How many molecules of hydrogen chloride gas could theoretically be produced at STP by reacting 34.7 liters of hydrogen gas at STP with excess chlorine gas? H2 + Cl2 à HCl (not balanced)

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10-3 m and k for the dissociation is 1.86x10-5. ch3cooh(aq)+h2o(l)+> h3o+(aq)+ch3coo-(aq) show me how to get the answer.