Find the number of moles of aluminum in a 3.90 x 1022 atoms sample.

Explanation:

Hi there!

We have,

1 mole of Al = 6.23* atoms

Also given no. of atoms = 3.90 x atoms

Now,

6.23* atoms= 1 mole

1 atom = moles

or, 3.90 x atoms =   *3.90 x moles

Therefore, 3.90 x atoms has 0.0626 mols of Al.

Hope it helps!

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