er a) Deep-sea divers often substitute helium for nitrogen because helium has a much _ity in biological fluids compared to nitrogen. b1) When divers at 100 ft deep experience a pressure of 4 atm, the air they breathe can be 95% He and just 5% O2. Briefly explain how such a low percent of oxygen can still sustain them. a b2) Further, if the oxygen concentration gets much higher, the urge to breathe will be reduced and not enough CO2 will be removed by respiration! Suppose that, is scuba-diving and breathing air that contains 4.0% CO2- this, by the way, can result in nausea and a throbbing headache! What is the molarity of CO2 in air that contains 4.0% CO2, assuming 4.0 atm and Joseph's body temperature of 38C? c) A water sample is collected near an Estuary (where the fresh water and ocean water mix). A 10.0-ml sample of this water yields 0.53 grams of AgCl. What was the molar concentration of Chions in the original water sample