Henry's Law, need rxn rate of diff measurements given volume

Consider the following aqueous route to oxidize SO2:
SO2(aq) + H2O2(aq) -> H2SO4(aq) k = 1.1 X 10^3 L/mols
a. The partial pressure and Henry's law constants for SO2 and H2O2 are 2.7 ppm (KH = 1.2 mol L-1atm-1) and 4.9 ppb (KH = 1.0E5 mol L-1atm-1), respectively. Calculate the reaction rate of this process.
b. Calculate the reaction rate (per liter of air) if the amount of liquid water in the atmosphere is 0.008 g L-1.

Hint: Calculate volume of water contaminated, length of time to do this, distance

I downloaded a study guide and attempted it 3 times but was wrong.