Equimolar amounts of Cl₂(g) and CO(g) are injected into an evacuated, rigid container, where they react according to the equation below.

Cl₂(g) + CO ⇌ COCl₂(g) ΔH = -109kJ/mol

(a) If 7. 0 g of CO(g) is consumed in the reaction with excess Cl₂(g), how many moles of COCl₂(g) are produced?