(m)H2O
 Enter a chemical formula to calculate its molar mass & elemental composition: Molar mass of (m)H2O is 18.01528 ± 0.00044 g/mol Convert between (m)H2O weight & molesCompoundMolesWeight, g
Elemental composition of (m)H2OElementSymbolAtomic weightAtomsMass percent
 Hydrogen H 1.00794 2 11.1898 Oxygen O 15.9994 1 88.8102
Mass percent compositionAtomic percent composition

Formula in Hill system is H2O

### Computing molar mass (molar weight)

To calculate molar mass of a chemical compound enter its formula và click "Compute". In chemical formula you may use:Any chemical element. Capitalize the first letter in chemical symbol và use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmgparantesis () or brackets <>.Common compound names.Examples of molar mass computations: NaCl, Ca(OH)2, K4,CuSO4*5H2O,water,nitric acid,potassium permanganate,ethanol,fructose.

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Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows lớn convert from weight to lớn number of moles and vice versa.

### 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: C<14>O<16>2, S<34>O<16>2.

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### Definitions of molecular mass, molecular weight, molar mass and molar weight

Molecular mass (molecular weight) is the mass of one molecule of a substance và is expressed in the unified atomic mass units (u). (1 u is equal lớn 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance & is expressed in g/mol.Weights of atoms & isotopes are from NIST article.Related: Molecular weights of amino acidsmolecular weights calculated today Please let us know how we can improve this web app.
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