Chlorofluorocarbons such as `C Cl_(3)F` (molecular mass=137.5) and `C Cl_(2)F_(2)` (molecular mass=121) have been linked to ozone depletion in Antarctica. A research reported that the concentration of these gases are 240 and 800 parts per trillion `(10^(12))`, by volume respectively. what are the concentrations of these gases (in moles per litre). under conditions typical of Antarctic stratosphere (200K and 0.05 atm)? (R=0.08L-atm/K-mol)

Options

A. `[C Cl_(3)F]=7.5xx10^(-13)` mol/L
B. `[C Cl_(3)F]=1.75xx10^(-12)` mol/L
C. `[C Cl_(2)F_(2)]=2.5xx10^(-12)` mol/L
D. `[C Cl_(2)F_(2)]=6.6xx10^(-12)` mol/L

Answer

a,c