Answer:
10 mol, or 1.667L
Explanation:
__mol=400gNaOH * [tex]\frac{1mol}{39.99g}[/tex]
__L=400gNaOH * [tex]\frac{1mol}{39.99g}[/tex] * [tex]\frac{1L}{6M}[/tex]
Which one are you solving for? The top is for number of moles and the bottom is number of liters. You already have the mass so you are obviously not solving for that.