Jawabanmu

2014-05-06T19:24:44+07:00
Na2S2O3 = 0
( +1 x 2) + 2S + (-2 x 3) = 0
+2 + 2S -6 =0
+2 + 2S = 6
2S = 6 - 2
2S = 4
S = 4/2
S=2