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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