For the reactions system 2H2(g) + S2(g) = 2H2S(g), a 1.00-liter vessel is found to contain 0.50 mole of H2, 0.020 mole of S2, and 68.5 moles of H2S. Calculate the numerical value of the K eq of this system.

The following questions a24 - a26 relate to 100 ml of 0.0150 m solution of benzoic acid (c6h3cooh). ka(c6h3cooh) = 6.4 x 10^-5. what is the ph of the solution after the addition of 1 x 10^-3 moles of naoh? you may assume no volume change to the solution upon addition of the naoh.