Question

2 Na + Cl2 → 2 NaCl

Answer 1

Approximately 71.77 grams. I think so

Answer 2

Grams of Cl₂ needed : 71.781 g

Further explanation

Reaction

2 Na + Cl₂ → 2 NaCl

mass of Na = 46.5 g

mol of Na(Ar=23 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{46.5}{23}=2.021$

From equation, mol ratio of Na : Cl₂ = 2 : 1, so mol Cl₂ :

$\tt \dfrac{1}{2}\times 2.021=1.011$

Mass of Cl₂(MW=71 g/mol) :

$\tt mass=mol\times MW\\\\mass=1.011\times 71\\\\mass=71.781~g$