Fascinating Facts

Avogadro Number

• The entire Karnataka State may be submerged to a depth of much more than 100 kilometers.
• You can calculate and check
• Consider 20 drops as 1Cm³
• Find the volume of Avogadro number of drops. This volume will be in Cm³
• Convert the volume into Km^3.
• Divide it by the area in Km². The answer will be the height in Km.
• Your life time will not be sufficient to distribute that wealth. In fact it will take thousands of years.
• Again you can calculate and check.
• Number of people x 1000 x 60 x 60 x 24 x 365 . This will be the amount you will spend in a year.
• Find how many years you will need to spend Avogadro number of Ruppees.
• Spending one billion a second it would take 19 million years.

• Avogadro number(N) is defined as the number of Carbon-12 atoms in 12g of C-12.
• Avogadro number of particles(N) is considered as 1 mole of particles. Thus Avogadro number of methane molecules(N) will be one mole of methane. 16g of methane (molecular weight of methane is 16)will contain N molecules of methane, they will occupy 22.4 liters under standard conditions.
• Thus one mole of any gas under standard conditons will occupy 22.4 liters. This is called "gram molecular volume".
• The precise number is unknown, since it is not possible to physically count the number of atoms.
• It is normally considered as 6.023 x10²³
• More accurately 6.0221415 x 10²³ (with an uncertainty of 0.000 0010 x 10²³)
• There are many ways available for estimation of this number, the most accurate for the present being through X-ray studies of crystals.
• A number of web sites are available which give information about these methods and other fascinating details. Just browse for Avogadro number.