# DEFINE MOLE CONCEPT & ITS FORMULAS?/

The answer provided by puntirock717 is correct and easy to understand. please read the answer.

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The Mole Concept:

One mole of a substance (atoms, molecules, ions, or particles) is that quantity in number having a mass equal to its atomic or molecular mass in grams. One mole of any substance contains 6.022 �10 23 particles (atoms, molecules, or ions). This means that one mole atom of any substance contains 6.022 �023 atoms. Similarly, one mole molecule of any substance contains 6.022 �023 molecules, and one mole ion of any substance contains 6.022 �023 ions. Hence, the mass of a particular substance is fixed.

 The number 6.022 �1023 is an experimentally obtained value and is known as Avogadro’s number or Avogadro constant (represented by N o ). It is named after the Italian scientist, Amedeo Avogadro

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One mole is defined as No entities of the substance, where No is equal to Avogadro’s number. The number is generally taken as 6.022 X 1023. Moles measure quantity of substance.

Mole Concept:

As group of 12 of anything is called one dozen, similarly, 6.022 × 1023 number of entities is called one mole. The entities may be atoms, molecules or any other particles.

Mole is also called Avogadro constant which is denoted by NA.

As per definition- One mole is the amount of a substance that contains as many particles or entities as there are atoms in exactly 12 g of the C-12 isotope.

Learn the mole concept table

 Mole Relationship 1 Mole 6.022 × 1023 22.4 L at STP Gram Atomic Mass-GAM Gram Molecular Mass-GMM Categories No of moles No of particles Volume Mass mass

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Mole concept allows counting atoms molecules and amount of substance during reaction. For example the diagram is a simple method to learn the conversion from one unit to other. • -1

Atoms and molecules are very small in size but their numbers in even a small amount of any substance is very large. To handle these large numbers a unit of similar magnitude is required. Just as we denote dozen for 12 items and score for 20 items, we use mole for microscopic entities. 1 mole can be defined as “ the amount of substance that contains as many specified elementary particles as the number of atoms in 12 grams of carbon-12 isotope .”

Now, mass of a carbon-12 atom = 1.99 �10-23g Hence, 1 mole = 6.022 �1023atoms
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Formulas:-

i). no of moles = given mass/ gram atomic mass (gAm) or gram molecular mass (gMm)

ii). no of moles = no of patrticles x avogadro 's number

iii). mass = no of moles x gAm or gMm

iv). no of particles = no of moles x avogadro constant

Hope this helps.

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The Mole Concept:

One mole of a substance (atoms, molecules, ions, or particles) is that quantity in number having a mass equal to its atomic or molecular mass in grams. One mole of any substance contains 6.022 �10 23 particles (atoms, molecules, or ions). This means that one mole atom of any substance contains 6.022 �023 atoms. Similarly, one mole molecule of any substance contains 6.022 �023 molecules, and one mole ion of any substance contains 6.022 �023 ions. Hence, the mass of a particular substance is fixed.

 The number 6.022 �1023 is an experimentally obtained value and is known asAvogadro’s number or Avogadro constant (represented by N o ). It is named after the Italian scientist, Amedeo Avogadro
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§ Mole concept – The word mole was introduced by Wilhelm Ostwald. In Latin, mole means heap or collection or pile.

- A mole is defined as the amount of a substance that contains as many particles (atoms, molecules or ions) of the substance as there are atoms in exactly 12 g of carbon-12.

- The number of particles present in a mole of any substance is fixed, with a value of 6.022 x 1023. This number is called Avogadro number or Avogadro constant, named in honour of the Italian scientist Amedeo Avogadro. It is represented by N0.

- In other words, a mole of a substance is that amount of the substance that contains 6.022 x 1023particles of the substance.

- Mole is the SI unit of amount of substance.

- The atomic mass of an element expressed in grams is called gram atomic mass of the element.

- The molecular mass of a substance expressed in grams is called gram molecular mass of the substance.

- Gram atomic mass or gram molecular mass also represents molar mass of the substance.

- The mass of 1 mole of a substance is called molar mass of the substance.

1 mole = 6.022 x 1023 particles = Gram atomic mass (or gram molecular mass)

§ Some important formulae –

(i.) n = m

M

(ii.) n = N

N0

(iii.) m = M x n

(iv.) m = M x N

N0

(v.) N = n x N0

(vi.) N = m x N0

M

n = number of moles

m = given mass

M = molar mass

N = given number of particles

N0 = Avogadro number

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