Some CO₂ gas was kept in a sealed container at a pressure of 1 atm and at 273 K. This entire amount of CO₂ gas was later passed through an aqueous solution of Ca(OH)₂. The excess unreacted Ca(OH)₂ was later neutralized with 0.1 M of 40 mL HCl. If the volume of the sealed container of CO₂ was x, then x is _____ cm³ (nearest integer).            
[Given : The entire amount of CO₂(g) reacted with exactly half the initial amount of Ca(OH)₂ present in the aqueous solution.]