Give the Gas That Is the Lowest Percent by Volume

A gas mixture consists of N₂,SO₂,and Ar,where the mole fraction of N₂ is 0.55 and the mole fraction of Ar is 0.25.If the mixture is at STP in a 5.0 L container,how many molecules of SO₂ are present? A) 4.5 × 10²² molecules SO₂ B) 2.7 × 10²² molecules SO₂ C) 3.7 × 10²³ molecules SO₂ D) 1.1 × 10²³ molecules SO₂ E) 9.3 × 10²⁴ molecules SO₂