In organic chemistry, a pyrrole is a five membered aromatic ring, 4 elements of which are carbonatoms, one element of which is a nitrogen atom. The molecular formula for a pyrrole is C4NH5. The structure is:
... 6.9% who are 65 years of age or older. The median age is 34 years. For every 100 females there are 96.1 males. For every 100 females age 18 and over, there are 93.9 ...