Jawabanmu

2014-05-26T18:25:33+07:00
N=g/Mr
g= nxMr
Jp = nx6,02x 10 pgkt 23
3,02x 10 pgkt 23/ 6,02x 10 pgkt 23 = n
1/2 =n
g = 1/2 x 18 
  = 9 
semoga membantu :)