Jawabanmu

2014-06-12T09:44:11+07:00
N = n
M/Mr = N/ Na
M/ 18 = 3,01 .10²³ / 6,02 . 10²³
M = 18 . (1/2)
M = 9 gr
2014-06-12T09:53:14+07:00
N= N:Na
n=3,01 10 pangkat 23 : 6,022 10 pangkat 23
n= 0,5

massa= n.Mr
massa= 0.5 . 18
massa= 9 gr