How many carbon atoms of mass 12.00 a m.u. are in 12.00 g of C?

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How many carbon atoms of mass 12.00 a m.u. are in 12.00 g of C?

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Answer 1 · 2016-02-04T17:12:57

To a first approximation, there are Avogadro's number of such carbon atoms, i.e. $6.022xx10^23$ carbon atoms.

Explanation:

By definition, there are Avogadro's number of carbon atoms in $12.00$ $g$ of $""^12C$ . The atomic mass of $C$ on the Periodic Table appears as $12.011$ $g$ because of the existence of $""^13C$ and $""^14C$ isotopes, which slightly inflate the molar mass.

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How many carbon atoms of mass 12.00 a m.u. are in 12.00 g of C?

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