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Molar Mass, Molecular Weight and Elemental Composition Calculator


Molar mass of Ni(OH)2 is 92.7081 g/mol Copy to clipboard
Compound name is nickel(ii) hydroxide

Convert between Ni(OH)2 weight and moles
CompoundMolesWeight, g
Ni(OH)2Copy to clipboardCopy to clipboard

Elemental composition of Ni(OH)2
ElementSymbolAtomic weightAtomsMass percent
NickelNi58.6934163.3099
OxygenO15.9994234.5157
HydrogenH1.0079422.1744

Mass percent compositionAtomic percent composition

Sample reactions for Ni(OH)2
EquationReaction type
Ni(OH)2 + H2SO4 = NiSO4 + H2Odouble replacement
Ni(OH)2 = NiO + H2Odecomposition
Fe + Ni(OH)2 = Ni + Fe(OH)3single replacement
Ni(OH)2 + HCl = NiCl2 + H2Odouble replacement

Formula in Hill system is H2NiO2

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.

Give us feedback about your experience with Molecular Weight Calculator.

Related: Molecular weights of amino acids
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