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Using his extensive measurements of the properties of gases, [6] [7] Mendeleev also calculated it with high precision, within 0.3% of its modern value. [ 8 ] The gas constant occurs in the ideal gas law: P V = n R T = m R s p e c i f i c T {\displaystyle PV=nRT=mR_{\rm {specific}}T} where P is the absolute pressure , V is the volume of gas, n ...
The analytical (total) concentration of a reactant R at the i th titration point is given by = + [] + where R 0 is the initial amount of R in the titration vessel, v 0 is the initial volume, [R] is the concentration of R in the burette and v i is the volume added. The burette concentration of a reactant not present in the burette is taken to be ...
We will employ the ideal gas law to solve for the volume at 0 °C (273.15 K) and 1 atmosphere using the gas law constant of R = 0.08206 L·atm·K −1 ·mol −1:
Van der Waals wrote this relation, but did not make use of it initially. [92] However, it has been used frequently in subsequent studies, and its use is said to produce good agreement with experimental results at high pressure. [93]
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Using an approach similar to the one he used for the case k = 3, Roth [4] gave a second proof for k = 4 in 1972. The general case was settled in 1975, also by Szemerédi, [ 5 ] who developed an ingenious and complicated extension of his previous combinatorial argument for k = 4 (called "a masterpiece of combinatorial reasoning" by Erdős [ 6 ] ).
The Vickers Wellington (nicknamed the Wimpy) is a British twin-engined, long-range medium bomber.It was designed during the mid-1930s at Brooklands in Weybridge, Surrey.Led by Vickers-Armstrongs' chief designer Rex Pierson, a key feature of the aircraft is its geodetic airframe fuselage structure, which was principally designed by Barnes Wallis.
The Madeira firecrest is a small plump bird, of 9–10 cm (3.5–3.9 in) length and weighing about 5 g (0.18 oz). It has bright olive-green upperparts with a bronze-coloured patch on each shoulder, and whitish underparts washed with brownish grey on the breast and flanks.