Can some one me answer these as soon as possible hurry will give the brainliest

How can you increase the ability of a gas to dissolve in a liquids?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.

How do you know when a chemical reaction has occurred