Lithium and Nitrogen React to Produce Lithium Nitride

Multiple Choice

Lithium and nitrogen react to produce lithium nitride:
6 Li(s) + N₂(g) → 2Li₃N(s)
How many moles of N₂ Are needed to react with 0.500 mol of lithium?

A) 3.00 mol
B) 0.500 mol
C) 0.167 mol
D) 1.50 mol
E) 0.0833 mol