You have molarity and you have volume. Use the formula : Molarity(M)= Moles(N)/Liter(L) to get the solution. 150 ml= .150 L 7.7 = N/.150 N=.1.155 moles of NaOH. And since you know the moles, use the molar mass to figure out the grams. (40g/mol NaOH) x (1.155mol) = 46.2 g of NaOH.
