A certain soft drink is bottled so that a bottle at 25°C contains CO2 gas at a pressure of 5.0 atm over the liquid. Assuming that the partial pressure of CO2 in the atmosphere is 4.0 x 10^-4 atm, calculate the equilibrium concentrations of CO2 in the soda both before and after the bottle is opened. The Henry's law constant for CO2 in aqueous solution is 3.1 x 10^-2 mol/L atm at 25°C.