Explain an adult takes roughly 12 breaths each minute, inhaling approximately 500 mL with each breath. Oxygen and carbon dioxide are exchanged in the lungs. The amount of nitrogen exhaled equals the amount inhaled, as well as the mole fraction of nitrogen in the exhaled air is 0.75. Explain the exhaled air is saturated with water at the body temperature (37°C). Evaluate the water loss (g/day) when a person is breathing air at 23°C and a relative humidity of 10% in an airplane