How many atoms of cobalt are in 8.98 moles of cobalt?

1 Answer
anor277
Sep 9, 2016

#8.98xxN_A# #"cobalt atoms"#

Explanation:

#N_A, "Avogadro's number"# specifies #6.0221xx10^23# individual particles. It is simply another collective number like a dozen, or a score, or a gross. #N_A# has the property that #6.0221xx10^23# individual cobalt atoms has a mass of #58.93*g#. How did I know that? Did I have it memorized?

So the quantity is #approx# #54xx10^23# cobalt atoms.

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