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Hydrogen sulfide (H₂S) reacts with oxygen (O₂) to form sulfur dioxide (SO₂) and water vapour (H₂O): 2H₂S(g) + 3O₂(g) → 2SO₂(g) + 2H₂O(g) If 40 cm³ of hydrogen sulfide reacts completely with 100 cm³ of oxygen, both measured at 200 °C and 1 atm: (a) Identify the limiting reactant. (b) Calculate the total volume of gaseous products formed at the same conditions. [4 marks].
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