已知c(Na2S2O3)=0.1000mol/L,那么为（）mg/mL。M(I2)=253.8g/mol

已知c(Na2S2O3)=0.1000mol/L,那么为（）mg/mL。M(I2)=253.8g/mol
A.25.38
B.6.345
C.12.69(正确答案)
D.50.76