Best Answer

Up till now this corresponds to a value of 6.02214179(30)*1023 elementary entities. (SI unit mol). (uncertainty +/- 5 ppb)

However this might (almost certainly) change in near future (2012?) when SI is 'updating' international standards, definitions and values of the fundamental constants.

(Yes, even the 'standard kilogram' might bere-defined; what a piety for the Paris Standard)

From:

"The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is 'mol.' "

(14th CIPM (1971, Resolution 3; CR, 78)

In a note to the CIPM in October 2009, Ian Mills, the President of the CIPM (Consultative Committee - Units (CCU) cataloged the uncertainties of the fundamental constants of physics according to the current definitions and their values under the proposed new definition.

He urged the CIPM to accept the proposed changes in the definition of the ....

kilogram, ampere, kelvin and mole so that they are referenced to the values of the fundamental constants, namely Planck's constant (h), the electron charge (e), Boltzmann's constant (k), ....

.... and ....

Avogadro's constant (NA): [There is a broad consensus in the chemical community of the advantages in fixing NA, (fixing means: uncertainty nill ppb)]

Lit. cit. [ Ian Mills, President of the CCU (2009-10). "Thoughts about the timing of the change from the Current SI to the New SI". CIPM. Retrieved 2010-02-23.]

Q: What does avogadro's number represent?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

atoms in 12 g of c-12

The unit is "per mole", or mol^-1.

Avogadro's number represents the number of units of a substance in one mole of the substance. These units may be electrons, atoms, ions, or molecules, depending on the substance.

A mole of any substance has the Avogadro's number of such units. As an example, a mole of hydrogen atoms is equivalent to 6.022 x 1023 atoms.

You represent a repeating number by putting a dash on top of the number. For example 56.1066666 you represent it by putting a dash on top of the 6

Related questions

A mole.

No.

Its avogadros number

I asked this question wrong. It should be Avogadros Number. Sorry!

atoms in 12 g of c-12

It is 6.02 (times) 10 to the power of 23

The unit is "per mole", or mol^-1.

It is the number of fundamental particles - atoms or molecules - of a substance in 1 mole of that substance.

There is 1 mole of atoms in 6.022 x 10^23 atoms of any element.

Its avogadros number which is 6.02 X 10^23 g/mol

it can represent any number it can represent any number it can represent any number it can represent any number it can represent any number

Avogadro's number represents the number of units of a substance in one mole of the substance. These units may be electrons, atoms, ions, or molecules, depending on the substance.