Titan, a moon of Saturn, is believed by astronomers to have an atmosphere that is about 95% nitrogen. At Titan's surface the acceleration due to gravity is 1.35 m/s2, the atmospheric pressure is 210 kPa, and the temperature is 94 K. Calculate the density of the "air" at the surface. Assuming an isothermal atmosphere, calculate the scale height and compare it to Earth's. Estimate the density of the "air" at an elevation of 10 km.