How Many Moles of Hydrogen Peroxide Decompose to Give 1

How many moles of hydrogen peroxide decompose to give 1.00 mol of oxygen? __H₂O₂(l) __H₂O(l) + __O₂(g)

A) 0.500 mol
B) 1.00 mol
C) 2.00 mol
D) 4.00 mol
E) none of the above