Let's say Julius Casar urinated in the Mediterranean Sea 2,000 years ago. Assuming that the oceans and the rest of the hydrosphere have been completely mixed over the last 2000 years, approximately how many water molecules from that historic urination would you expect to find in a pint of beer today? Assumptions: Volume of one urination = 1 L Total volume of the oceans and hydrosphere is 1.4 x 10^9 km^3 Avogadro's # 6.02 x 10^23 molecules/mole Molecular weight of water = 18 g/mol Assume that the beer has the same density as water.