<prompt> At the altitude of 6500 meters, the atmospheric pressure is 347 mmHg. What is the inspired PO2.73 mm Hg63 mm Hg53 mm Hg83 mm Hg  <response>: According to law of paial pressures : Pressure exeed by a gas in a mixture is directly propoional to its concentration in the mixture. In inspired gases; 20 O2 78 N2 PH2O 47 mmHg air humidified with inspiration 347 - 47 300 mmHg gaseous component 