Printed from https://www.webqc.org

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of HLiNaKRbCsFrBeMgCaSrBaRaU(C7H7)TiZrHfRfVNbTaDbCrMoWSgMnTcReBh is 3753.6949 g/mol

Convert between HLiNaKRbCsFrBeMgCaSrBaRaU(C7H7)TiZrHfRfVNbTaDbCrMoWSgMnTcReBh weight and moles
CompoundMolesWeight, g
HLiNaKRbCsFrBeMgCaSrBaRaU(C7H7)TiZrHfRfVNbTaDbCrMoWSgMnTcReBh

Elemental composition of HLiNaKRbCsFrBeMgCaSrBaRaU(C7H7)TiZrHfRfVNbTaDbCrMoWSgMnTcReBh
ElementSymbolAtomic weightAtomsMass percent
HydrogenH1.0079480.2148
LithiumLi6.94110.1849
SodiumNa22.9897692810.6125
PotassiumK39.098311.0416
RubidiumRb85.467812.2769
CesiumCs132.905451913.5407
FranciumFr223.01973615.9413
BerylliumBe9.01218210.2401
MagnesiumMg24.305010.6475
CalciumCa40.07811.0677
StrontiumSr87.6212.3342
BariumBa137.32713.6584
RadiumRa226.02541016.0214
UraniumU238.0289116.3412
TitaniumTi47.86711.2752
ZirconiumZr91.22412.4302
HafniumHf178.4914.7550
RutherfordiumRf265.116717.0628
VanadiumV50.941511.3571
NiobiumNb92.9063812.4751
TantalumTa180.9478814.8205
DubniumDb268.125517.1430
ChromiumCr51.996111.3852
MolybdenumMo95.9612.5564
TungstenW183.8414.8976
SeaborgiumSg271.133517.2231
ManganeseMn54.93804511.4636
TechnetiumTc96.90636512.5816
RheniumRe186.20714.9606
BohriumBh272.138017.2499
CarbonC12.010772.2398

Computing molar mass step by step

First, compute the number of each atom in HLiNaKRbCsFrBeMgCaSrBaRaU(C7H7)TiZrHfRfVNbTaDbCrMoWSgMnTcReBh:
H: 8, Li: 1, Na: 1, K: 1, Rb: 1, Cs: 1, Fr: 1, Be: 1, Mg: 1, Ca: 1, Sr: 1, Ba: 1, Ra: 1, U: 1, Ti: 1, Zr: 1, Hf: 1, Rf: 1, V: 1, Nb: 1, Ta: 1, Db: 1, Cr: 1, Mo: 1, W: 1, Sg: 1, Mn: 1, Tc: 1, Re: 1, Bh: 1, C: 7

Then, lookup atomic weights for each element in periodic table:
H: 1.00794, Li: 6.941, Na: 22.98976928, K: 39.0983, Rb: 85.4678, Cs: 132.9054519, Fr: 223.0197359, Be: 9.012182, Mg: 24.305, Ca: 40.078, Sr: 87.62, Ba: 137.327, Ra: 226.0254098, U: 238.02891, Ti: 47.867, Zr: 91.224, Hf: 178.49, Rf: 265.1167, V: 50.9415, Nb: 92.90638, Ta: 180.94788, Db: 268.12545, Cr: 51.9961, Mo: 95.96, W: 183.84, Sg: 271.13347, Mn: 54.938045, Tc: 96.906365, Re: 186.207, Bh: 272.13803, C: 12.0107

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (HLiNaKRbCsFrBeMgCaSrBaRaU(C7H7)TiZrHfRfVNbTaDbCrMoWSgMnTcReBh) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(Li) * Weight(Li) + Count(Na) * Weight(Na) + Count(K) * Weight(K) + Count(Rb) * Weight(Rb) + Count(Cs) * Weight(Cs) + Count(Fr) * Weight(Fr) + Count(Be) * Weight(Be) + Count(Mg) * Weight(Mg) + Count(Ca) * Weight(Ca) + Count(Sr) * Weight(Sr) + Count(Ba) * Weight(Ba) + Count(Ra) * Weight(Ra) + Count(U) * Weight(U) + Count(Ti) * Weight(Ti) + Count(Zr) * Weight(Zr) + Count(Hf) * Weight(Hf) + Count(Rf) * Weight(Rf) + Count(V) * Weight(V) + Count(Nb) * Weight(Nb) + Count(Ta) * Weight(Ta) + Count(Db) * Weight(Db) + Count(Cr) * Weight(Cr) + Count(Mo) * Weight(Mo) + Count(W) * Weight(W) + Count(Sg) * Weight(Sg) + Count(Mn) * Weight(Mn) + Count(Tc) * Weight(Tc) + Count(Re) * Weight(Re) + Count(Bh) * Weight(Bh) + Count(C) * Weight(C) =
8 * 1.00794 + 1 * 6.941 + 1 * 22.98976928 + 1 * 39.0983 + 1 * 85.4678 + 1 * 132.9054519 + 1 * 223.0197359 + 1 * 9.012182 + 1 * 24.305 + 1 * 40.078 + 1 * 87.62 + 1 * 137.327 + 1 * 226.0254098 + 1 * 238.02891 + 1 * 47.867 + 1 * 91.224 + 1 * 178.49 + 1 * 265.1167 + 1 * 50.9415 + 1 * 92.90638 + 1 * 180.94788 + 1 * 268.12545 + 1 * 51.9961 + 1 * 95.96 + 1 * 183.84 + 1 * 271.13347 + 1 * 54.938045 + 1 * 96.906365 + 1 * 186.207 + 1 * 272.13803 + 7 * 12.0107 =
3753.6949 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C7H8BaBeBhCaCrCsDbFrHfKLiMgMnMoNaNbRaRbReRfSgSrTaTcTiUVWZr

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