Larutan NaOH 80% (Mr = 40 g/ mol) memiliki fraksi mol pelaruy sebesar...

NaOH (aq) 80% artinya dalam 100 gr larutan NaOH memiliki Air sebanyak 20 gr dan NaOH sebanyak 80 gr.
●mol (n)
~n NaOH = 80/40 = 2 mol
~n Air = 20/18 = 10/9
●Fraksi mol
Xp = np/(np+nt)
Xp= 10/9 / (10/9 + 18/9 )
Xp= 10/9 * 9/28
Xp = 10/28 = 5/14 = 0,357