avriana
avriana
20-01-2017
Mathematics
contestada
I don't understand #9
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Аноним
Аноним
20-01-2017
You can't see real helium atoms?
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Beccaboo183
Beccaboo183
20-01-2017
in real life u cant see the atoms so your right you can see them on the paper but not in the actual air
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