Physics: Statistical Mechanics | The Ideal Gas and Kinetic Molecular Theory |. Answer the Problems and Show Complete Solution. | Please read comments.

9. At what frequency would the wavelength of sound in air be equal to the mean free path of oxygen molecules at 1.0 atm pressure and 0.00 .C? The molecular diameter is 3.0 x 108 cm. 10. The volume of an ideal gas is adiabatically reduced from 200 L to 74.3 L. The initial pressure and temperature are 1.00 atm and 300 K. The final pressure is 4.00 atm. (a) Is the gas monatomic, diatomic, or polyatomic? (b) What is the final temperature? (c) How many moles are in the gas