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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcFCm is 3652.7414 g/mol

Convert between WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcFCm weight and moles
CompoundMolesWeight, g
WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcFCm

Elemental composition of WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcFCm
ElementSymbolAtomic weightAtomsMass percent
TungstenW183.8415.0329
CarbonC12.010751.6441
GoldAu196.96656915.3923
OganessonOg0.000000010.0000
LivermoriumLv0.000000010.0000
AluminumAl26.981538610.7387
NitrogenN14.006720.7669
IodineI126.9044726.9485
LithiumLi6.94110.1900
ChlorineCl35.45321.9412
HydrogenH1.0079410.0276
FranciumFr223.01973616.1055
FleroviumFl289.187317.9170
FluorineF18.998403231.5603
PhosphorusP30.97376221.6959
BoronB10.81110.2960
SulfurS32.06521.7557
IridiumIr192.21715.2623
EinsteiniumEs252.0829816.9012
TelluriumTe127.6013.4933
TennessineTs292.20817.9997
ActiniumAc227.02775216.2153
CalciumCa40.07811.0972
XenonXe131.29313.5944
NeonNe20.179710.5525
OxygenO15.999410.4380
MoscoviumMc288.1925215.7795
CuriumCm243.06138916.6542

Computing molar mass step by step

First, compute the number of each atom in WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcFCm:
W: 1, C: 5, Au: 1, Og: 1, Lv: 1, Al: 1, N: 2, I: 2, Li: 1, Cl: 2, H: 1, Fr: 1, Fl: 1, F: 3, P: 2, B: 1, S: 2, Ir: 1, Es: 1, Te: 1, Ts: 1, Ac: 1, Ca: 1, Xe: 1, Ne: 1, O: 1, Mc: 2, Cm: 1

Then, lookup atomic weights for each element in periodic table:
W: 183.84, C: 12.0107, Au: 196.966569, Og: 0, Lv: 0, Al: 26.9815386, N: 14.0067, I: 126.90447, Li: 6.941, Cl: 35.453, H: 1.00794, Fr: 223.0197359, Fl: 289.18728, F: 18.9984032, P: 30.973762, B: 10.811, S: 32.065, Ir: 192.217, Es: 252.08298, Te: 127.6, Ts: 292.20755, Ac: 227.0277521, Ca: 40.078, Xe: 131.293, Ne: 20.1797, O: 15.9994, Mc: 288.19249, Cm: 243.0613891

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcFCm) = ∑ Counti * Weighti =
Count(W) * Weight(W) + Count(C) * Weight(C) + Count(Au) * Weight(Au) + Count(Og) * Weight(Og) + Count(Lv) * Weight(Lv) + Count(Al) * Weight(Al) + Count(N) * Weight(N) + Count(I) * Weight(I) + Count(Li) * Weight(Li) + Count(Cl) * Weight(Cl) + Count(H) * Weight(H) + Count(Fr) * Weight(Fr) + Count(Fl) * Weight(Fl) + Count(F) * Weight(F) + Count(P) * Weight(P) + Count(B) * Weight(B) + Count(S) * Weight(S) + Count(Ir) * Weight(Ir) + Count(Es) * Weight(Es) + Count(Te) * Weight(Te) + Count(Ts) * Weight(Ts) + Count(Ac) * Weight(Ac) + Count(Ca) * Weight(Ca) + Count(Xe) * Weight(Xe) + Count(Ne) * Weight(Ne) + Count(O) * Weight(O) + Count(Mc) * Weight(Mc) + Count(Cm) * Weight(Cm) =
1 * 183.84 + 5 * 12.0107 + 1 * 196.966569 + 1 * 0 + 1 * 0 + 1 * 26.9815386 + 2 * 14.0067 + 2 * 126.90447 + 1 * 6.941 + 2 * 35.453 + 1 * 1.00794 + 1 * 223.0197359 + 1 * 289.18728 + 3 * 18.9984032 + 2 * 30.973762 + 1 * 10.811 + 2 * 32.065 + 1 * 192.217 + 1 * 252.08298 + 1 * 127.6 + 1 * 292.20755 + 1 * 227.0277521 + 1 * 40.078 + 1 * 131.293 + 1 * 20.1797 + 1 * 15.9994 + 2 * 288.19249 + 1 * 243.0613891 =
3652.7414 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C5HAcAlAuBCaCl2CmEsF3FlFrI2IrLiLvMc2N2NeOOgP2S2TeTsWXe

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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