Bisphenol A $($BPA$)($chemical formula: C $15$ H$16$ O$2),$ a contaminate in ground water, is diffusing

into an inert porous mineral particle at $25\backslash$deg C$.$ The porous particle has a void fraction of $0\mathrm{.}25$

with a mean pore diameter of $0\mathrm{.}10\backslash$mu m$,$ and the pores are filled with groundwater. The mass

concentration of BPA in the groundwater surrounding the particle is $0\mathrm{.}05$ g$/$L$,$ which is below

its solubility limit$.$

What are the mole and mass fractions of BPA in the groundwater?