How many chromium atoms in a #5.67*g# mass of chromium metal?

1 Answer
anor277
May 3, 2016

In #5.67*g# chromium metal?

Explanation:

The molar mass of elemental chromium is #52.00*g*mol^-1#. What does this mean? It means that if there are #52.00*g# of chromium metal, there are #"Avogadro's number"# of chromium atoms, i.e. #N_A# chromium atoms, or #6.022xx10^23# individual atoms.

Here, I have used #N_A# as I would a dozen, or a score, or a gross, or any other collective number.

So the number of atoms?

#(5.67*g)/(52.00*g*mol^-1)xx6.022xx10^23*mol^-1# #=#

#"How many chromium atoms?"#

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