Calculate the number of kJ required for the reaction shown below, if you begin with 48 grams of oxygen (O₂) and the ΔHrxn = 180 kJ.
N₂(g) + 2 O₂(g) → 2 NO₂(g)
a) 90 kJ
b) 180 kJ
c) 270 kJ
d) 360 kJ