Chapter 7, Problem 3PE

Interpretation Introduction

Interpretation:

The number of molecules present in $0.25\text{mole}$ of ammonia is to be calculated.

Concept introduction:

A mole of a substance is defined as the same number of particles of the substance as present in $12\text{g}$ of ${}^{\text{12}}\text{C}$. The number of molecules present in one mole of a substance is $6.023\times {10}^{23}$ molecules.