So let's plug these guys in into this equation and we got this by rearranging this, by bringing all these guys on this side. So we got that. So we plug in our atmosphere pressure zero point 13 ATMs over our constant times, our temperature times I or one. So ATMs cancel, the Kelvins cancel and we get 5.31 times ten to negative four moles per liter. So this is our molarity. Now let's find the number of moles of polymer.