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doit_the_clown doit_the_clown
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7 years ago
The ozone molecule, important in absorbing harmful solar UV radiation before it reaches the Earth's surface, consists of

(a)   three oxygen atoms.
(b)   two oxygen atoms.
(c)   one oxygen atom and one hydrogen atom.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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