Question

2H2O(l)  O2(g)  2SO2(g) → 2H2SO4(aq)
If 50.0 g of sulfur dioxide from pollutants reacts with
water and oxygen found in the air, how many grams of
sulfuric acid can be produced? How many grams of
oxygen are used in the process?

Answer 1

mols SO2 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols SO2 to mols H2SO4.
Now convert mols H2SO4 to grams. g = mols x molar mass = ?

You find the g O2 by the same process. Using the coefficients, convert mols SO2 to mols O2 then convert that to grams O2.
Post your work if you get stuck.