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Molar Mass, Molecular Weight and Elemental Composition Calculator


Molar mass of KIO3 is 214.0010 g/mol
Compound name is potassium iodate

Convert between KIO3 weight and moles
CompoundMolesWeight, g
KIO3

Elemental composition of KIO3
ElementSymbolAtomic weightAtomsMass percent
PotassiumK39.0983118.2702
IodineI126.90447159.3009
OxygenO15.9994322.4290

Mass percent compositionAtomic percent composition

Sample reactions for KIO3
EquationReaction type
BaCl2 + KIO3 = Ba(IO3)2 + KCldouble replacement
KIO3 = KI + O2decomposition
KIO3 + AgNO3 = KNO3 + AgIO3double replacement
KIO3 + H2SO3 = KI + H2SO4double replacement
Sr(NO3)2 + KIO3 = Sr(IO3)2 + KNO3double replacement

Formula in Hill system is IKO3

Computing molar mass (molar weight)

To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:
  • Any chemical element. 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.
  • Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
  • parantesis () or brackets [].
  • Common compound names.
Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, water, nitric acid, potassium permanganate, ethanol, fructose.

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.

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.

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

  • 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.
Weights of atoms and isotopes are from NIST article.

Related: Molecular weights of amino acids
molecular weights calculated today
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