Answer:
3
Explanation:
Chemical equation:
Fe + Cl₂ → FeCl₃
Balanced chemical equation:
2Fe + 3Cl₂ → 2FeCl₃
when iron react with chlorine it form iron chloride. In given reaction oxidation reduction take place.
Iron becomes Fe⁺³ while chlorine Cl⁻¹ that's why three chlorine atoms react with one iron atom to make the compound overall neutral.
Coefficient with reactant and product.
Reactant Product
Fe = 2 FeCl₃ = 2
Cl₂ = 3
