A student used the apparatus shown (boiling tube with sulfuric acid, rubber bung, delivery tube into an inverted 250 cm³ measuring cylinder over a water trough) to collect the gas produced from the reaction between copper(II) carbonate and sulfuric acid. The bung was removed and 0.650 g of copper(II) carbonate was added to 25.0 cm³ of 2.00 mol dm⁻³ sulfuric acid (an excess) in the boiling tube. The bung was quickly replaced and 120 cm³ of carbon dioxide gas was collected in the measuring cylinder. The equation for the reaction is:
CuCO₃(s) + H₂SO₄(aq) → CuSO₄(aq) + H₂O(l) + CO₂(g)
Calculate the molar volume of carbon dioxide gas, in dm³ mol⁻¹, from these data. Give your answer to an appropriate number of significant figures.