How many moles of SO3 are produced when 1.5 mol of O2 react with SO2?

3 mole O2

Explanation:

Need balanced equation first:  O2 + 2SO2 --> 2SO3

assuming SO2 is in excess,

1.5 mol O2 (2moles SO3/1mole O2) = 3 mole O2

answer; /// i do believe that the correct answer is (c)nuclear bond