The synthesis of maleic acid anhydride (C?H?O?) can be accomplished by reacting benzene (C?H?) and oxygen gas in the following chemical reaction: 2 C?H?(l) + 9 O?(g) ? 2 C?H?O?(s) + 4 CO?(g) + 4 H?O(g) What is the mass in grams of oxygen gas that is required to produce 50.3 grams of maleic acid anhydride