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Helium is a colorless, odorless, non-toxic, inert gas and the first in the noble gas group. Its standard atomic weight is 4.002 602 ± 0.000 002, and its most common isotope is helium-4, formed by nuclear fusion and radioactive decay.
Find the molecular weight of helium (He) and other chemical properties from the NIST Standard Reference Database. The molecular weight of helium is 4.002602, according to the IUPAC Standard InChI.
Enter a chemical formula to calculate its molar mass and elemental composition. Helium molar mass is 4.0026020 g/mol and its elemental composition is 100% He.
Find the molar mass of helium in grams per mole and learn how to calculate it from the atomic mass of each element. Also, explore the percentage composition by element and the formula weight of helium.
Element Helium (He), Group 18, Atomic Number 2, s-block, Mass 4.003. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Molar Mass of Different Gases. Molar mass is the mass of one mole of a substance, and it is a useful property for calculating the amount of substance present in a given sample. The following table provides a comprehensive list of molar mass values for different gases. References: 1) Cardarelli, François.
Calculate the molar mass and number of moles of any gas using the ideal gas law formula. Enter the pressure, temperature, volume, and mass of the gas and get the result in g/mol or other units.
