What information does a compound's empirical formula give us? A) The elements that are involved, and in which ratio they have combined

B) The exact number of atoms of each element that have combined

C) B only

D) A and B​

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.