The industrial production of nitric acid (HNO3) is a multistep process. The first step is the oxidation of ammonia (NH3) over a catalyst with excess oxygen (O2) to produce nitrogen monoxide (NO) gas as shown by the unbalanced equation given here:

?NH3(g)+?O2(g)?NO(g)+?H2O(g)

What volume of O2 at 684 mmHg and 31 CC is required to synthesize 10.0 molmol of NO?

Express your answer to three significant figures and include the appropriate units.