How Many Moles of Lithium Metal React to Yield 5

Multiple Choice

How many moles of lithium metal react to yield 5.00 mol of hydrogen gas? __Li(s) + __H₂O(l) → __LiOH(aq) + __H₂(g)

A) 2.50 mol
B) 5.00 mol
C) 10.0 mol
D) 20.0 mol
E) none of the above