For the reaction SO3 + H2O ® H2SO4, how many grams of sulfur trioxide are required to produce 3.78 mol of sulfuric acid?

Answer 1

SO₃(g) + H₂O(l) ===> H₂SO₄(aq)

3.78 moles H₂SO₄ x 1 mole SO₃/mole H₂SO₄ x 80.1 g/mole SO₃ = 303 g SO₃ required (to 3 sig. figs.)