Answer to Question #243258 in General Chemistry for nora

Question

Sulfur trioxide, SO₃, is made from the oxidation of SO₂, and the reaction is represented by the equation:

2SO₂ + O₂  ®  2SO₃

A 21-g sample of SO₂ gives 18 g of SO₃. The percent yield of SO₃ is        .

Select one:

Answer 1

Moles of $SO_2=\frac{21}{64.066 }=0.328moles$

Moles of $SO_3=\frac{18}{ 80.06}=0.225 moles$