Onemolecule of it is combined with sulfur dioxide in the first step of the (*) contact process, whicheventually produces sulfuric acid.
This compound causes pyrogallol solution to turn colorless. Methods of measuring the amount ofthis compound in solution include adding manganese sulfate and potassium iodide in the Winklertest. Another method to measure its concentration uses a zirconia probe. Molecular orbital theory isused to explain why its triplet form is paramagnetic, and its singlet form is very reactive. Onemolecule of it is combined with sulfur dioxide in the first step of the (*) contact process, whicheventually produces sulfuric acid. Subjecting it to strong electric shocks transforms it into its triatomicform, which is called ozone. For 10 points, name this diatomic gas, which comprises 21% of Earth'satmosphere and is exchanged with CO2 in respiration.
This compound causes pyrogallol solution to turn colorless. Methods of measuring the amount ofthis compound in solution include adding manganese sulfate and potassium iodide in the Winklertest.
 Diatomic oxygen [or O2 ]