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Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. [1] For use in broader applications, it is defined as amount of substance of solute per unit volume of solution, or per unit volume available to the species, represented by lowercase : [2]
The litre (Commonwealth spelling) or liter (American spelling) (SI symbols L and l, [1] other symbol used: ℓ) is a metric unit of volume. It is equal to 1 cubic decimetre (dm 3 ), 1000 cubic centimetres (cm 3 ) or 0.001 cubic metres (m 3 ).
1.242 L: 42 US fl oz-1 ⁄ 3 US gallon. Mostly replaced by the 40 US fl oz bottle by the late 1980s. medium pitcher (US) 1.41 L: 48 US fl oz: 3 US pints. The 48 oz pitcher is used with either medium 12 oz beer glasses (4 glasses per pitcher) or large 16 oz beer glasses (3 glasses per pitcher). Yard of Ale (UK) 1.42 L: 48.03 US fl oz: 50 imp. oz ...
The statohm is a unit of electric resistance equal to 1 statV/statA, corresponding to ~ 898.755 1787 GΩ. The statsiemens or statmho is a unit of electric conductance equal to 1 statA/statV, corresponding to ~ 1.112 646 pS. [6] The stathenry is a unit of electric inductance equal to 1 statV·s/statA, corresponding to ~ 898.755 1787 GH. [7] [6] [a]
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity.
The chart below [6] lists the sizes of various wine bottles in multiples relating to a standard bottle of wine, which is 0.75 litres (0.20 US gal; 0.16 imp gal) (six 125 mL servings). The "wineglassful"—an official unit of the apothecaries' system of weights —is much smaller at 2.5 imp fl oz (71 mL ).
A significant characteristic of the metric system is its use of decimal multiples – powers of 10. For example, a length that is significantly longer or shorter than 1 metre can be represented in units that are a power of 10 or 1000 metres. This differs from many older systems in which the ratio of different units varied.
Prior to the adoption of the unit of the minim in the early 19th century, the smallest unit of fluid measure in the Apothecaries' systems of the United States customary units and pre-1824 English units was, while inexact, presumed to be equal to 1 / 60 of a fluid dram or 1 / 480 of a fluid ounce.