In chemistry, the unit “mole” is used in many places, and is an important tool when working with quantities. If we express the R.A.M. of any element in grams, this must contain the same number…

For practical purposes, a microscopic (i.e. how many atoms) view of substances is not useful. We need to deal in macroscopic (e.g. how many grams) quantities of elements and compounds. To do this, we introduce…