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the population mean or expected value in probability and statistics; a measure in measure theory; micro-, an SI prefix denoting 10 −6 (one millionth) Micrometre or micron (retired in 1967 as a standalone symbol, replaced by "μm" using the standard SI meaning) the coefficient of friction in physics; the service rate in queueing theory
the number density of particles in a volume; the index of the nth term of a sequence or series (e.g. t n = a + (n − 1)d) the principal quantum number [10] the amount of a given substance [10] the number concentration [10] the overall order of reaction [10] Refractive index of a material; Spherical Bessel function of the second kind (uncommon ...
u+2374 ⍴ apl functional symbol rho; u+2627 ☧ chi rho; u+2ca2 Ⲣ coptic capital letter ro; u+2ca3 ⲣ coptic small letter ro; u+2ce5 ⳥ coptic symbol mi ro; u+2ce6 ⳦ coptic symbol pi ro; u+2ce8 ⳨ coptic symbol tau ro; u+2ce9 ⳩ coptic symbol khi ro; u+101a0 Ơ greek symbol tau rho; these characters are used only as mathematical symbols.
Quantities, Units and Symbols in Physical Chemistry, also known as the Green Book, is a compilation of terms and symbols widely used in the field of physical chemistry. It also includes a table of physical constants , tables listing the properties of elementary particles , chemical elements , and nuclides , and information about conversion ...
The interest stems from that accurate measurements of the unit cell volume, atomic weight and mass density of a pure crystalline solid provide a direct determination of the Avogadro constant. [3] The CODATA recommended value for the molar volume of silicon is 1.205 883 199 (60) × 10 −5 m 3 ⋅mol −1, with a relative standard uncertainty of ...
In chemistry, the mass concentration ρ i (or γ i) is defined as the mass of a constituent m i divided by the volume of the mixture V. [1]= For a pure chemical the mass concentration equals its density (mass divided by volume); thus the mass concentration of a component in a mixture can be called the density of a component in a mixture.
For a substance X with a specific volume of 0.657 cm 3 /g and a substance Y with a specific volume 0.374 cm 3 /g, the density of each substance can be found by taking the inverse of the specific volume; therefore, substance X has a density of 1.522 g/cm 3 and substance Y has a density of 2.673 g/cm 3. With this information, the specific ...
Usually the symbol for the quantity with a subscript of some reference to the quantity is used, or the quantity is written with the reference to the chemical in round brackets. For example, the mass of water might be written in subscripts as m H 2 O , m water , m aq , m w (if clear from context) etc., or simply as m (H 2 O).