molarity is defined as the number of moles dissolved in 1 L of solution .2 mol of NaOH has been dissolved in a volume of 3 L. we need to then find the number of NaOH moles dissolved in 1 L. Molarity = number of moles / volume in L Molarity = 2 mol / 3 L = 0.67 mol/L Therefore molarity of NaOH - 0.67 M
