Printed from https://www.webqc.org

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of HBCNOFPSKVYIWUXeLvFeSgPaTcRnTaPmLuYbOsSrTeSeInMtBeCsPdPrNdRh is 4046.4496 g/mol

Convert between HBCNOFPSKVYIWUXeLvFeSgPaTcRnTaPmLuYbOsSrTeSeInMtBeCsPdPrNdRh weight and moles
CompoundMolesWeight, g
HBCNOFPSKVYIWUXeLvFeSgPaTcRnTaPmLuYbOsSrTeSeInMtBeCsPdPrNdRh

Elemental composition of HBCNOFPSKVYIWUXeLvFeSgPaTcRnTaPmLuYbOsSrTeSeInMtBeCsPdPrNdRh
ElementSymbolAtomic weightAtomsMass percent
HydrogenH1.0079410.0249
BoronB10.81110.2672
CarbonC12.010710.2968
NitrogenN14.006710.3461
OxygenO15.999410.3954
FluorineF18.998403210.4695
PhosphorusP30.97376210.7655
SulfurS32.06510.7924
PotassiumK39.098310.9662
VanadiumV50.941511.2589
YttriumY88.9058512.1971
IodineI126.9044713.1362
TungstenW183.8414.5432
UraniumU238.0289115.8824
XenonXe131.29313.2446
LivermoriumLv0.000000010.0000
IronFe55.84511.3801
SeaborgiumSg271.133516.7005
ProtactiniumPa231.0358815.7096
TechnetiumTc96.90636512.3948
RadonRn210.99060115.2142
TantalumTa180.9478814.4718
PromethiumPm144.91274913.5812
LutetiumLu174.966814.3240
YtterbiumYb173.05414.2767
OsmiumOs190.2314.7012
StrontiumSr87.6212.1654
TelluriumTe127.6013.1534
SeleniumSe78.9611.9513
IndiumIn114.81812.8375
MeitneriumMt276.151216.8245
BerylliumBe9.01218210.2227
CesiumCs132.905451913.2845
PalladiumPd106.4212.6300
PraseodymiumPr140.9076513.4823
NeodymiumNd144.24213.5647
RhodiumRh102.9055012.5431

Computing molar mass step by step

First, compute the number of each atom in HBCNOFPSKVYIWUXeLvFeSgPaTcRnTaPmLuYbOsSrTeSeInMtBeCsPdPrNdRh:
H: 1, B: 1, C: 1, N: 1, O: 1, F: 1, P: 1, S: 1, K: 1, V: 1, Y: 1, I: 1, W: 1, U: 1, Xe: 1, Lv: 1, Fe: 1, Sg: 1, Pa: 1, Tc: 1, Rn: 1, Ta: 1, Pm: 1, Lu: 1, Yb: 1, Os: 1, Sr: 1, Te: 1, Se: 1, In: 1, Mt: 1, Be: 1, Cs: 1, Pd: 1, Pr: 1, Nd: 1, Rh: 1

Then, lookup atomic weights for each element in periodic table:
H: 1.00794, B: 10.811, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, P: 30.973762, S: 32.065, K: 39.0983, V: 50.9415, Y: 88.90585, I: 126.90447, W: 183.84, U: 238.02891, Xe: 131.293, Lv: 0, Fe: 55.845, Sg: 271.13347, Pa: 231.03588, Tc: 96.906365, Rn: 210.990601, Ta: 180.94788, Pm: 144.912749, Lu: 174.9668, Yb: 173.054, Os: 190.23, Sr: 87.62, Te: 127.6, Se: 78.96, In: 114.818, Mt: 276.15116, Be: 9.012182, Cs: 132.9054519, Pd: 106.42, Pr: 140.90765, Nd: 144.242, Rh: 102.9055

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (HBCNOFPSKVYIWUXeLvFeSgPaTcRnTaPmLuYbOsSrTeSeInMtBeCsPdPrNdRh) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(B) * Weight(B) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(K) * Weight(K) + Count(V) * Weight(V) + Count(Y) * Weight(Y) + Count(I) * Weight(I) + Count(W) * Weight(W) + Count(U) * Weight(U) + Count(Xe) * Weight(Xe) + Count(Lv) * Weight(Lv) + Count(Fe) * Weight(Fe) + Count(Sg) * Weight(Sg) + Count(Pa) * Weight(Pa) + Count(Tc) * Weight(Tc) + Count(Rn) * Weight(Rn) + Count(Ta) * Weight(Ta) + Count(Pm) * Weight(Pm) + Count(Lu) * Weight(Lu) + Count(Yb) * Weight(Yb) + Count(Os) * Weight(Os) + Count(Sr) * Weight(Sr) + Count(Te) * Weight(Te) + Count(Se) * Weight(Se) + Count(In) * Weight(In) + Count(Mt) * Weight(Mt) + Count(Be) * Weight(Be) + Count(Cs) * Weight(Cs) + Count(Pd) * Weight(Pd) + Count(Pr) * Weight(Pr) + Count(Nd) * Weight(Nd) + Count(Rh) * Weight(Rh) =
1 * 1.00794 + 1 * 10.811 + 1 * 12.0107 + 1 * 14.0067 + 1 * 15.9994 + 1 * 18.9984032 + 1 * 30.973762 + 1 * 32.065 + 1 * 39.0983 + 1 * 50.9415 + 1 * 88.90585 + 1 * 126.90447 + 1 * 183.84 + 1 * 238.02891 + 1 * 131.293 + 1 * 0 + 1 * 55.845 + 1 * 271.13347 + 1 * 231.03588 + 1 * 96.906365 + 1 * 210.990601 + 1 * 180.94788 + 1 * 144.912749 + 1 * 174.9668 + 1 * 173.054 + 1 * 190.23 + 1 * 87.62 + 1 * 127.6 + 1 * 78.96 + 1 * 114.818 + 1 * 276.15116 + 1 * 9.012182 + 1 * 132.9054519 + 1 * 106.42 + 1 * 140.90765 + 1 * 144.242 + 1 * 102.9055 =
4046.4496 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is CHBBeCsFFeIInKLuLvMtNNdOOsPPaPdPmPrRhRnSSeSgSrTaTcTeUVWXeYYb

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