Question

Given a 240.0 g sample of sulfur trioxide (MM= 80.1 g/mol), how many grams of oxygen (MM= 32.0 g/mol) are produced, assuming the decomposition goes to completion?

Answer 1

2 mol of SO₃ produces 1 mol O₂

3 mol SO₃ produces 3/2 mol of O₂

so O₂ produced = 1.5(32) =48 gm