posted by Joe .
2 SO2 (g)+O2 (g)→2 SO3↑
How many grams of SO3(g) are formed if 8.45 grams of oxygen are used?
mols O2 = grams/molar mass.
Using the coefficients in the balanced equation, convert mols O2 to mols SO3.
Now convert mols SO3 t grams. g = mols x molar mass.