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10 cards from this deck
Molecules with halogen atoms bonded to carbon chains
Stratosphere, 10-40 km above Earth's surface
Absorbs harmful UV-B radiation from the Sun
Strong carbon-halogen bonds make them unreactive
\ceC−Cl\ce{C-Cl}\ceC−Cl bond (lowest bond enthalpy)
\ceClO•\ce{ClO•}\ceClO• + \ceO2\ce{O2}\ceO2
Regenerated in step 2, attacks more \ceO3\ce{O3}\ceO3 molecules
Approximately 100,000
1987, phased out CFCs to protect ozone layer
Don't contain chlorine atoms
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