For 10 points, name this pale blue gas depleted by chlorofluorocarbons, a triatomic allotrope of oxygen.
This compound's absorption coefficients were developed by Bass and Paur, and this compound attacks elastomers in a reaction that causes cracking. One reaction of this compound is a 1,3-cycloaddition with alkenes that proceeds via an intermediate named for Criegee. This compound cleaves alkenes in that reaction, and Sydney Chapman is known for his work on this compound, whose density is reported in Dobson units. This compound is formed when nitrogen dioxide is cleaved to form nitric oxide, and it is also formed by ultraviolet radiation during a process in which it converts radiation to heat in the stratosphere. For 10 points, name this pale blue gas depleted by chlorofluorocarbons, a triatomic allotrope of oxygen.
This compound's absorption coefficients were developed by Bass and Paur, and this compound attacks elastomers in a reaction that causes cracking.
ozone [accept O3 before "triatomic"]