Which of these reactions are unimolecular and elementary, which are bimolecular and elementary, and which are not elementary?
a) HCl(g)+H2O(g)--->H3O(g)+Cl-(g)
b)I-(g)+CH3Cl(g)--->ICH3(g)+Cl-(g)
c)C2H6(g)--->C2H4(g)+H2(g)
d)N2(g)+3H2(g)--->2NH3(g)
e) O2(g) +O(g)--->O3(g)