For a system in equilibrium, the rate constant for the forward reaction is represented by kf and the rate constant for the reverse reaction is represented by kr. Which equation represents the equilibrium constant for this reaction in the forward direction?

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.