I have to evaporate a certain amount of ethanol(l) from a flask to a chamber. The chamber should have around 300 ppm of ethanol(g) in it. How much ethanol(l) do I initially have to evaporate?

Flask volume 500mL
Chamber volume = 1.65L
ethanol MM = 46.06844 g/mol
density = 789 kg/cm^3

please answer asap thank you!!

We don't do your homework. Its part of the site rules you agreed to. Show us your work, and what you have then we might be able to steer you in the right direction.