Question

anyone explain the MOLE CONCEPT class 9 and state its important formulas............​

Answer 1

HEY ✌

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One mole is the number of particles equal to 6.022 into 10 raised to 23 which is present in 12 grams of C12 atom.

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NUMBER OF MOLES

= given mass/molar mass

= volume/22.4 dm. cube

= number of particles, atoms,

ions/6.022*10 raised to 23

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HOPE IT HELPS..✌

MARK AS BRAINLIEST....☺

Answer 2

Well firstly we must know what a mole is.

Mole :

A mole of a substance is that amount of the substance which contains the same number of entities as there are atoms in exactly 12 gram of pure carbon - 12 .

12 gram of carbon -12 is found to contain 6.022 × 10^23 particles.

And this 6.022 × 10^23 is known as Avogadro Constant.

(Avogadro constant is named in honour of a Italian scientist - Amedeo Avogadro)

Mole in Term of Mass :

1 mole of a substance is thequantity of that substance equal to its molecular mass expressed in grams.

1 mole of oxygen molecule = 32 g

(Molecular mass of oxygen = 32 u)

Molar Mass :

Molar mass is the mass in grams of one mole of a substance.

Molar Mass of Carbon dioxide = 44 g/mol

Then ,

How many molecules are present in the specific mass of a substance?

$number \: of \: moles \\ = \frac{mass \: of \: the \: substance}{molecular \: mass \: of \: that \: substance}$

What is Molar Volume :

One mole of any gaseous substance at one atmospheric pressure and 273 Kelvin temperature occupies a volume of 22.4 litres. This is called molar volume.