Diphosphorus pentoxide (P₄O₁₀, 283.889 g/mol, yes the name is weird) reacts violently with water (18.015 g/mol) to produce phosphoric acid (97.995 g/mol) according to the following chemical equation. How many grams of diphosphorus pentoxide would be required to produce 269.2 grams of phosphoric acid, assuming there is excess water and the reaction proceeds with a 100% yield?

P₄O₁₀(g) + 6 H₂O(l) --> 4 H₃PO₄(aq)