Chapter 10, Problem 86A

Interpretation Introduction

Interpretation:

The reason for mole to be an important unit to chemists needs to be explained.

Concept introduction:

In 1 mol of any substance, there are $6.022\times {10}^{23}$ units of that substance. These units can be atoms and molecules. The number of units in 1 mol of any substance is known as Avogadro’s number. It is denoted by symbol N_A.

Explanation of Solution

The unit of amount in chemistry is known as mole. It helps in determining the atoms and mass of the material. It helps chemists to determine the amount of two substances like Copper and iron such that one can obtain equal amount of both.

There are $6.022\times {10}^{23}$ units in 1 mol of a substance. The representative particles depend on the type of the substance. For example, for a compound, the representative particles are molecules and it is atoms in the case of elements.

Conclusion

Chemists use the mole for knowing the representative particles in the sample.