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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of VO2H2C8Na2LuFeCuCrFP2Li3BrBeClTiHgUMnTcSnPoPbFrHfOsDbTmTeI is 3256.0399 g/mol

Convert between VO2H2C8Na2LuFeCuCrFP2Li3BrBeClTiHgUMnTcSnPoPbFrHfOsDbTmTeI weight and moles
CompoundMolesWeight, g
VO2H2C8Na2LuFeCuCrFP2Li3BrBeClTiHgUMnTcSnPoPbFrHfOsDbTmTeI

Elemental composition of VO2H2C8Na2LuFeCuCrFP2Li3BrBeClTiHgUMnTcSnPoPbFrHfOsDbTmTeI
ElementSymbolAtomic weightAtomsMass percent
VanadiumV50.941511.5645
OxygenO15.999420.9828
HydrogenH1.0079420.0619
CarbonC12.010782.9510
SodiumNa22.9897692821.4121
LutetiumLu174.966815.3736
IronFe55.84511.7151
CopperCu63.54611.9516
ChromiumCr51.996111.5969
FluorineF18.998403210.5835
PhosphorusP30.97376221.9025
LithiumLi6.94130.6395
BromineBr79.90412.4540
BerylliumBe9.01218210.2768
ChlorineCl35.45311.0888
TitaniumTi47.86711.4701
MercuryHg200.5916.1606
UraniumU238.0289117.3104
ManganeseMn54.93804511.6873
TechnetiumTc96.90636512.9762
TinSn118.71013.6458
PoloniumPo208.98243016.4183
LeadPb207.216.3636
FranciumFr223.01973616.8494
HafniumHf178.4915.4818
OsmiumOs190.2315.8424
DubniumDb268.125518.2347
ThuliumTm168.9342115.1883
TelluriumTe127.6013.9189
IodineI126.9044713.8975

Computing molar mass step by step

First, compute the number of each atom in VO2H2C8Na2LuFeCuCrFP2Li3BrBeClTiHgUMnTcSnPoPbFrHfOsDbTmTeI:
V: 1, O: 2, H: 2, C: 8, Na: 2, Lu: 1, Fe: 1, Cu: 1, Cr: 1, F: 1, P: 2, Li: 3, Br: 1, Be: 1, Cl: 1, Ti: 1, Hg: 1, U: 1, Mn: 1, Tc: 1, Sn: 1, Po: 1, Pb: 1, Fr: 1, Hf: 1, Os: 1, Db: 1, Tm: 1, Te: 1, I: 1

Then, lookup atomic weights for each element in periodic table:
V: 50.9415, O: 15.9994, H: 1.00794, C: 12.0107, Na: 22.98976928, Lu: 174.9668, Fe: 55.845, Cu: 63.546, Cr: 51.9961, F: 18.9984032, P: 30.973762, Li: 6.941, Br: 79.904, Be: 9.012182, Cl: 35.453, Ti: 47.867, Hg: 200.59, U: 238.02891, Mn: 54.938045, Tc: 96.906365, Sn: 118.71, Po: 208.9824304, Pb: 207.2, Fr: 223.0197359, Hf: 178.49, Os: 190.23, Db: 268.12545, Tm: 168.93421, Te: 127.6, I: 126.90447

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (VO2H2C8Na2LuFeCuCrFP2Li3BrBeClTiHgUMnTcSnPoPbFrHfOsDbTmTeI) = ∑ Counti * Weighti =
Count(V) * Weight(V) + Count(O) * Weight(O) + Count(H) * Weight(H) + Count(C) * Weight(C) + Count(Na) * Weight(Na) + Count(Lu) * Weight(Lu) + Count(Fe) * Weight(Fe) + Count(Cu) * Weight(Cu) + Count(Cr) * Weight(Cr) + Count(F) * Weight(F) + Count(P) * Weight(P) + Count(Li) * Weight(Li) + Count(Br) * Weight(Br) + Count(Be) * Weight(Be) + Count(Cl) * Weight(Cl) + Count(Ti) * Weight(Ti) + Count(Hg) * Weight(Hg) + Count(U) * Weight(U) + Count(Mn) * Weight(Mn) + Count(Tc) * Weight(Tc) + Count(Sn) * Weight(Sn) + Count(Po) * Weight(Po) + Count(Pb) * Weight(Pb) + Count(Fr) * Weight(Fr) + Count(Hf) * Weight(Hf) + Count(Os) * Weight(Os) + Count(Db) * Weight(Db) + Count(Tm) * Weight(Tm) + Count(Te) * Weight(Te) + Count(I) * Weight(I) =
1 * 50.9415 + 2 * 15.9994 + 2 * 1.00794 + 8 * 12.0107 + 2 * 22.98976928 + 1 * 174.9668 + 1 * 55.845 + 1 * 63.546 + 1 * 51.9961 + 1 * 18.9984032 + 2 * 30.973762 + 3 * 6.941 + 1 * 79.904 + 1 * 9.012182 + 1 * 35.453 + 1 * 47.867 + 1 * 200.59 + 1 * 238.02891 + 1 * 54.938045 + 1 * 96.906365 + 1 * 118.71 + 1 * 208.9824304 + 1 * 207.2 + 1 * 223.0197359 + 1 * 178.49 + 1 * 190.23 + 1 * 268.12545 + 1 * 168.93421 + 1 * 127.6 + 1 * 126.90447 =
3256.0399 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C8H2BeBrClCrCuDbFFeFrHfHgILi3LuMnNa2O2OsP2PbPoSnTcTeTiTmUV

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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