Respuesta :

Answer:- [tex]2.68*10^2^4[/tex] atoms of Cu are equals to 4.45 moles.

Solution:- It is a atoms to moles unit conversion for which we divide the given number of atoms by Avogadro number.

[tex]1 mol = 6.02*10^2^3 atoms[/tex]

We have been given with [tex]2.68*10^2^4[/tex] atoms and asked to convert them to moles.

The set up for this unit conversion problem would be as:

[tex]2.68*10^2^4 atoms(\frac{1mol}{6.02*10^2^3 atoms})[/tex]

= 4.45 moles

So, there would be 4.45 moles of Cu in [tex]2.68*10^2^4[/tex] atoms of Cu.

Explanation:

According to the mole concept, 1 mole of an atom contains [tex]6.022 \times 10^{23}[/tex] atoms.  

As it is given that there are [tex]2.68 \times 10^{24}[/tex] atoms and we will calculate the number of moles present as follows.

       [tex]\frac{2.68 \times 10^{24} atoms}{6.022 \times 10^{23} atoms}[/tex]

                 = 4.45 mol es

Therefore, we can conclude that there are 4.45 mol  present in [tex]2.68 \times 10^{24}[/tex] atoms.

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