200 atmospheres - higher pressure favours forward reaction because fewer molecules of gas. Compromise- higher pressure would require more energy/cost more.
450*C - lower temperature = more ammonia because forward reaction is exothermic. Compromise - lower temperature = lower rate of reaction = less ammonia in given time.
Iron catalyst...I think? Provides a 'different pathway' for the reaction and lowers the rate of reaction = more produced in a given time.
^that's off the top of my head without revising it for a while so it's probably wrong.
Biology question: Compare/contrast conditions required for production of biofuels/biogas/fusarium.