These are the direct formulas.. can someone plzz explain this

Formulae for 1 2 To'n Ct N Where d = diameter of molecule, n = No. of molecules per unit volume = NV A 22 mn Where mn = p = density of gas 2o mn m Where = 2 Where n = coefficient of viscosity C= average velocity. PC 3K Where K = coefficient of thermal conductivity C, = Specific H pCC constant volume 3D Where D = coefficient of diffusion. Dependence of On density of gas P On mass of gas ( oc m) On temperature of gas ( c T) On pressure of gas