# What is "Avogadro's Number"?

See this old answer and links for a full treatment. You should remember that $\text{Avogardo's Number}$ is simply a number of convenience, convenience that $\text{Avogardo's Number}$ of ""^1H atoms has a mass of $1.0 \cdot g$ precisely. It is thus the link between grams and litres to the micro world of atoms and molecules.