Jawabanmu

2014-05-09T19:51:32+07:00
Mol=gr/MR
mol=4/14
mol= 0,28 mol
2014-05-09T19:56:59+07:00
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
Jadikan terbaik ya :)
Berapa jumlah molekulnya ?