How do you solve mol mol conversions? For example: there are 14.5 mol N2 but trying to find the mol of H2 and it need to produce 22.5 mol NH3. The equation is: N2 + 3H2 ---> 2NH3

I don't quite understand what you meant earlier, but let me tell you that if you had 1mol of N2 and 3mol of H2, you'll obtain 2mol of NH3.

Therefore, if you have 14.5 mol of N2 and (14.5*3) mol of H2, you'll obtain (14.5*2) mol of NH3.

Ah, and post back your question more clearly if your problem was not solved.