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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of (C6H5)(C2H5)NaClMgTaKCsCuZnCoSbBrFNArBHeHLiBeCaBaLaWRuFeTaCoNiGaGeAs is 2209.0400 g/mol

Convert between (C6H5)(C2H5)NaClMgTaKCsCuZnCoSbBrFNArBHeHLiBeCaBaLaWRuFeTaCoNiGaGeAs weight and moles
CompoundMolesWeight, g
(C6H5)(C2H5)NaClMgTaKCsCuZnCoSbBrFNArBHeHLiBeCaBaLaWRuFeTaCoNiGaGeAs

Elemental composition of (C6H5)(C2H5)NaClMgTaKCsCuZnCoSbBrFNArBHeHLiBeCaBaLaWRuFeTaCoNiGaGeAs
ElementSymbolAtomic weightAtomsMass percent
SodiumNa22.9897692811.0407
ChlorineCl35.45311.6049
MagnesiumMg24.305011.1003
TantalumTa180.94788216.3825
PotassiumK39.098311.7699
CesiumCs132.905451916.0164
CopperCu63.54612.8766
ZincZn65.3812.9597
CobaltCo58.93319525.3356
AntimonySb121.76015.5119
BromineBr79.90413.6171
FluorineF18.998403210.8600
NitrogenN14.006710.6341
ArgonAr39.94811.8084
BoronB10.81110.4894
HeliumHe4.00260210.1812
HydrogenH1.00794110.5019
LithiumLi6.94110.3142
BerylliumBe9.01218210.4080
CalciumCa40.07811.8143
BariumBa137.32716.2166
LanthanumLa138.9054716.2880
TungstenW183.8418.3222
RutheniumRu101.0714.5753
IronFe55.84512.5280
NickelNi58.693412.6570
GalliumGa69.72313.1563
GermaniumGe72.6413.2883
ArsenicAs74.9216013.3916
CarbonC12.010784.3497

Computing molar mass step by step

First, compute the number of each atom in (C6H5)(C2H5)NaClMgTaKCsCuZnCoSbBrFNArBHeHLiBeCaBaLaWRuFeTaCoNiGaGeAs:
Na: 1, Cl: 1, Mg: 1, Ta: 2, K: 1, Cs: 1, Cu: 1, Zn: 1, Co: 2, Sb: 1, Br: 1, F: 1, N: 1, Ar: 1, B: 1, He: 1, H: 11, Li: 1, Be: 1, Ca: 1, Ba: 1, La: 1, W: 1, Ru: 1, Fe: 1, Ni: 1, Ga: 1, Ge: 1, As: 1, C: 8

Then, lookup atomic weights for each element in periodic table:
Na: 22.98976928, Cl: 35.453, Mg: 24.305, Ta: 180.94788, K: 39.0983, Cs: 132.9054519, Cu: 63.546, Zn: 65.38, Co: 58.933195, Sb: 121.76, Br: 79.904, F: 18.9984032, N: 14.0067, Ar: 39.948, B: 10.811, He: 4.002602, H: 1.00794, Li: 6.941, Be: 9.012182, Ca: 40.078, Ba: 137.327, La: 138.90547, W: 183.84, Ru: 101.07, Fe: 55.845, Ni: 58.6934, Ga: 69.723, Ge: 72.64, As: 74.9216, C: 12.0107

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass ((C6H5)(C2H5)NaClMgTaKCsCuZnCoSbBrFNArBHeHLiBeCaBaLaWRuFeTaCoNiGaGeAs) = ∑ Counti * Weighti =
Count(Na) * Weight(Na) + Count(Cl) * Weight(Cl) + Count(Mg) * Weight(Mg) + Count(Ta) * Weight(Ta) + Count(K) * Weight(K) + Count(Cs) * Weight(Cs) + Count(Cu) * Weight(Cu) + Count(Zn) * Weight(Zn) + Count(Co) * Weight(Co) + Count(Sb) * Weight(Sb) + Count(Br) * Weight(Br) + Count(F) * Weight(F) + Count(N) * Weight(N) + Count(Ar) * Weight(Ar) + Count(B) * Weight(B) + Count(He) * Weight(He) + Count(H) * Weight(H) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(Ca) * Weight(Ca) + Count(Ba) * Weight(Ba) + Count(La) * Weight(La) + Count(W) * Weight(W) + Count(Ru) * Weight(Ru) + Count(Fe) * Weight(Fe) + Count(Ni) * Weight(Ni) + Count(Ga) * Weight(Ga) + Count(Ge) * Weight(Ge) + Count(As) * Weight(As) + Count(C) * Weight(C) =
1 * 22.98976928 + 1 * 35.453 + 1 * 24.305 + 2 * 180.94788 + 1 * 39.0983 + 1 * 132.9054519 + 1 * 63.546 + 1 * 65.38 + 2 * 58.933195 + 1 * 121.76 + 1 * 79.904 + 1 * 18.9984032 + 1 * 14.0067 + 1 * 39.948 + 1 * 10.811 + 1 * 4.002602 + 11 * 1.00794 + 1 * 6.941 + 1 * 9.012182 + 1 * 40.078 + 1 * 137.327 + 1 * 138.90547 + 1 * 183.84 + 1 * 101.07 + 1 * 55.845 + 1 * 58.6934 + 1 * 69.723 + 1 * 72.64 + 1 * 74.9216 + 8 * 12.0107 =
2209.0400 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C8H11ArAsBBaBeBrCaClCo2CsCuFFeGaGeHeKLaLiMgNNaNiRuSbTa2WZn

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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