11.19 The radius of an air molecule is approximately 1.81010m, its mass is about 4.81026kg, and it has 5 degrees of freedom. The molecular weight of air is 29 and its density is 1.29kgm3 under standard conditions. (a) Estimate the values of the coefficient of viscosity , the thermal conductivity , and the diffusion coefficient D under these conditions. (b) Check that for air, cvM1andD1 Also, check that these quantities are indeed dimensionless