Respuesta :

lacybyrd
 1 mol N2 = 2 mol NH3 

325g / 16g/mol = 20.3 mol which ammonia only requires 10.15 mol N2 to produce 

10.15 mol x 28.014g/mol 
= 284 g 
it makes sense that the mass required should be smaller than the mass of the larger product molecules