The balanced chemical equation you provided is:
\[ 2 \text{Na} + \text{Cl}_2 \rightarrow 2 \text{NaCl} \]
This indicates that 2 molecules of sodium (Na) react with 1 molecule of chlorine gas (Cl₂) to produce 2 molecules of sodium chloride (NaCl).
Therefore, the number of molecules of sodium chloride produced is:
2
So the answer is 2.