Calculate the Mass of Excess Reagent Remaining at the End $\rarr$

Multiple Choice

Calculate the mass of excess reagent remaining at the end of the reaction in which 90.0 g of SO₂ are mixed with 100.0 g of O₂.2SO₂ + O₂ $\rarr$ 2SO₃

A) 11.5 g
B) 22.5 g
C) 67.5 g
D) 77.5 g
E) 400 g