When iron reacts with chlorine, 0.12 mol of iron reacts with 0.18 mol of chlorine (Cl₂).
Which is the correct equation for the reaction?

To find the correct equation, we need to determine the molar ratio of the reactants from the experimental data. We are given: - Moles of iron (Fe) = 0.12 mol - Moles of chlorine (Cl₂) = 0.18 mol The ratio of moles is Fe : Cl₂ = 0.12 : 0.18. To simplify this ratio to the smallest whole numbers, we can divide both sides by the greatest common divisor, or simply divide by the smaller number and adjust. Divide both by 0.12: (0.12 / 0.12) : (0.18 / 0.12) 1 : 1.5 Ratios in chemical equations must be whole numbers, so we multiply the entire ratio by 2: (1 × 2) : (1.5 × 2) 2 : 3 This means that 2 moles of iron react with 3 moles of chlorine gas. We now look for the equation with this stoichiometric ratio. - A: Fe + Cl₂ (1:1 ratio) - B: Fe + 3Cl₂ (1:3 ratio) - C: 2Fe + Cl₂ (2:1 ratio) - D: 2Fe + 3Cl₂ (2:3 ratio) The correct equation is D.