Printed from https://www.webqc.org

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoCuZnGaGeAsSeBr99 is 9134.0908 g/mol

Convert between HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoCuZnGaGeAsSeBr99 weight and moles
CompoundMolesWeight, g
HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoCuZnGaGeAsSeBr99

Elemental composition of HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoCuZnGaGeAsSeBr99
ElementSymbolAtomic weightAtomsMass percent
HydrogenH1.0079410.0110
HeliumHe4.00260210.0438
LithiumLi6.94110.0760
BerylliumBe9.01218210.0987
BoronB10.81110.1184
CarbonC12.010710.1315
NitrogenN14.006710.1533
OxygenO15.999410.1752
FluorineF18.998403210.2080
NeonNe20.179710.2209
SodiumNa22.9897692810.2517
MagnesiumMg24.305010.2661
AluminumAl26.981538610.2954
SiliconSi28.085510.3075
PhosphorusP30.97376210.3391
SulfurS32.06510.3510
ChlorineCl35.45310.3881
ArgonAr39.94810.4374
PotassiumK39.098310.4280
CalciumCa40.07810.4388
ScandiumSc44.95591210.4922
TitaniumTi47.86710.5240
VanadiumV50.941510.5577
ChromiumCr51.996110.5693
ManganeseMn54.93804510.6015
IronFe55.84510.6114
CobaltCo58.93319510.6452
CopperCu63.54610.6957
ZincZn65.3810.7158
GalliumGa69.72310.7633
GermaniumGe72.6410.7953
ArsenicAs74.9216010.8202
SeleniumSe78.9610.8645
BromineBr79.9049986.6041

Computing molar mass step by step

First, compute the number of each atom in HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoCuZnGaGeAsSeBr99:
H: 1, He: 1, Li: 1, Be: 1, B: 1, C: 1, N: 1, O: 1, F: 1, Ne: 1, Na: 1, Mg: 1, Al: 1, Si: 1, P: 1, S: 1, Cl: 1, Ar: 1, K: 1, Ca: 1, Sc: 1, Ti: 1, V: 1, Cr: 1, Mn: 1, Fe: 1, Co: 1, Cu: 1, Zn: 1, Ga: 1, Ge: 1, As: 1, Se: 1, Br: 99

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, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, Ne: 20.1797, Na: 22.98976928, Mg: 24.305, Al: 26.9815386, Si: 28.0855, P: 30.973762, S: 32.065, Cl: 35.453, Ar: 39.948, K: 39.0983, Ca: 40.078, Sc: 44.955912, Ti: 47.867, V: 50.9415, Cr: 51.9961, Mn: 54.938045, Fe: 55.845, Co: 58.933195, Cu: 63.546, Zn: 65.38, Ga: 69.723, Ge: 72.64, As: 74.9216, Se: 78.96, Br: 79.904

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoCuZnGaGeAsSeBr99) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(B) * Weight(B) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(Ne) * Weight(Ne) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(Si) * Weight(Si) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Cl) * Weight(Cl) + Count(Ar) * Weight(Ar) + Count(K) * Weight(K) + 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(Co) * Weight(Co) + Count(Cu) * Weight(Cu) + Count(Zn) * Weight(Zn) + Count(Ga) * Weight(Ga) + Count(Ge) * Weight(Ge) + Count(As) * Weight(As) + Count(Se) * Weight(Se) + Count(Br) * Weight(Br) =
1 * 1.00794 + 1 * 4.002602 + 1 * 6.941 + 1 * 9.012182 + 1 * 10.811 + 1 * 12.0107 + 1 * 14.0067 + 1 * 15.9994 + 1 * 18.9984032 + 1 * 20.1797 + 1 * 22.98976928 + 1 * 24.305 + 1 * 26.9815386 + 1 * 28.0855 + 1 * 30.973762 + 1 * 32.065 + 1 * 35.453 + 1 * 39.948 + 1 * 39.0983 + 1 * 40.078 + 1 * 44.955912 + 1 * 47.867 + 1 * 50.9415 + 1 * 51.9961 + 1 * 54.938045 + 1 * 55.845 + 1 * 58.933195 + 1 * 63.546 + 1 * 65.38 + 1 * 69.723 + 1 * 72.64 + 1 * 74.9216 + 1 * 78.96 + 99 * 79.904 =
9134.0908 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is CHAlArAsBBeBr99CaClCoCrCuFFeGaGeHeKLiMgMnNNaNeOPSScSeSiTiVZn

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
Please let us know how we can improve this web app.
Menu Balance Molar mass Gas laws Units Chemistry tools Periodic table Chemical forum Symmetry Constants Contribute Contact us
How to cite?
Choose languageDeutschEnglishEspañolFrançaisItalianoNederlandsPolskiPortuguêsРусский中文日本語한국어