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Biology 19 Online
OpenStudy (paprchasr):

Which substance is a combination of different atoms?

OpenStudy (habbababba1):

where are the choices?

OpenStudy (3mar):

such as water \[H_2O\] and methane \[CH_4\] and carbon dioxide \[CO_2\]

OpenStudy (mimi776):

water

OpenStudy (osprey):

Anything that's not a pure element ??????

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