Question #31146

$0.39$ M
Recall that molarity is defined as the mol of solute per liter of solution. In our case, the solute is $N a C l$.
I'm going to assume that for our case, the density of water is $1.0 \cdot g \cdot m {l}^{-} 1$ or $0.001 \cdot g \cdot {l}^{-} 1$.