Question

2.68 x 10^24 atoms of Cu equal how many moles? Help!!!

Answer 1

Explanation:

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

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

       $\frac{2.68 \times 10^{24} atoms}{6.022 \times 10^{23} atoms}$

                 = 4.45 mol es

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

Answer 2

Answer:- $2.68*10^2^4$ 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.

$1 mol = 6.02*10^2^3 atoms$

We have been given with $2.68*10^2^4$ atoms and asked to convert them to moles.

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

$2.68*10^2^4 atoms(\frac{1mol}{6.02*10^2^3 atoms})$

= 4.45 moles

So, there would be 4.45 moles of Cu in $2.68*10^2^4$ atoms of Cu.