Jawabanmu

2014-09-04T22:20:56+07:00
Mr NaNO3 = 23+14+48= 85
n NaNO3 = 10/85 = 2/17
250ml air = 250 gr air
n H2O = 250/18 = 125/9

Fraksi mol NaNO3 = (2/17) / (2/17+125/9) = 0,12 / 14,01 = 0,0085 kira2