Titan, the largest satellite of Saturn, has a thick nitrogen atmosphere. At its surface, the pressure is 1.5 Earth-atmospheres and the temperature is 94 K.

What is the surface temperature in C? Express your answer in degrees Celsius.

Calculate the surface density in Titan's atmosphere in molecules per cubic meter. Express your answer as a number of molecules per meter cubed.

Calculate the density of Earth's atmosphere at 22 C. Express your answer as a number of molecules per meter cubed.