23.1 In an effort to make cheap NO gas, ammonia gas is reacted with 20 % excess O2 (20 % excess in the feed to the reactor) 4NH3 + 502 → 4NO + 6H2O 70 % of the NH3 which enters the reactor is...

Good day, I am struggling to answer this question. I am not sure how to get the recycle stream, please help me.

Extracted text: 23.1 In an effort to make cheap NO gas, ammonia gas is reacted with 20 % excess O2 (20 % excess in the feed to the reactor) 4NH3 + 502 → 4NO + 6H2O 70 % of the NH3 which enters the reactor is converted to NO, the rest is unchanged. The reactor products are separated as shown and the NH3 is recycled. How many kilomole NO is produced per hour if the fresh NH3 feed is 100 kmol per hour? (a) How many kilomole NH3 is recycled per hour? (b) How many kilomole O2 is fed to the reactor per hour? 41 |Page O2 NO Separator Reactor NH3 O2 H2O NH3 Recycle