Flask (unit)
{{Short description|Unit of mass used for mercury}}
Flask is a British unit of mass or weight in the avoirdupois system, used to measure mercury.{{Cite book|title = Encyclopaedia of Scientific Units, Weights and Measures. Their SI Equivalences and Origins.|last = Cardarelli|first = F.|publisher = Springer|year = 2003|isbn = 978-1-4471-1122-1|location = London|pages = 37}}{{Cite web|url=https://periodictable.com/Items/080.6/index.html|title=Nearly full flask, a sample of the element Mercury in the Periodic Table|website=periodictable.com|access-date=2019-05-18}}{{Cite web|url=https://www.thefreedictionary.com/injection+flask|title=injection flask|website=TheFreeDictionary.com|access-date=2019-05-18}}{{Cite book|url=https://books.google.com/books?id=XFE1AAAAIAAJ&pg=PA35|title=Geological Survey Bulletin|date=1983|publisher=U.S. Department of the Interior, Geological Survey; Washington, D.C.|language=en}}{{Cite patent|title=Stackable mercury flask|country=US|number=3587904|pubdate=1971-06-28|inventor1-last=Harris|inventor1-first=George W.|inventor2-last=Good|inventor2-first=Elmer H.}} It is defined as {{convert|76|lb}}. Near room temperature, a flask of mercury occupies a volume of approximately {{convert|2.5451|L|usoz impoz|sigfig=5}}.At 20°C/ 68°F listed density of 13545 kg/m3 = 13.545 kg/L (14.1298 oz/fl oz (US))