The equation below is sometimes called the Einstein-Smoluchowski equation and describes the estimated time between collisions for molecular diffusion. Where t is time, x is distance and DAB is the diffusion coefficient. t=2DABx2 Use this equation to estimate how long a particle would travel in 1min in the liquid phase assuming a typical liquid diffusion coefficient of 105cm2/s 0.0346cm0.0012cm2105cm0.00447cm