Berapa mol NaOH yang terdaoat dalam 200mL larutan NaOH 0,4M? (dik : Ar H = 1 ; O = 16 ; Na = 23 g/mol)

V = 200 mL
M = 0,4 molar
Mr = 40
n = .................?

M = n x 1000/V
0,4 = n x 1000/200
0,4 = n x 5
n = 0,4/5
n = 0,08 mol