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Ideal gas law - Wikipedia The chemical amount, n (in moles), is equal to total mass of the gas (m) (in kilograms) divided by the molar mass, M (in kilograms per mole): By replacing n with m M and subsequently introducing density ρ = m V, we get: Defining the specific gas constant Rspecific as the ratio R M,
Barometric formula - Wikipedia g 0 {\displaystyle g_ {0}} = gravitational acceleration: 32 17405 ft s 2 M {\displaystyle M} = mean molar mass of Earth's air: 28 9644 lb lb‑mol (both lbs are pound-mass, not pound-force) The value of subscript b ranges from 0 to 6 in accordance with each of seven successive layers of the atmosphere shown in the table below
Gas constant - Wikipedia Just as the molar gas constant can be related to the Boltzmann constant, so can the specific gas constant by dividing the Boltzmann constant by the molecular mass of the gas: R specific = k B m {\displaystyle R_ {\text {specific}}= {\frac {k_ {\text {B}}} {m}} } Another important relationship comes from thermodynamics
Molar mass - Wikipedia In chemistry, the molar mass (M) (sometimes called molecular weight or formula weight, but see related quantities for usage) of a chemical substance (element or compound) is defined as the ratio between the mass (m) and the amount of substance (n, measured in moles) of any sample of the substance: M = m n [1] The molar mass is a bulk, not molecular, property of a substance The molar mass is
Density of air - Wikipedia The density of air or atmospheric density, denoted ρ, [note 1] is the mass per unit volume of Earth's atmosphere at a given point and time Air density, like air pressure, decreases with increasing altitude
Avogadros law - Wikipedia Thus, the number of molecules or atoms in a specific volume of ideal gas is independent of their size or the molar mass of the gas Relationships between Boyle's, Charles's, Gay-Lussac's, Avogadro's, combined and ideal gas laws, with the Boltzmann constant k = R N A = n R N (in each law, properties circled are variable and
Grahams law - Wikipedia It is only approximate for diffusion of one gas in another or in air, as these processes involve the movement of more than one gas [2] In the same conditions of temperature and pressure, the molar mass is proportional to the mass density
Molecular mass - Wikipedia The molar mass is defined as the mass of a given substance divided by the amount of the substance, and is expressed in grams per mole (g mol) That makes the molar mass an average of many particles or molecules (weighted by abundance of the isotopes), and the molecular mass the mass of one specific particle or molecule