In the reaction +n2-> 2nh3 what coefficient should be placed in front of h2 to balance the reaction?

a. 1
b. 2
c. 3
d. no coefficient is needed

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.