Question

Why does oxygen dissolve in water despite it beeing non polar?

Answer 1

Like carbon dioxide, oxygen can be forced to dissolve in water if you increase the pressure in the system, and additionally the temperature of the water is important too (higher solubility in colder water than hot water).

Hope this helps you

Answer 2

Hell.. Oo

Because they are polar and therefore are also dipoles. That means they have the same dipole-dipole interactions with water as water has with itself. This means water likes hanging out with other polar molecules almost as much as it likes being around other water molecules.