At high altitudes, mountain climbers are unable to absorb a sufficient amount of o2 into their bloodstreams to maintain a high activity level. at a pressure of 1 bar, blood is typically 95% saturated with o2, but near 18,000 feet where the pressure is 0.50 bar, the corresponding degree of saturation is 71%. air contains 20.99\(\%\\) o2 by volume. assume that the density of blood is 998 kg m−3. find the mas.