Your answer is incorrect.

The solubility of pure oxygen in water at $20\mathrm{.}0C$ and $760$ torr is $4\mathrm{.}30{10}^{-3}g{O}_2$ per liter $H_{2}O.$

When air is in contact with water and the air pressure is $637$ torr at $20\mathrm{.}0C,$ how many grams of oxygen from the air dissolves in $1\mathrm{.}00L$

of water?

The average concentration of oxygen in the air is $21\mathrm{.}1\%(\frac{v}{v}).$

$g{O}_2$