This is a chemistry lesson discussing Avogadro s number. This is a series of science oriented videos the University of Nottingham. Since its conception in April 9, 2009, it has been updated frequently. This video forums is aimed to familiarize its viewers with symbols and concepts applicable in Astronomy, Mathematics and Physics through experiments and try to relate its applicability to current life situation. Due to the videos popularity, they have expanded their videos from their initial goal.