hitung berapa mol NaOHyang terdapat dalam 20 gram NaOH jika diketaui (Ar.Na+23,ar. O=16,ar. H=1)

massa NaOH = 20 gram
Mr NaOH
= Ar Na + Ar O + Ar H
= 23 + 16 + 1
= 40


n NaOH
= massa / Mr
= 20/40
= 1/2
= 0,5 mol