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**Avogadro's number**is closely related to the Loschmidt

**constant**, and the two concepts are sometimes confused.) It was initially defined by Jean Perrin as the

**number**of atoms in 16 grams of oxygen. In particular, when carbon-12 was the reference, one mole of carbon-12 was exactly 12 grams of the element.

Also, how was Avogadro's number determined?

If you divide the charge on a mole of electrons by the charge on a single electron you obtain a value of **Avogadro's number** of 6.02214154 x 10^{23} particles per mole.

**Mole**Units Got Its Name The

**mole**is a unit used in chemistry that is equal to

**Avogadro's number**. It is the

**number**of carbon atoms in 12 grams of the isotope carbon-12. The word

**mole**comes from the word molecule. It is not related in any way to the animal

**called**the

**mole**.

Also, what is Avogadro's number and what does it mean?

**Definition** of **Avogadro's number**. : the **number** 6.022 × 10^{23} indicating the **number** of atoms or molecules in a mole of any substance. — called also Avogadro **number**.

Re: When to **use Avogadro's number** So if **you** have half of a mole then **you**'ll have 3.011 x10^23 molecules, atoms or particles. So **Avogadro's number** is really important to connect the macroscopic quantities like grams with the microscopic quantity like **number** of atoms.