Chapter 10, Problem 84A

Interpretation Introduction

Interpretation:

The number of atoms of potassium in 1 mole of it needs to be determined.

Concept introduction:

The mole concept provides the relation between moles, mass and molar mass. The mathematical expression of mole concept can be written as:

$\text{Mole =}\frac{\text{Mass}}{\text{Molar mass}}$

Answer to Problem 84A

$\text{6}\text{.022 }\times {\text{ 10}}^{\text{23}}$ number of atoms in 1 mole of potassium atom.

Explanation of Solution

The mole concept states that 1 mole of any substance contains a certain number of atoms or particles. It is called as Avogadro’s number and value of this constant $\text{6}\text{.022 }\times {\text{ 10}}^{\text{23}}$. Thus 1 mole of any substance contains $\text{6}\text{.022 }\times {\text{ 10}}^{\text{23}}$ number of particles or atoms or molecules.

Thus there must be $\text{6}\text{.022 }\times {\text{ 10}}^{\text{23}}$ number of atoms in 1 mole of potassium atom.

Conclusion

$\text{6}\text{.022 }\times {\text{ 10}}^{\text{23}}$ number of atoms in 1 mole of potassium atom.