Two sets A and B are disjoint if they have no elements in common (their intersection is the null set).
show more Ozone, O3(g), is a form of elemental oxygen that is important in the absorption of ultraviolet radiation in the stratosphere. It decomposes to O2(g) at room temperature and pressure according to the following reaction: 2O3(g)>3O2(g) (Delta)H = -284.6 kJ.
Ozone, O 3, is a very reactive blue gas characterized by a pungent electrical smell (the name ozone derives from the Greek ozein, to smell). Ozone molecules are bent with a bond angle of about 117Â° in the gas phase.