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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of (AcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMc)99999 is 700176521.8348 g/mol

Convert between (AcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMc)99999 weight and moles
CompoundMolesWeight, g
(AcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMc)99999

Elemental composition of (AcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMc)99999
ElementSymbolAtomic weightAtomsMass percent
ActiniumAc227.027752999993.2424
ThoriumTh232.03806999993.3140
ProtactiniumPa231.03588999993.2996
UraniumU238.02891999993.3995
NeptuniumNp236.04657999993.3712
PlutoniumPu238.049560999993.3998
AmericiumAm241.056829999993.4428
CuriumCm243.061389999993.4714
BerkeliumBk247.070307999993.5287
CaliforniumCf249.074853999993.5573
EinsteiniumEs252.08298999993.6002
FermiumFm257.095105999993.6718
MendeleviumMd258.098431999993.6862
NobeliumNo259.1010999993.7005
LawrenciumLr262.1096999993.7434
RutherfordiumRf265.1167999993.7864
DubniumDb268.1255999993.8294
SeaborgiumSg271.1335999993.8723
BohriumBh272.1380999993.8867
HassiumHs270.1347999993.8581
MeitneriumMt276.1512999993.9440
DarmstadtiumDs281.1621999994.0155
RoentgeniumRg280.1645999994.0013
CoperniciumCn285.1741999994.0728
NihoniumNh284.1781999994.0586
FleroviumFl289.1873999994.1302
MoscoviumMc288.1925999994.1160

Computing molar mass step by step

First, compute the number of each atom in (AcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMc)99999:
Ac: 99999, Th: 99999, Pa: 99999, U: 99999, Np: 99999, Pu: 99999, Am: 99999, Cm: 99999, Bk: 99999, Cf: 99999, Es: 99999, Fm: 99999, Md: 99999, No: 99999, Lr: 99999, Rf: 99999, Db: 99999, Sg: 99999, Bh: 99999, Hs: 99999, Mt: 99999, Ds: 99999, Rg: 99999, Cn: 99999, Nh: 99999, Fl: 99999, Mc: 99999

Then, lookup atomic weights for each element in periodic table:
Ac: 227.0277521, Th: 232.03806, Pa: 231.03588, U: 238.02891, Np: 236.04657, Pu: 238.0495599, Am: 241.0568291, Cm: 243.0613891, Bk: 247.070307, Cf: 249.0748535, Es: 252.08298, Fm: 257.095105, Md: 258.098431, No: 259.10103, Lr: 262.10963, Rf: 265.1167, Db: 268.12545, Sg: 271.13347, Bh: 272.13803, Hs: 270.13465, Mt: 276.15116, Ds: 281.16206, Rg: 280.16447, Cn: 285.17411, Nh: 284.17808, Fl: 289.18728, Mc: 288.19249

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass ((AcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMc)99999) = ∑ Counti * Weighti =
Count(Ac) * Weight(Ac) + Count(Th) * Weight(Th) + Count(Pa) * Weight(Pa) + Count(U) * Weight(U) + Count(Np) * Weight(Np) + Count(Pu) * Weight(Pu) + Count(Am) * Weight(Am) + Count(Cm) * Weight(Cm) + Count(Bk) * Weight(Bk) + Count(Cf) * Weight(Cf) + Count(Es) * Weight(Es) + Count(Fm) * Weight(Fm) + Count(Md) * Weight(Md) + Count(No) * Weight(No) + Count(Lr) * Weight(Lr) + Count(Rf) * Weight(Rf) + Count(Db) * Weight(Db) + Count(Sg) * Weight(Sg) + Count(Bh) * Weight(Bh) + Count(Hs) * Weight(Hs) + Count(Mt) * Weight(Mt) + Count(Ds) * Weight(Ds) + Count(Rg) * Weight(Rg) + Count(Cn) * Weight(Cn) + Count(Nh) * Weight(Nh) + Count(Fl) * Weight(Fl) + Count(Mc) * Weight(Mc) =
99999 * 227.0277521 + 99999 * 232.03806 + 99999 * 231.03588 + 99999 * 238.02891 + 99999 * 236.04657 + 99999 * 238.0495599 + 99999 * 241.0568291 + 99999 * 243.0613891 + 99999 * 247.070307 + 99999 * 249.0748535 + 99999 * 252.08298 + 99999 * 257.095105 + 99999 * 258.098431 + 99999 * 259.10103 + 99999 * 262.10963 + 99999 * 265.1167 + 99999 * 268.12545 + 99999 * 271.13347 + 99999 * 272.13803 + 99999 * 270.13465 + 99999 * 276.15116 + 99999 * 281.16206 + 99999 * 280.16447 + 99999 * 285.17411 + 99999 * 284.17808 + 99999 * 289.18728 + 99999 * 288.19249 =
700176521.8348 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is Ac99999Am99999Bh99999Bk99999Cf99999Cm99999Cn99999Db99999Ds99999Es99999Fl99999Fm99999Hs99999Lr99999Mc99999Md99999Mt99999Nh99999No99999Np99999Pa99999Pu99999Rf99999Rg99999Sg99999Th99999U99999

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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