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Calculate the number of moles in 12.044 ...

Calculate the number of moles in `12.044 xx 10^(23)` helium atoms.

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`6.022 xx 10^(23)` helium atoms = 1 mole
`12.044 xx 10^(23)` helium atoms
`=1/(6.022 xx 10^(23)) xx 12.044 xx 10^(23) = 2` moles
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