In 1909 Fritz Haber discovered the workable conditions under which nitrogen, N2(g), and hydrogen, H2(g), would combine using to produce ammonia. The conditions included medium temperature (~500oC), very high pressure (~351kPa), and an iron catalyst. The reaction is represented by the equation:
N2(g) + 3H2(g) → 2NH3(g)
How many grams of nitrogen are needed to produce 100 grams of ammonia gas?

A) 28.0g N2
B) 50.0g N2
C) 56.0g 2
D) 82.4g N2