A solid drug pellet with a top$-$surface susceptible to oxidation is covered with double layers of polyethylene $1\mathrm{.}0$mm thick and

nylon $0\mathrm{.}8$mm thick to prevent oxygen contact and kept in a container of $30\backslash$deg C$.$

Assume the oxygen pressure in the container is $0\mathrm{.}7$atm and that inside the drug is

$0\mathrm{.}1$atm. Estimate the oxygen amount $($in moles$)$ that would penetrate into the top$-$

surface area of drug with $1$cm diameter after $1$ weeks storage. Use Table $6\mathrm{.}5-1$

when needed. $(30$ point$)$