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The number of elementary entities in a mole of the substance.

The elementary entities depends on the particles making up the substance. For example, argon is made of single atoms, so a mole of argon simply contains Avogadro's number of atoms.

Water, on the other hand, is made of molecules, so a mole of water contains Avogadro's number of molecules. Now each water molecule, H2O, contains 3 atoms so a mole of water contains 3xAvogadro's number of atoms.

Sodium chloride, NaCl, is made of sodium and chloride ions, in a ratio of 1:1. So a mole of sodium chloride contains Avogadro's number of sodium ions, and Avogadro's number of chloride ions. A mole of sodium chloride therefore contains 2xAvogadro's number of ions in total.

The number comes from the number of carbon atoms in 12g of carbon-12.

Q: What is Avogadro's number the number of?

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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.

By saying Avogadro's number of atoms, you are saying one mole (or 6.02 Ã— 1023 atoms). And one mole of any elements is its atomic mass. Phosphorus' atomic mass is 31.0 grams

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

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.

1 mole has 6,022 140 857 (74).1023 molecules, atoms, ions.