Printed from https://www.webqc.org

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Mn2(SO4)3Fe4Mg2Rn1Au1Ag1Br3Fr2H119CsPbISi4USnSbRaXeHe30Ni3Mt is 3979.0543 g/mol

Convert between Mn2(SO4)3Fe4Mg2Rn1Au1Ag1Br3Fr2H119CsPbISi4USnSbRaXeHe30Ni3Mt weight and moles
CompoundMolesWeight, g
Mn2(SO4)3Fe4Mg2Rn1Au1Ag1Br3Fr2H119CsPbISi4USnSbRaXeHe30Ni3Mt

Elemental composition of Mn2(SO4)3Fe4Mg2Rn1Au1Ag1Br3Fr2H119CsPbISi4USnSbRaXeHe30Ni3Mt
ElementSymbolAtomic weightAtomsMass percent
ManganeseMn54.93804522.7614
IronFe55.84545.6139
MagnesiumMg24.305021.2216
RadonRn210.99060115.3025
GoldAu196.96656914.9501
SilverAg107.868212.7109
BromineBr79.90436.0243
FranciumFr223.019736211.2097
HydrogenH1.007941193.0144
CesiumCs132.905451913.3401
LeadPb207.215.2073
IodineI126.9044713.1893
SiliconSi28.085542.8233
UraniumU238.0289115.9820
TinSn118.71012.9834
AntimonySb121.76013.0600
RadiumRa226.02541015.6804
XenonXe131.29313.2996
HeliumHe4.002602303.0178
NickelNi58.693434.4252
MeitneriumMt276.151216.9401
SulfurS32.06532.4175
OxygenO15.9994124.8251

Computing molar mass step by step

First, compute the number of each atom in Mn2(SO4)3Fe4Mg2Rn1Au1Ag1Br3Fr2H119CsPbISi4USnSbRaXeHe30Ni3Mt:
Mn: 2, Fe: 4, Mg: 2, Rn: 1, Au: 1, Ag: 1, Br: 3, Fr: 2, H: 119, Cs: 1, Pb: 1, I: 1, Si: 4, U: 1, Sn: 1, Sb: 1, Ra: 1, Xe: 1, He: 30, Ni: 3, Mt: 1, S: 3, O: 12

Then, lookup atomic weights for each element in periodic table:
Mn: 54.938045, Fe: 55.845, Mg: 24.305, Rn: 210.990601, Au: 196.966569, Ag: 107.8682, Br: 79.904, Fr: 223.0197359, H: 1.00794, Cs: 132.9054519, Pb: 207.2, I: 126.90447, Si: 28.0855, U: 238.02891, Sn: 118.71, Sb: 121.76, Ra: 226.0254098, Xe: 131.293, He: 4.002602, Ni: 58.6934, Mt: 276.15116, S: 32.065, O: 15.9994

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (Mn2(SO4)3Fe4Mg2Rn1Au1Ag1Br3Fr2H119CsPbISi4USnSbRaXeHe30Ni3Mt) = ∑ Counti * Weighti =
Count(Mn) * Weight(Mn) + Count(Fe) * Weight(Fe) + Count(Mg) * Weight(Mg) + Count(Rn) * Weight(Rn) + Count(Au) * Weight(Au) + Count(Ag) * Weight(Ag) + Count(Br) * Weight(Br) + Count(Fr) * Weight(Fr) + Count(H) * Weight(H) + Count(Cs) * Weight(Cs) + Count(Pb) * Weight(Pb) + Count(I) * Weight(I) + Count(Si) * Weight(Si) + Count(U) * Weight(U) + Count(Sn) * Weight(Sn) + Count(Sb) * Weight(Sb) + Count(Ra) * Weight(Ra) + Count(Xe) * Weight(Xe) + Count(He) * Weight(He) + Count(Ni) * Weight(Ni) + Count(Mt) * Weight(Mt) + Count(S) * Weight(S) + Count(O) * Weight(O) =
2 * 54.938045 + 4 * 55.845 + 2 * 24.305 + 1 * 210.990601 + 1 * 196.966569 + 1 * 107.8682 + 3 * 79.904 + 2 * 223.0197359 + 119 * 1.00794 + 1 * 132.9054519 + 1 * 207.2 + 1 * 126.90447 + 4 * 28.0855 + 1 * 238.02891 + 1 * 118.71 + 1 * 121.76 + 1 * 226.0254098 + 1 * 131.293 + 30 * 4.002602 + 3 * 58.6934 + 1 * 276.15116 + 3 * 32.065 + 12 * 15.9994 =
3979.0543 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is AgAuBr3CsFe4Fr2H119He30IMg2Mn2MtNi3O12PbRaRnS3SbSi4SnUXe

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