The chemical formula for chlorine molecule which contains two chlorine atoms is what

Chlorine is counted among this group along with hydrogen (H2), iodine (I2), bromine (Br2), oxygen (O2), nitrogen (N2) and fluorine (Fl2). With seven electrons in its outermost orbit--one electron short of a "stable eight"-- the element chlorine exists in nature as a diatomic molecule.

Explanation:

it should be p1 v1 = p2 v2