Q:  For the atomic hydrogen cloud, which term is larger:
         KE or GPE?  How will this cloud evolve?


           The atomic cloud has a much larger KE; thus, it will
           not collapse, and may expand if in isolation.

              

  Q:  For the molecular hydrogen cloud, which term is larger:
         KE or GPE?  How will this cloud evolve?


           The molecular cloud has a much larger GPE; thus, it will
           collapse.