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Consider air as being composed of a mixture of ideal gases.

a. How many moles of air are present in 1 m3 at sea level and T = 298 K?

b. At z = 10 km in the atmosphere far from any land mass, T = 223 K. If there are 11.8 moles of air in 1 m3 at this height, what is the pressure p in N/m2?

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