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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of HHeLiBeBCaScTiVCrMnFeCuNiZnYZrNbMoTcRuRhPdAgCdLaHfTaWReOsIr9 is 4351.1663 g/mol

Convert between HHeLiBeBCaScTiVCrMnFeCuNiZnYZrNbMoTcRuRhPdAgCdLaHfTaWReOsIr9 weight and moles
CompoundMolesWeight, g
HHeLiBeBCaScTiVCrMnFeCuNiZnYZrNbMoTcRuRhPdAgCdLaHfTaWReOsIr9

Elemental composition of HHeLiBeBCaScTiVCrMnFeCuNiZnYZrNbMoTcRuRhPdAgCdLaHfTaWReOsIr9
ElementSymbolAtomic weightAtomsMass percent
HydrogenH1.0079410.0232
HeliumHe4.00260210.0920
LithiumLi6.94110.1595
BerylliumBe9.01218210.2071
BoronB10.81110.2485
CalciumCa40.07810.9211
ScandiumSc44.95591211.0332
TitaniumTi47.86711.1001
VanadiumV50.941511.1708
ChromiumCr51.996111.1950
ManganeseMn54.93804511.2626
IronFe55.84511.2834
CopperCu63.54611.4604
NickelNi58.693411.3489
ZincZn65.3811.5026
YttriumY88.9058512.0433
ZirconiumZr91.22412.0965
NiobiumNb92.9063812.1352
MolybdenumMo95.9612.2054
TechnetiumTc96.90636512.2271
RutheniumRu101.0712.3228
RhodiumRh102.9055012.3650
PalladiumPd106.4212.4458
SilverAg107.868212.4791
CadmiumCd112.41112.5835
LanthanumLa138.9054713.1924
HafniumHf178.4914.1021
TantalumTa180.9478814.1586
TungstenW183.8414.2251
RheniumRe186.20714.2795
OsmiumOs190.2314.3719
IridiumIr192.217939.7584

Computing molar mass step by step

First, compute the number of each atom in HHeLiBeBCaScTiVCrMnFeCuNiZnYZrNbMoTcRuRhPdAgCdLaHfTaWReOsIr9:
H: 1, He: 1, Li: 1, Be: 1, B: 1, Ca: 1, Sc: 1, Ti: 1, V: 1, Cr: 1, Mn: 1, Fe: 1, Cu: 1, Ni: 1, Zn: 1, Y: 1, Zr: 1, Nb: 1, Mo: 1, Tc: 1, Ru: 1, Rh: 1, Pd: 1, Ag: 1, Cd: 1, La: 1, Hf: 1, Ta: 1, W: 1, Re: 1, Os: 1, Ir: 9

Then, lookup atomic weights for each element in periodic table:
H: 1.00794, He: 4.002602, Li: 6.941, Be: 9.012182, B: 10.811, Ca: 40.078, Sc: 44.955912, Ti: 47.867, V: 50.9415, Cr: 51.9961, Mn: 54.938045, Fe: 55.845, Cu: 63.546, Ni: 58.6934, Zn: 65.38, Y: 88.90585, Zr: 91.224, Nb: 92.90638, Mo: 95.96, Tc: 96.906365, Ru: 101.07, Rh: 102.9055, Pd: 106.42, Ag: 107.8682, Cd: 112.411, La: 138.90547, Hf: 178.49, Ta: 180.94788, W: 183.84, Re: 186.207, Os: 190.23, Ir: 192.217

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (HHeLiBeBCaScTiVCrMnFeCuNiZnYZrNbMoTcRuRhPdAgCdLaHfTaWReOsIr9) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(B) * Weight(B) + Count(Ca) * Weight(Ca) + Count(Sc) * Weight(Sc) + Count(Ti) * Weight(Ti) + Count(V) * Weight(V) + Count(Cr) * Weight(Cr) + Count(Mn) * Weight(Mn) + Count(Fe) * Weight(Fe) + Count(Cu) * Weight(Cu) + Count(Ni) * Weight(Ni) + Count(Zn) * Weight(Zn) + Count(Y) * Weight(Y) + Count(Zr) * Weight(Zr) + Count(Nb) * Weight(Nb) + Count(Mo) * Weight(Mo) + Count(Tc) * Weight(Tc) + Count(Ru) * Weight(Ru) + Count(Rh) * Weight(Rh) + Count(Pd) * Weight(Pd) + Count(Ag) * Weight(Ag) + Count(Cd) * Weight(Cd) + Count(La) * Weight(La) + Count(Hf) * Weight(Hf) + Count(Ta) * Weight(Ta) + Count(W) * Weight(W) + Count(Re) * Weight(Re) + Count(Os) * Weight(Os) + Count(Ir) * Weight(Ir) =
1 * 1.00794 + 1 * 4.002602 + 1 * 6.941 + 1 * 9.012182 + 1 * 10.811 + 1 * 40.078 + 1 * 44.955912 + 1 * 47.867 + 1 * 50.9415 + 1 * 51.9961 + 1 * 54.938045 + 1 * 55.845 + 1 * 63.546 + 1 * 58.6934 + 1 * 65.38 + 1 * 88.90585 + 1 * 91.224 + 1 * 92.90638 + 1 * 95.96 + 1 * 96.906365 + 1 * 101.07 + 1 * 102.9055 + 1 * 106.42 + 1 * 107.8682 + 1 * 112.411 + 1 * 138.90547 + 1 * 178.49 + 1 * 180.94788 + 1 * 183.84 + 1 * 186.207 + 1 * 190.23 + 9 * 192.217 =
4351.1663 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is AgBBeCaCdCrCuFeHHeHfIr9LaLiMnMoNbNiOsPdReRhRuScTaTcTiVWYZnZr

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, 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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