Question

Jumlah mol pada 4 gram NaOH ?

Answer 1

Mol=gr/MR
mol=4/14
mol= 0,28 mol

Answer 2

Mr NaOH = 1 . Ar Na + 1. Ar O + 1 . Ar H
= 1 . 23 + 1 . 16 + 1 . 1
= 23 + 16 + 1
= 40

mol NaOH = massa NaOH / Mr NaOH
= 4 / 40
= 0,1 mol