Ammonia Reacts with Fluorine to Produce Dinitrogen Tetrafluoride and Hydrogen

Ammonia reacts with fluorine to produce dinitrogen tetrafluoride and hydrogen fluoride (used in the production of aluminum,in uranium processing,and in the frosting of light bulbs) . 2NH₃(g) + 5F₂(g) → N₂F₄(g) + 6HF(g)
How many moles of NH3 are needed to react completely with 13.6 mol of F₂?

A) 34.0 mol
B) 27.2 mol
C) 6.80 mol
D) 5.44 mol
E) 2.27 mol