# Best answer: What do you understand by term 1 mole Class 9?

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Answer: One mole is defined as the amount of substance containing as many elementary entities (atoms, molecules, ions, electrons, radicals, etc.) as there are atoms in 12 grams of carbon-12 (6.023 x 1023). The mass of one mole of a substance equals its relative molecular mass expressed in grams. Also spelled as mole.

## What do you understand by term 1 mole?

A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

## What do you mean by 1 mole Class 9?

One mole of any species (atoms, molecules, ions or particles) is that quantity in number having a mass equal to its atomic or molecular mass in grams.

## What is mole Class 9 Ncert?

The word mole was coined by Wilhelm Ostwald from a Latin word moles meaning heap or piles. One mole of molecule or ion refers to the quantity in number possessing a mass equal to its atomic or molecular mass in grams. Number of particles present in one mole of any substance is 6.022 X 1023.

## What do you understand by the term mole class 11th?

A mole can be defined as the amount of substance that contains the same number of chemical entities (atoms, ions, molecules, etc.) … as there are in 12 g of Carbon-12 isotope, as defined by the General Conference on Weights and Measures.

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## What is a mole in chemistry GCSE?

The mole is the unit for amount of substance. It is abbreviated to mol. 1 mol is the amount of substance that contains the same number of particles as there are atoms in 12.0 g of carbon-12.

## What is the mass of 1 mole of water class 9?

Mass of one mole of water = 2 g/mol + 16 g/mol = 18 g/mol.

## What is mole ratio Class 11?

Hint: Mole ratios are the conversion factors which use the moles of the given substance to find the moles of the unknown substance involved in a chemical reaction.