(Solved): 2.5 Sulfate \( \left(\mathrm{SO}_{4}^{2-}\right) \) concentration is reported to be \( 10 \mathrm{ ...

2.5 Sulfate \( \left(\mathrm{SO}_{4}^{2-}\right) \) concentration is reported to be \( 10 \mathrm{mg} \mathrm{S} / \mathrm{L} \), hydrogen sulfide \( \left(\mathrm{H}_{2} \mathrm{Saq}\right) \) is \( 1 \mathrm{mg} \mathrm{S} / \mathrm{L} \), and monohydrogen sulfide \( \left(\mathrm{HS}^{-}\right) \)is \( 2 \mathrm{mg} \mathrm{HS}^{-} / \mathrm{L} \). The concentration of \( \mathrm{H}_{2} \mathrm{~S} \) measured in air as \( 100 \mathrm{ppb}_{\mathrm{v}} \). (a) What is the total aqueous inorganic sulfur in units of \( \mathrm{ppm} \mathrm{S} \) ? (b) What is the air concentration of \( \mathrm{H}_{2} \mathrm{~S} \) concentration in units of \( \mu \mathrm{g} / \mathrm{m}^{3} \) ? (Assume air temperature is \( 25^{\circ} \mathrm{C} \), pressure is \( 1 \mathrm{~atm} . \) )