S1.4 (1) Counting particles by mass: the mole
This page covers the mole concept and Avogadro's constant, NA. It includes relative atomic mass, Ar and relative formula mass Mr which leads to understanding and calculating emprical and molecular formulas and formula masses. How do we quantify matter on the atomic scale? Although Avogadro’s number is probably the best known number in chemistry, Avogadro himself knew nothing about its value or the concept of the...