![]() Please let us know how we can improve this web app. Related: Molecular weights of amino acids Weights of atoms and isotopes are from NIST article. Molar mass ( molar weight) is the mass of one mole of a substance and is expressed in g/mol.(1 u is equal to 1/12 the mass of one atom of carbon-12) There you can find the metals, semi-conductor (s), non-metal (s), inert noble gas (ses), Halogens, Lanthanoides. ![]() Please note that the elements do not show their natural relation towards each other as in the Periodic system. The most stable radioisotope is 67 Cu with a half-life of 61.83 hours, while the least stable is 54 Cu with a half-life of approximately 75 ns. Based on the atomic number, mass number, and neutron number of the element, three things can be considered. Therefore, a copper atom has thirty-five neutrons. The unity for atomic mass is gram per mol. Copper ( 29 Cu) has two stable isotopes, 63 Cu and 65 Cu, along with 27 radioisotopes. We know that the atomic number of copper is 29 and the atomic average mass number is about 64. Molecular mass ( molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). The lightest chemical element is Hydrogen and the heaviest is Hassium.To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.Įxamples of molecular weight computations:ĭefinitions of molecular mass, molecular weight, molar mass and molar weight Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.Ĭomputing molecular weight (molecular mass) Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg. ![]() Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al. Computing molar mass (molar weight)To calculate molar mass of a chemical compound enter its formula and click 'Compute'. ![]()
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