You are checking the weather forecast for a summertime trip. The air at your destination is...

 

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You are checking the weather forecast for a summertime trip. The air at your destination is expected to be humid, and you are also expecting it to be pretty hot. They are reporting the temperature, and pressure, and you have surmised the composition of the airmass based on the standard atmosphere and the percent relative humidity. The surface pressure is quite reasonable at 1045 mb, low wind, with a surface temperature of about 80 degrees Fahrenheit at present. Let's assume the "air" is a mixture of 77.8% nitrogen, 20.9% oxygen, 0.4% water vapor, and about 0.9% argon. (a) What is the partial pressure of oxygen at your destination now? Express this in Pa. (b) What is the average molar concentration of argon? Express this in mol/m^3. You are checking the weather forecast for a summertime trip. The air at your destination is expected to be humid, and you are also expecting it to be pretty hot. They are reporting the temperature, and pressure, and you have surmised the composition of the airmass based on the standard atmosphere and the percent relative humidity. The surface pressure is quite reasonable at 1045 mb, low wind, with a surface temperature of about 80 degrees Fahrenheit at present. Let's assume the "air" is a mixture of 77.8% nitrogen, 20.9% oxygen, 0.4% water vapor, and about 0.9% argon. (a) What is the partial pressure of oxygen at your destination now? Express this in Pa. (b) What is the average molar concentration of argon? Express this in mol/m^3.