the balanced chemical equation in this scenario is
2SO2(g) + O2(g) → 2SO3(g), which establishes the molar ratio of 1 mol O2: 2 mole SO2
from there then you can use the molar ratio as the conversion factor
0.0958 mol O2 x 2 mol SO2 / 1 mol O2 = 0.1916 mol SO2
meaning that 0.1916 moles of SO2 will react with the O2 in this scenario