Root mean square speed is a measure of the velocity of particles in a gas. It says that where vrms is the root mean square speed and Mm is the molar mass of the molecule, R is the Molar gas constant T is the temperature. This works well for ideal gases like Helium but not for molecular gases like Oxygen. This is because some of their internal energy is in the spin of the molecule. In mathematics, the root mean square or rms is a statistical measure of the magnitude of a varying quantity. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... In general, a molecule is the smallest particle of a pure chemical substance that still retains its composition and chemical properties. ... Molar gas constant (also known as universal gas constant, usually denoted by symbol R) is the constant occurring in the universal gas equation, i. ... Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ... An ideal gas or perfect gas is a hypothetical gas consisting of identical particles of negligible volume, with no intermolecular forces. ... General Name, Symbol, Number helium, He, 2 Chemical series noble gases Group, Period, Block 18, 1, s Appearance colorless Atomic mass 4. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ...
In mathematics, rootmeansquare (abbreviated RMS or rms), also known as the quadratic mean, is a statistical measure of the magnitude of a varying quantity.
The name comes from the fact that it is the squareroot of the mean of the squares of the values.
In chemistry, the rootmeansquare velocity is defined as the squareroot of the average velocity-squared of the molecules in a gas.
where vrms is the 
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