Answer:
8 moles SO₂
Explanation:
To find the moles SO₂, you need to multiply the given value by the mole-to-mole ratio. This ratio, between O₂ and SO₂, is made up of the coefficients from the balanced equation.
2 H₂S + 3 O₂ -----> 2 SO₂ + 2 H₂O
12 moles O₂ 2 moles SO₂
-------------------- x ---------------------- = 8 moles SO₂
3 moles O₂