An ongoing international effort to redefine the kilogram by 2018 has been helped by recent efforts from a team researchers from Italy, Japan and Germany to correlate two of the most precise ...

I MUST plead guilty to the charge of not having made a very deep search of the older literature in connexion with the evaluation of ‘Avogadro's Number’. This name has only come into general use in ...

1 mol is the amount of substance that contains the same number of particles as there are atoms in 12.0 g of carbon-12.

October 23 is marked as Mole Day to commemorate Avogadro's Number 6.02 x 10²³ which is a basic measuring unit in chemistry. Mole Day was created as a way to foster interest in chemistry. Schools ...

For over a century, a golf-ball sized cylinder locked in a vault in Sèvres, France, has defined the true mass of a kilogram (2.2 pounds) for the entire planet. The International Prototype of the ...

The great Physicist Albert Einstein, who lived from 1879 to 1955, in his thesis "A New Determination of Molecular Dimensions" determines molecular dimensions and Avogadro’s number through viscosity ...

Today is Oct. 23, which in the U.S. is written as 10/23. That means it’s Mole Day! For the nongeeky, nonsciencey types out there, a mole is a number used in chemistry quite a bit. It’s used to ...