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The cup is a cooking measure of volume, commonly associated with cooking and serving sizes.In the US, it is traditionally equal to one-half US pint (236.6 ml). Because actual drinking cups may differ greatly from the size of this unit, standard measuring cups may be used, with a metric cup commonly being rounded up to 240 millilitres (legal cup), but 250 ml is also used depending on the ...
tablespoonful = about 1/2 fl oz; dessertspoonful = about 2 fl dr; teaspoonful = about 1 fl dr; drop = about minim; teacupful (5 fl oz, or 1 gill ibid) wineglassful (2-1/2 fl oz or 1/2 gill or 1/2 teacupful or 1/4 tumblerful) dessertspoonful (1/4 fl oz or 2 fl dr and equal to 2 teaspoonful or 1/2 tablespoonful)
The scruple, like in Venice but unlike in the rest of the Romance region, was divided into 20 grains. The existence of a unit called aureo, the equivalent of 1 + 1 ⁄ 2 dramme, is interesting because 6 aurei were 9 dramme. In the original Salerno weight system an ounce was divided into 9 drachms, and so an aureo would have been 1 ⁄ 6 of an ...
Formation of hydrogen peroxide from oxygen O 2 + 4H + + 4e − → 2H 2 O +0.82 In classical electrochemistry, E° for O 2 = +1.23 V with respect to the standard hydrogen electrode (SHE). At pH = 7, E red = 1.23 – 0.059 V × 7 = +0.82 V: P680 + + e − → P680 ~ +1.0 Half-reaction independent of pH as no H + is involved in the reaction
Prior to metrication in the United Kingdom, the standard single measure of spirits in a pub was 1 ⁄ 6 gill (23.7 mL) in England, either 1 ⁄ 5 gill (28.4 mL) or 1 ⁄ 4 gill (35.5 mL) in Scotland, and 1 ⁄ 4 gill (35.5 mL) in Northern Ireland. After metrication, this was replaced by measures of either 25 or 35 millilitres (0.176 or 0.246 gi ...
For example, in the reaction CH 4 + 2 O 2 → CO 2 + 2 H 2 O, the stoichiometric number of CH 4 is −1, the stoichiometric number of O 2 is −2, for CO 2 it would be +1 and for H 2 O it is +2. In more technically precise terms, the stoichiometric number in a chemical reaction system of the i -th component is defined as
Dissolved oxygen levels required by various species in the Chesapeake Bay (US). In aquatic environments, oxygen saturation is a ratio of the concentration of "dissolved oxygen" (DO, O 2), to the maximum amount of oxygen that will dissolve in that water body, at the temperature and pressure which constitute stable equilibrium conditions.
One langmuir corresponds to an exposure of 10 −6 Torr during one second. [1] [2] For example, exposing a surface to a gas pressure of 10 −8 Torr for 100 seconds corresponds to 1 L. Similarly, keeping the pressure of oxygen gas at 2.5·10 −6 Torr for 40 seconds will give a dose of 100 L.
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