Answer: Diffusivity of xylene is is 0.00012 m²/s in air at 0°C and 1 atm. the Schmidt number is not fixed for xylene, it is usually one and of 10² depending on temperature in air.
Explanation:
Diffusivity is a rate of diffusion which is measure of the rate at which fluids can spread.
Schmidt number of a fluid is a dimensionless number defined as the ratio of momentum diffusivity (i.e.kinematic viscosity) and mass diffusivity, Schmidt number is used to characterize fluid flows.