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Ozone tarnishes silver metal. How many n...

Ozone tarnishes silver metal. How many number of moles of `O_(2)` are evolved?

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`{:(2Ag+O_(3)to Ag_(2)O+O_(2)),(ul(Ag_(2)O+O_(3)to2Ag+2O_(2))),(2Ag+2O_(3) to 2Ag+3O_(2)):}`
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