe (l) + 3 CO₂ (g)
Write mole ratios to show the relationship between reaction components.

• A. Mole ratio of the iron species:
  Fe₂O₃: Fe = 1: 2
  Mole ratios of each iron species with other reaction components:
  Fe₂O₃: C: O₂: CO: CO₂ = 1: 2: 1: 1: 3
  Fe: C: O₂: CO: CO₂ = 1: 2: 1: 1: 3
• B. Mole ratio of the iron species:
  Fe₂O₃: Fe = 1: 2
  Mole ratios of each iron species with other reaction components:
  Fe₂O₃: C: O₂: CO: CO₂ = 1: 2: 1: 1: 3
  Fe: C: O₂: CO: CO₂ = 2: 2: 1: 1: 3
• C. Mole ratio of the iron species:
  Fe₂O₃: Fe = 2: 1
  Mole ratios of each iron species with other reaction components:
  Fe₂O₃: C: O₂: CO: CO₂ = 1: 2: 1: 1: 3
  Fe: C: O₂: CO: CO₂ = 2: 2: 1: 1: 3
• D. Mole ratio of the iron species:
  Fe₂O₃: Fe = 1: 2
  Mole ratios of each iron species with other reaction components:
  Fe₂O₃: C: O₂: CO: CO₂ = 2: 2: 1: 1: 3
  Fe: C: O₂: CO: CO₂ = 1: 2: 1: 1: 3