Question

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

Answer 1

Answer:

Explanation:

Hi there!

We have,

1 mole of Al = 6.23*$10^{23}$ atoms

Also given no. of atoms = 3.90 x $10^{22}$ atoms

Now,

6.23*$10^{23}$ atoms= 1 mole

1 atom = $\frac{1 }{6.23*10^{23}}$ moles

or, 3.90 x $10^{22}$ atoms =  $\frac{1 }{6.23*10^{23}}$ *3.90 x $10^{22}$ moles

Therefore, 3.90 x $10^{22}$ atoms has 0.0626 mols of Al.

Hope it helps!