According to the reaction below, how many moles of each reactant are needed to produce 2.00 moles of N₂O₄?
N₂ + 2O₂ -> N₂O₄
a) 1 mole of N₂, 2 moles of O₂
b) 2 moles of N₂, 4 moles of O₂
c) 2 moles of N₂, 1 mole of O₂
d) 1 mole of N₂, 1 mole of O₂