Compositional formula

Mineral CAS Registry Number Composition formula B2O2, wt %... 

An example of a novolac formula is presented in Table 8. A resin of this type might be used to manufacture electronics composites. Formulae for other applications might show considerable differences in molar ratio, monomer choice. 

Calculated within the procedure Passed back to the calling procedure. (Pigment pinder ratio) Composite formula values (Solids, Cost) calculated from row data, concentration. 

As in the other fields of inorganic chemistry, simple compositional formulae are often used for intermetallic phases these, for instance, Mg2Ge, ThCr2Si2, etc., are useful as quick references, especially for simple, stoichiometric, compounds. The following remarks may be noteworthy. 

According to Jensen, the dimensionality of a structure (or of a substructure of the same) is indicated by enclosing its compositional formula in square brackets and prefixing an appropriate symbol. ... 

Several ternary phases are known, often homogeneous in more or less large ranges of compositions formulae such as —MeAlgTg, —MeAl8T4 (Me = lanthanides, actinides, T = Mn, Cr, Fe) are frequently found and also several isostruc-tural phases with Ga instead of Al. According to the systematic presentation and classification of intermetallic phases presented by Parthe and Chabot (1984), some... 

If F is a composite formula, we define functions which extend the values of the terms to the formula. 

The simplest kind of formula is a compositional formula or empirical formula, which lists the constituent elements in the atomic proportions in which they are present in the compound. For such a formula to be useful in lists or indexes, an order of citation of symbols (hierarchy) must be agreed. Such hierarchies, often designated seniorities or priorities, are commonly used in nomenclature. For lists and indexes, the order is now generally recommended to be the alphabetical order of symbols, with one very important exception. Because carbon and hydrogen are always present in organic compounds, C is always cited first, H second and then the rest, in alphabetical order. In non-carbon-containing compounds, strict alphabetical order is adhered to. 

Formulae and names. Polynuclear inoiganic complexes may be so complex as to make accurate structure-based formulae and names too complicated to be useful. Compositional formulae and names may be adequate. These are discussed briefly first. 

Of these 171, nicknamed by the Navy "six-six-six" is of unusual compn because it contains cuprous oxide as one of the oxidizers. It is used for igniting phosphorus candles in "Drift and Float Signals" contg Red P 51, Mn02 35, Mg 8, ZnO 3 linseed oil 3% (Formula 41 of Ref 57). Formula 172, which contains cupric oxide, is claimed to exceed the "six-six-six" in calorific output. It has been used by the Navy in the "Mk25Mod2 Starter Composition Formula 172 was developed by W. Ripley at NAD (Naval Ammunition Depot), Crane, Indiana... 

You ve now also determined the total mass of each element present in the formula. Now all you need to do is plug each element s value into the percent composition formula and solve ... 

Similar calculations can be carried out on mixed explosives and on propellants if the composite formula is known for the materials. The use of the water-gas equilibrium will produce a result that is a closer approximation to the experimentally-derived figure than the Kistiakowsky-Wilson and the Springall Roberts approaches. 

Rationalization of homologous series of oxygen-deficient fluorite-related lanthanide higher oxides and their compositional formula... 

If any phases of the lanthanide higher oxides are assembled by stacking the thirteen fluorite-type modules, then the composition of the oxide should have the compositional formula as follows ... 

Groups of atoms of certain elements combine in a rather stable state, making up ionic compounds. An example is CaC03, the compositional formula of limestone, composed of Ca2+ + CO2-. A second example is CaS04, the compositional formula of anhydrite, composed of Ca2+ + S04. ... 

Tg of poly( 1,4 phenylene terephthaloyl) has been reported as 540 K (41). All of the points could not be fitted by the general Tg/composition formula by Wood (27), even when the Tg of poly (oxy terephthaloyl) was allowed to float. If the point for 3IGT was omitted, the rest of the points were fitted by the Fox equation (40), shown as a dashed line in Figure 12. 

The composition of the Executive Council caused a major headache in 1992. There were concerns among a number of negotiators and future States Parties that, based on the composition formula that was being developed, they would not receive a reasonable opportunity to participate in the deliberations of the Executive Council. However, as a result of the liberal use of Executive Council Rule of Procedure 22, any State Party can actively participate in the various issues being considered by the Executive Council, including the presentation of national papers, which has resulted in a reasonably high level of satisfaction with the operation of the Executive Council. ... 

Formula, CH4.—The analysis of methane shows that it contains approximately 75 per cent carbon and 25 per cent hydrogen. This together with the facts in regard to its density and molecular weight give us the data for the calculation of the composition formula for the compound which has been established as CH4, i.e., one atom of carbon and four atoms of hydrogen. The reaction with oxygen may be written therefore as ... 

Di-saccharoses or Hexo-bioses.—(i) The first group is known as di-saccharoses. These are so called because they split, on hydrolysis, into two molecules of hexose mono-saccharoses. The general formula for these di-saccharoses is C H2 20n-i, and the known members all have the composition formula C12H22O11. They are represented by such common substances as cane sugar, milk sugar and malt sugar. The reaction of hydrolysis is,... 

Isatin, Indole, etc.—By oxidation indigo yields isatin which by successive reductions as recently explained yields di-oxindole, oxindole and finally indole. Also indoxyl, the isomer of oxindole, yields indigo by oxidation. The composition formulas of indigo and these last compounds are as follows ... 

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