H2S (aq) can be analyzed by titration with coulometrically generated I2. H2S + I2 --> S(s) + 2H+ + 2I- To 50.00 mL of sample were added 4 g of KI. Electrolysis required 812 s at 52.6 mA. Calculate the concentration of H2S (microgram/mL) in the sample.