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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of RuRhTcMoPdKAgNbZrCdHgAuCaGeGaFlC99H9999OClFNeRnThLrAlMgMnNa is 14008.3891 g/mol

Convert between RuRhTcMoPdKAgNbZrCdHgAuCaGeGaFlC99H9999OClFNeRnThLrAlMgMnNa weight and moles
CompoundMolesWeight, g
RuRhTcMoPdKAgNbZrCdHgAuCaGeGaFlC99H9999OClFNeRnThLrAlMgMnNa

Elemental composition of RuRhTcMoPdKAgNbZrCdHgAuCaGeGaFlC99H9999OClFNeRnThLrAlMgMnNa
ElementSymbolAtomic weightAtomsMass percent
RutheniumRu101.0710.7215
RhodiumRh102.9055010.7346
TechnetiumTc96.90636510.6918
MolybdenumMo95.9610.6850
PalladiumPd106.4210.7597
PotassiumK39.098310.2791
SilverAg107.868210.7700
NiobiumNb92.9063810.6632
ZirconiumZr91.22410.6512
CadmiumCd112.41110.8025
MercuryHg200.5911.4319
GoldAu196.96656911.4061
CalciumCa40.07810.2861
GermaniumGe72.6410.5185
GalliumGa69.72310.4977
FleroviumFl289.187312.0644
CarbonC12.0107998.4882
HydrogenH1.00794999971.9454
OxygenO15.999410.1142
ChlorineCl35.45310.2531
FluorineF18.998403210.1356
NeonNe20.179710.1441
RadonRn210.99060111.5062
ThoriumTh232.0380611.6564
LawrenciumLr262.109611.8711
AluminumAl26.981538610.1926
MagnesiumMg24.305010.1735
ManganeseMn54.93804510.3922
SodiumNa22.9897692810.1641

Computing molar mass step by step

First, compute the number of each atom in RuRhTcMoPdKAgNbZrCdHgAuCaGeGaFlC99H9999OClFNeRnThLrAlMgMnNa:
Ru: 1, Rh: 1, Tc: 1, Mo: 1, Pd: 1, K: 1, Ag: 1, Nb: 1, Zr: 1, Cd: 1, Hg: 1, Au: 1, Ca: 1, Ge: 1, Ga: 1, Fl: 1, C: 99, H: 9999, O: 1, Cl: 1, F: 1, Ne: 1, Rn: 1, Th: 1, Lr: 1, Al: 1, Mg: 1, Mn: 1, Na: 1

Then, lookup atomic weights for each element in periodic table:
Ru: 101.07, Rh: 102.9055, Tc: 96.906365, Mo: 95.96, Pd: 106.42, K: 39.0983, Ag: 107.8682, Nb: 92.90638, Zr: 91.224, Cd: 112.411, Hg: 200.59, Au: 196.966569, Ca: 40.078, Ge: 72.64, Ga: 69.723, Fl: 289.18728, C: 12.0107, H: 1.00794, O: 15.9994, Cl: 35.453, F: 18.9984032, Ne: 20.1797, Rn: 210.990601, Th: 232.03806, Lr: 262.10963, Al: 26.9815386, Mg: 24.305, Mn: 54.938045, Na: 22.98976928

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (RuRhTcMoPdKAgNbZrCdHgAuCaGeGaFlC99H9999OClFNeRnThLrAlMgMnNa) = ∑ Counti * Weighti =
Count(Ru) * Weight(Ru) + Count(Rh) * Weight(Rh) + Count(Tc) * Weight(Tc) + Count(Mo) * Weight(Mo) + Count(Pd) * Weight(Pd) + Count(K) * Weight(K) + Count(Ag) * Weight(Ag) + Count(Nb) * Weight(Nb) + Count(Zr) * Weight(Zr) + Count(Cd) * Weight(Cd) + Count(Hg) * Weight(Hg) + Count(Au) * Weight(Au) + Count(Ca) * Weight(Ca) + Count(Ge) * Weight(Ge) + Count(Ga) * Weight(Ga) + Count(Fl) * Weight(Fl) + Count(C) * Weight(C) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(Cl) * Weight(Cl) + Count(F) * Weight(F) + Count(Ne) * Weight(Ne) + Count(Rn) * Weight(Rn) + Count(Th) * Weight(Th) + Count(Lr) * Weight(Lr) + Count(Al) * Weight(Al) + Count(Mg) * Weight(Mg) + Count(Mn) * Weight(Mn) + Count(Na) * Weight(Na) =
1 * 101.07 + 1 * 102.9055 + 1 * 96.906365 + 1 * 95.96 + 1 * 106.42 + 1 * 39.0983 + 1 * 107.8682 + 1 * 92.90638 + 1 * 91.224 + 1 * 112.411 + 1 * 200.59 + 1 * 196.966569 + 1 * 40.078 + 1 * 72.64 + 1 * 69.723 + 1 * 289.18728 + 99 * 12.0107 + 9999 * 1.00794 + 1 * 15.9994 + 1 * 35.453 + 1 * 18.9984032 + 1 * 20.1797 + 1 * 210.990601 + 1 * 232.03806 + 1 * 262.10963 + 1 * 26.9815386 + 1 * 24.305 + 1 * 54.938045 + 1 * 22.98976928 =
14008.3891 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C99H9999AgAlAuCaCdClFFlGaGeHgKLrMgMnMoNaNbNeOPdRhRnRuTcThZr

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, T, Ph, Me, Et, Bu, AcAc, For, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
  • parenthesis () or brackets [].
  • Common compound names.
Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, nitric acid, potassium permanganate, ethanol, fructose, caffeine, water.

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

  • 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.
  • Mole is a standard scientific unit for measuring large quantities of very small entities such as atoms and molecules. One mole contains exactly 6.022 ×1023 particles (Avogadro's number)

Steps to calculate molar mass

  1. Identify the compound: write down the chemical formula of the compound. For example, water is H2O, meaning it contains two hydrogen atoms and one oxygen atom.
  2. Find atomic masses: look up the atomic masses of each element present in the compound. The atomic mass is usually found on the periodic table and is given in atomic mass units (amu).
  3. Calculate molar mass of each element: multiply the atomic mass of each element by the number of atoms of that element in the compound.
  4. Add them together: add the results from step 3 to get the total molar mass of the compound.

Example: calculating molar mass

Let's calculate the molar mass of carbon dioxide (CO2):

  • Carbon (C) has an atomic mass of about 12.01 amu.
  • Oxygen (O) has an atomic mass of about 16.00 amu.
  • CO2 has one carbon atom and two oxygen atoms.
  • The molar mass of carbon dioxide is 12.01 + (2 × 16.00) = 44.01 g/mol.

Lesson on computing molar mass

Weights of atoms and isotopes are from NIST article.

Related: Molecular weights of amino acids

molecular weights calculated today
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