Question

what is mole concept? plz explain it in an easy way to understand.

Answer 1

Hi friend ,
 Definition (In terms of mass)A mole is defined a the amount of the substance which has mass equal  to gram atomic mass if the substance is atomic or gram molecular mass if the substance is molecular.
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e.g. 1 mole of carbon atoms = 12 g (∵ At. mass of C = 12u)
Mole concept is based on mole number , molarity ,Avogadro's number(constant)
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No. of moles- 1 mole= 1 molecule = 6.022 x $10^{-23}$ atoms.
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Definition(In terms of number)- A mole is defined as that amount  of the substance which contains Avogadro's number ( 6.022 x $10^{-23} [/tex) of atoms if the substance  is atomic  or Avogadro's number (6.022 x [tex] 10^{-23}$) of moleculer if the substance is molecular.
e.g. 1 mole of carbon atoms = 6.022 x $10^{-23}$ atoms of carbon.
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Definition ( In terms of volume)- In case of gases. a mole is defined as that amount of the gas which has a volume of 22.4 litre as STP.
e.g. 1 mole of oxygen gas = 22.4 litres of oxygen at STP.
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A mole of an ionic compound  is defined as that amount of the substance which has mass equal to gram formula mass (i.e. formula mass expressed in grams) or which contains Avogadro's number (6.022 x $10^{-23}$ ) of formula units.
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                                                                              hope you like it ;)

Answer 2

Hi Deepak !!!

1 mole is defined as the number of particles present in Avogadro no: of particles.

1 mole of any substance has 6.022 × 10²³ particles.

The particles can be anything - it can be molecules , ions, or atoms


1 mole of any substance has 6.022× 10²³ atoms

1 mole of any substance has 6.022× 10²³ molecules

1 mole of any substance has 6.022× 10²³ ions