shows two compartments separated by a semipermeable membrane that is permeable to the solvent water but not to the solute. The concentration of the solute is $145$ mMmM on the right side of the membrane and $50$ mMmM on the left side. Suppose that the membrane is suddenly made permeable to the solute, as can happen in cells when voltage$-$gated ion channels open, and that the diffusion constant for the solute through the membrane is $5\mathrm{.}01010$m$2/$s$5\mathrm{.}01010$m$2/$s$.$ What is the initial rate of flow of the solute in molecules$/$smolecules$/$s through $10$ m$2$m$2$ of a $7\mathrm{.}0-$nmnm$-$thick membrane? These values are comparable to the surface area and thickness of a cell membrane.