Question

How many mol of potassium are represented by 7.85 x 10^23 potassium atoms?

Answer 1

Answer: The moles of potassium element is 1.30 moles.

Explanation:

We are given:

Number of potassium atoms = $7.85\times 10^{23}$

According to mole concept:

$6.022\times 10^{23}$ number of atoms are contained in 1 mole of an element

So, $7.85\times 10^{23}$ number of atoms will be contained in $\frac{1}{6.022\times 10^{23}}\times 7.85\times 10^{23}=1.30mol$ of potassium element

Hence, the moles of potassium element is 1.30 moles.

Answer 2

1 mole has 6.02 ×10^23 so if divide 7.85×10^23 by mole number : 7.85/6.02=1.3 mole