1a (1 point ) consider two different protein molecules which

(1 point ) consider two different protein molecules which arw both spherical, but one has a molar mass which 8 times the other . What is the diffusion coefficient in water of the larger molecules relative to the smaller ?
1b (1 point) a spherical molecule has diffusion coefficient of 5×10^_11 m^2/s in water .how long will it take one third of such molecules to diffuse a daistance of at least 1 um in am E. Coil cell where the viscosity is 5 times as great as the viscosity of water ?