Some Basic Concepts of Chemistry — Chemistry STD 11 Science — Question
Maharashtra BoardEnglish MediumSTD 11 ScienceChemistrySome Basic Concepts of Chemistry4 Marks
Question
Explain Mole concept.
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Answer
Even a small amount of any substance contains very large number of atoms or molecules. Therefore, a quantitative adjective ‘mole’ is used to express the large number of sub-microscopic entities like atoms, molecules, ions, electrons, etc. present in a substance.
Thus, one mole is the amount of a substance that contains as many entities or particles as there are atoms in exactly $12\ g$ (or $0.012\ kg$) of the carbon $-12$ isotope.
One mole is the amount of substance which contains $6.0221367 \times 10^{23}$ particles/entities.
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