$1.$ A $100-$liter empty jar is spiked with $20mg$ of TCE$(C_{2}HC{l}_3)$ under room temperature

$($ambient$)$ condition. The jar was then closed tightly. What is the concentration $($in atm.$)$ of

TCE in the air at $25C?($TCE: MW: $131\mathrm{.}4\frac{g}{m}ol$; TCE solubility in water $(Cs)=1100$

$m\frac{g}{L}$;$P^v($pure liquid at $25C)={10}^{-1\mathrm{.}01}$atm.$K_H={10}^{1\mathrm{.}03}Lat{m}^{-1}$;$K_{OW}={10}^{2\mathrm{.}42}).$

$2.$From last problem, if the jar was half filled with water and half filled with air, what were the

concentrations of TCE $($in $m\frac{g}{L})$ in both air and water at $25C?$