Question

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

Answer 1

Step-by-step 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 =
`(1 )/(6.23*10^(23))` moles

or, 3.90 x
`10^(22)` atoms =
`(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!