Answer: The moles of potassium element is 1.30 moles.
Explanation:
We are given:
Number of potassium atoms = [tex]7.85\times 10^{23}[/tex]
According to mole concept:
[tex]6.022\times 10^{23}[/tex] number of atoms are contained in 1 mole of an element
So, [tex]7.85\times 10^{23}[/tex] number of atoms will be contained in [tex]\frac{1}{6.022\times 10^{23}}\times 7.85\times 10^{23}=1.30mol[/tex] of potassium element
Hence, the moles of potassium element is 1.30 moles.
