SI Units

मोल

परिभाषा

पदार्थ की मात्रा की SI मूल इकाई, ठीक 6.02214076×10²³ प्राथमिक इकाइयों (परमाणु, अणु, आयन आदि) के रूप में परिभाषित।

व्याख्या

One mole of carbon-12 atoms has a mass of exactly 12 grams. The number 6.02214076×10²³ is Avogadro's number, fixed by the 2019 SI redefinition. A mole of water molecules (18 g) fits in about 18 mL — a tablespoon. Chemists use moles because atoms are too small to count individually, but a mole provides a practical laboratory-scale quantity.

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