pass into the air, where it is degraded by processes induced by light from the sun.

The Henry $s$ law constant for $m-$xylene in water at $25C$ is $370$atm, when the following form of the law is used:

$P_{m^{-\text{x}\text{y}\text{l}\text{e}\text{n}\text{e}}}=k_{m^{-\text{x}\text{y}\text{l}\text{e}\text{n}\text{e}}}{x}_{m^{-\text{x}\text{y}\text{l}\text{e}\text{n}\text{e}}}$

$P_m{?}_{m-\text{x}\text{y}\text{l}\text{e}\text{n}\text{e}}=|,|$ atm

molecules per cubic centimeter