Atoms in 12 grams of 12C

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{"type":"standard","title":"HMS Venturer (P68)","displaytitle":"HMS Venturer (P68)","namespace":{"id":0,"text":""},"wikibase_item":"Q763350","titles":{"canonical":"HMS_Venturer_(P68)","normalized":"HMS Venturer (P68)","display":"HMS Venturer (P68)"},"pageid":8527055,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/HMS_Venturer_%28P68%29_%28IWM_FL_004031%29.jpg/330px-HMS_Venturer_%28P68%29_%28IWM_FL_004031%29.jpg","width":320,"height":233},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/a/a7/HMS_Venturer_%28P68%29_%28IWM_FL_004031%29.jpg","width":1042,"height":760},"lang":"en","dir":"ltr","revision":"1282845631","tid":"b2b9d4f8-0c2f-11f0-9396-6c745e8088c9","timestamp":"2025-03-28T23:52:25Z","description":"WWII V-class submarine operated by the Royal Navy","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/HMS_Venturer_(P68)","revisions":"https://en.wikipedia.org/wiki/HMS_Venturer_(P68)?action=history","edit":"https://en.wikipedia.org/wiki/HMS_Venturer_(P68)?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:HMS_Venturer_(P68)"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/HMS_Venturer_(P68)","revisions":"https://en.m.wikipedia.org/wiki/Special:History/HMS_Venturer_(P68)","edit":"https://en.m.wikipedia.org/wiki/HMS_Venturer_(P68)?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:HMS_Venturer_(P68)"}},"extract":"HMS Venturer was a Second World War British submarine of the V class that sank two German U-boats and five merchant ships during the war. Following the war, the boat was sold to Norway and was renamed HNoMS Utstein. She was scrapped in 1964.","extract_html":"

HMS Venturer was a Second World War British submarine of the V class that sank two German U-boats and five merchant ships during the war. Following the war, the boat was sold to Norway and was renamed HNoMS Utstein. She was scrapped in 1964.

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{"type":"standard","title":"Mole (unit)","displaytitle":"Mole (unit)","namespace":{"id":0,"text":""},"wikibase_item":"Q41509","titles":{"canonical":"Mole_(unit)","normalized":"Mole (unit)","display":"Mole (unit)"},"pageid":37400,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Mole_carbon-12_diagram.svg/330px-Mole_carbon-12_diagram.svg.png","width":320,"height":113},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Mole_carbon-12_diagram.svg/699px-Mole_carbon-12_diagram.svg.png","width":699,"height":246},"lang":"en","dir":"ltr","revision":"1284570055","tid":"b4c73378-147a-11f0-95ba-2003e43bcca0","timestamp":"2025-04-08T13:09:30Z","description":"SI unit of amount of substance","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Mole_(unit)","revisions":"https://en.wikipedia.org/wiki/Mole_(unit)?action=history","edit":"https://en.wikipedia.org/wiki/Mole_(unit)?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Mole_(unit)"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Mole_(unit)","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Mole_(unit)","edit":"https://en.m.wikipedia.org/wiki/Mole_(unit)?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Mole_(unit)"}},"extract":"The mole (symbol mol) is a unit of measurement, the base unit in the International System of Units (SI) for amount of substance, an SI base quantity proportional to the number of elementary entities of a substance. One mole is an aggregate of exactly 6.02214076×1023 elementary entities (approximately 602 sextillion or 602 billion times a trillion), which can be atoms, molecules, ions, ion pairs, or other particles. The number of particles in a mole is the Avogadro number (symbol N0) and the numerical value of the Avogadro constant (symbol NA) expressed in mol−1. The SI value of the mole was chosen on the basis of the historical definition of the mole as the amount of substance that corresponds to the number of atoms in 12 grams of 12C, which made the mass of a mole of a compound expressed in grams, numerically equal to the average molecular mass or formula mass of the compound expressed in daltons. With the 2019 revision of the SI, the numerical equivalence is now approximate.","extract_html":"

The mole (symbol mol) is a unit of measurement, the base unit in the International System of Units (SI) for amount of substance, an SI base quantity proportional to the number of elementary entities of a substance. One mole is an aggregate of exactly 6.02214076×1023 elementary entities (approximately 602 sextillion or 602 billion times a trillion), which can be atoms, molecules, ions, ion pairs, or other particles. The number of particles in a mole is the Avogadro number (symbol N0) and the numerical value of the Avogadro constant (symbol NA) expressed in mol−1. The SI value of the mole was chosen on the basis of the historical definition of the mole as the amount of substance that corresponds to the number of atoms in 12 grams of 12C, which made the mass of a mole of a compound expressed in grams, numerically equal to the average molecular mass or formula mass of the compound expressed in daltons. With the 2019 revision of the SI, the numerical equivalence is now approximate.

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