Chemistry - Concentration Terms Question with Solution | TestHub

Chlorofluorocarbons such as ${\mathrm{CCl}}_3\mathrm{F}(\mathrm{M}=137.5)$ and ${\mathrm{CCl}}_2{\mathrm{F}}_2(\mathrm{M}=121)$ have been linked to ozone depletion in Antarctica. As of 2004, these gases were found in 275 and 605 parts per trillion $\left(10^{12}\right)$, by volume. What are the concentrations of these gases under conditions typical of Antarctica stratosphere (200 K and 0.08 atm)? (R $=0.08\mathrm{I}-\mathrm{atm}/\mathrm{K}-\mathrm{mol}$ )