- 24 Oct 2019
- 2 min read
Mole Day is an unofficial holiday celebrated among chemists, chemistry students and chemistry enthusiasts on October 23, between 6:02 AM and 6:02 PM, making the date 6:02 10/23 in the US date format.
- The time and date are derived from Avogadro's number, which is approximately 6.02×10 ^ 23, defining the number of particles (atoms or molecules) in one mole of a substance, one of the seven base SI units.
- The seven base units in the SI system are:
- the kilogram (kg), for mass
- the second (s), for time
- the kelvin (K), for temperature
- the ampere (A), for electric current
- the mole (mol), for the amount of a substance
- the candela (cd), for luminous intensity
- the meter (m), for distance
- The day was created to foster an interest in chemistry.
- The number of particles (atoms, molecules or ions) present in 1 mole of any substance is fixed, with a value of 6.022 × 1023.
- This is an experimentally obtained value. This number is called the Avogadro Constant or Avogadro Number (represented by N0), named in honour of the Italian scientist Amedeo Avogadro.
- 1 mole (of anything) = 6.022 × 1023 in number, as, 1 dozen = 12 nos.
- The Avogadro constant 6.022 × 1023 is defined as the number of atoms in exactly 12 g of carbon-12.