Vinyl chloride $(C_2{H}_{3}Cl)$ is sometimes found in drinking water and in the air we breathe, and is a confirmed carcinogen.

a$.$ What is the mass concentration of vinyl chloride in water $(\frac{g}{L})?$ Assume $[C_2{H}_{3}Cl]=80ppb$

b$.$ What is the mass concentration of vinyl chloride in air $(\frac{g}{L})?$ Assume: $[C_2{H}_{3}Cl]=80ppbT=293K,P=1$atm

$3.$ Global $C{O}_2$ accumulation

The figure below shows the level of carbon dioxide in the atmosphere as a function of time since $1958.$ The atmospheric abundance is shown to have increased from $315ppm$ in $1960$ to $420$ ppm in $2023.$ Thus, the total mass of carbon in the atmosphere in $2023$ was $895{10}^{15}$gram Carbon $(gC)=895$ gigaton Carbon $($GtC$).$ It is worth knowing that the mass of the atmosphere is $5\mathrm{.}15{10}^{18}kg.$