NH₃ (aq)+CO₂(aq)+H₂O(l) → NH₄⁺​ (aq)+HCO₃⁻(aq) .

The chemist added saturated NaCl(aq) to the solution prepared in Step4, and NaHCO₃ (s) precipitated. The chemist filtered the solution, set aside the filtrate, and dried the precipitate in a vacuum chamber at room temperature (20°C).

The chemist heated enough NaHCO3 (s) from Step 5 to produce 1 molNa 2CO₃​(s),1 mol H₂O vapor, and 1 mol of a gas (Gas X). The chemist collected Gas X for further study.

If all of Gas X is held in a sealed chamber at STP, what will be its approximate volume?
A. 22.4 L
B. 44.8 L
C. 67.2 L
D. 89.6 L