Chapter 11, Problem 109E

Gaseous ammonia is injected into the exhaust stream of a coal-burning plant to reduce the pollutant NO to N₂ according to the reaction:
${\text{4NH}}_{\text{3}}\left(\text{g}\right)\text{+4NO}\left(\text{g}\right){\text{+O}}_{\text{2}}\left(\text{g}\right)\to 4{\text{N}}_{\text{2}}\left(\text{g}\right){\text{+6H}}_{\text{2}}\text{O}\left(\text{g}\right)$
Suppose that the reactant stream of a power plant has a flow rate of 335 L/s at a temperature of 955 K and that the exhaust contains a partial pressure of NO of 22.4 torr. What should be the flow rate of ammonia delivered at 755 torr and 298 K into the stream to react completely with the NO if the ammonia is 65.2% pure (by volume)?