What is the mass of 6×1022 zinc atoms?

1 Answer
anor277
Jun 8, 2017

Well, we use the molar quantity, NA=6.022×1023⋅mol−1, and gets approx. a mass of 6.5⋅g.

Explanation:

We know that NA zinc atoms, i.e. 6.022×1023 individual zinc atoms, have a mass of 65.39⋅g precisely. How do we know this? Well, because we has access to a Periodic Table, and this EXPLICITLY tells us the mass of a molar quantity.

And so we simply have to take the equivalent mass of zinc metal, i.e. 6×1022⋅zinc atoms6.022×1023⋅zinc atoms⋅mol−1×65.38⋅g⋅mol−1=??g.

Capisce? This is a very important concept to master in the study of chemistry.

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