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Formulae

Formula For"mu*la, n.; pl. E. Formulas, L. Formul[ae]. [L., dim. of forma form, model. SeeForm, n.] 1. A prescribed or set form; an established rule; a fixed or conventional method in which anything is to be done, arranged, or said. 2. (Eccl.) A written confession of faith; a formal statement of foctrines. 3. (Math.) A rule or principle expressed in algebraic language; as, the binominal formula. 4. (Med.) A prescription or recipe for the preparation of a medicinal compound. 5. (Chem.) A symbolic expression (by means of letters, figures, etc.) of the constituents or constitution of a compound. Note: Chemical formul[ae] consist of the abbreviations of the names of the elements, with a small figure at the lower right hand, to denote the number of atoms of each element contained. Empirical formula (Chem.), an expression which gives the simple proportion of the constituents; as, the empirical formula of acetic acid is C2H4O2. Graphic formula, Rational formula (Chem.), an expression of the constitution, and in a limited sense of the structure, of a compound, by the grouping of its atoms or radicals; as, a rational formula of acetic acid is CH3.(C:O).OH; -- called also structural formula, constitutional formula, etc. See also the formula of Benzene nucleus, under Benzene. Molecular formula (Chem.), a formula indicating the supposed molecular constitution of a compound.

Formula For"mu*la, n.; pl. E. Formulas, L. Formul[ae]. [L., dim. of forma form, model. SeeForm, n.] 1. A prescribed or set form; an established rule; a fixed or conventional method in which anything is to be done, arranged, or said. 2. (Eccl.) A written confession of faith; a formal statement of foctrines. 3. (Math.) A rule or principle expressed in algebraic language; as, the binominal formula. 4. (Med.) A prescription or recipe for the preparation of a medicinal compound. 5. (Chem.) A symbolic expression (by means of letters, figures, etc.) of the constituents or constitution of a compound. Note: Chemical formul[ae] consist of the abbreviations of the names of the elements, with a small figure at the lower right hand, to denote the number of atoms of each element contained. Empirical formula (Chem.), an expression which gives the simple proportion of the constituents; as, the empirical formula of acetic acid is C2H4O2. Graphic formula, Rational formula (Chem.), an expression of the constitution, and in a limited sense of the structure, of a compound, by the grouping of its atoms or radicals; as, a rational formula of acetic acid is CH3.(C:O).OH; -- called also structural formula, constitutional formula, etc. See also the formula of Benzene nucleus, under Benzene. Molecular formula (Chem.), a formula indicating the supposed molecular constitution of a compound.

- than chemical names and structural formulae. The simplest types of chemical formulae are called empirical formulae, which use letters and numbers indicating...

- English plural noun form) or, under the influence of scientific Latin, formulae (from the original Latin). In mathematics, a formula generally refers to...

- These are also known as reduction formulae. These are also known as the angle addition and subtraction theorems (or formulae). sin ( α + β ) = sin α cos...

- This is a list of common chemical compounds with chemical formulae and CAS numbers, indexed by formula. This complements alternative listing at list of...

- In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities (in that they have...

- The following is a list of significant formulae involving the mathematical constant π. Many of these formulae can be found in the article Pi, or the article...

- sometimes termed Kekulé structures or Lewis-Kekulé structures. Skeletal formulae have become ubiquitous in organic chemistry, partly because they are relatively...

- of its post-World War II single-seater regulations, or formulae. The best known of these formulae are Formula One, Formula E, Formula Two, Formula Three...

- This is a list of some vector calculus formulae for working with common curvilinear coordinate systems. This article uses the standard notation ISO 80000-2...

- This is a collection of temperature conversion formulas and comparisons among eight different temperature scales, several of which have long been obsolete...

- English plural noun form) or, under the influence of scientific Latin, formulae (from the original Latin). In mathematics, a formula generally refers to...

- These are also known as reduction formulae. These are also known as the angle addition and subtraction theorems (or formulae). sin ( α + β ) = sin α cos...

- This is a list of common chemical compounds with chemical formulae and CAS numbers, indexed by formula. This complements alternative listing at list of...

- In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities (in that they have...

- The following is a list of significant formulae involving the mathematical constant π. Many of these formulae can be found in the article Pi, or the article...

- sometimes termed Kekulé structures or Lewis-Kekulé structures. Skeletal formulae have become ubiquitous in organic chemistry, partly because they are relatively...

- of its post-World War II single-seater regulations, or formulae. The best known of these formulae are Formula One, Formula E, Formula Two, Formula Three...

- This is a list of some vector calculus formulae for working with common curvilinear coordinate systems. This article uses the standard notation ISO 80000-2...

- This is a collection of temperature conversion formulas and comparisons among eight different temperature scales, several of which have long been obsolete...

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