Molar Mass, Molecular Weight and Elemental Composition Calculator
Molar mass of water is 18.01528 ± 0.00044 g/mol
Compound name is water
Formula in Hill system is H2O
Elemental composition of H2O:
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Computing molar mass (molar weight)To calculate molar mass of a chemical compound enter its formula and click 'Calculate!'. In chemical formula you may use:
Examples of molar mass computations:
- Any chemical element
- Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
- parantesis () or brackets .
- Common compound names.
Computing molecular weight (molecular mass)
To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.
Examples of molecular weight computations:
Definitions of molecular mass, molecular weight, molar mass and molar weight
Weights of atoms and isotopes are from NIST article.
- Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
- Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Related: Molecular weights of amino acids
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