320g of sulfur dioxide react with 32.0g of oxygen and excess water to form sulfuric acid (H2SO4)

Question

a. What is the limiting reagent?
b. What is the theoretical yield of product?
c. How many grams of excess reagent will remain?

Answer 1

2SO2+ O2 + 2H2O >>> 2H2SO4

320 gram SO2=5 moles check that
32 g O2= one mole

So looking at the balanced equation, you have an excess of SO2, or a deficit of O2.