Chapter U4.9, Problem 3E

Interpretation Introduction

Interpretation: The reason behind the conversion between moles and grams by chemists is to be explained.

Concept introduction: The number of particles present in twelve grams of C-12 is defined as the mole.

Answer to Problem 3E

The calculations become easy when dealing with chemical reactions in terms of moles as the chemical reaction is expressed in terms of atoms and molecules.

Explanation of Solution

Most of the chemical reactions take place at such a level that it becomes difficult to use grams. Thus, mole can be easily used for the calculations. Moles provide an easy way of conversion between the number of molecules or atoms and their mass. One mole of particles is equal to $6.022\times {10}^{23}$ particles. The chemical reactions are also written in the number of atoms or molecules. Therefore, it becomes easy to use moles rather than using mass.

Conclusion

The calculations become easy when dealing with chemical reactions in terms of moles as the chemical reaction is expressed in terms of atoms and molecules.