Respuesta :

Hey there! :

number of moles = 0.887 moles of NaOH

310 mL in liters = 310 / 1000 => 0.31 L

Therefore:

M = moles of solute / volume in liters solution

Molarity = 0.887 / 0.31

Molarity = 2.86 M

Hope this helps!