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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcF is 3409.6800 g/mol

Convert between WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcF weight and moles
CompoundMolesWeight, g
WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcF

Elemental composition of WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcF
ElementSymbolAtomic weightAtomsMass percent
TungstenW183.8415.3917
CarbonC12.010751.7613
GoldAu196.96656915.7767
OganessonOg0.000000010.0000
LivermoriumLv0.000000010.0000
AluminumAl26.981538610.7913
NitrogenN14.006720.8216
IodineI126.9044727.4438
LithiumLi6.94110.2036
ChlorineCl35.45322.0795
HydrogenH1.0079410.0296
FranciumFr223.01973616.5408
FleroviumFl289.187318.4814
FluorineF18.998403231.6716
PhosphorusP30.97376221.8168
BoronB10.81110.3171
SulfurS32.06521.8808
IridiumIr192.21715.6374
EinsteiniumEs252.0829817.3932
TelluriumTe127.6013.7423
TennessineTs292.20818.5699
ActiniumAc227.02775216.6583
CalciumCa40.07811.1754
XenonXe131.29313.8506
NeonNe20.179710.5918
OxygenO15.999410.4692
MoscoviumMc288.1925216.9044

Computing molar mass step by step

First, compute the number of each atom in WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcF:
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

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

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (WCAuOgLvAlNILiClCHFrFlFPBNPSIrSEsITeTsCAcClCaXeNeOCMcFCMcF) = ∑ 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) =
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 =
3409.6800 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C5HAcAlAuBCaCl2EsF3FlFrI2IrLiLvMc2N2NeOOgP2S2TeTsWXe

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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