Jawabanmu

2014-04-19T18:35:32+07:00
Gak ada harga Ka atau Kb nya ya ?
Jawaban paling cerdas!
2014-04-19T18:44:06+07:00
Ph = M = 10^-12 
M = (gr/mr) x (1000/ml)
10^-12 = (gr/40) x(1000/10.000)
gr = 400 x 10^-12
   = 4 x 10^-10

1 5 1