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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Na48Eu75Am873Db84CO908I283Ir746Au76Y2K73Gd56Cm837Tb652Hs1627 is 1212691.5047 g/mol

Convert between Na48Eu75Am873Db84CO908I283Ir746Au76Y2K73Gd56Cm837Tb652Hs1627 weight and moles
CompoundMolesWeight, g
Na48Eu75Am873Db84CO908I283Ir746Au76Y2K73Gd56Cm837Tb652Hs1627

Elemental composition of Na48Eu75Am873Db84CO908I283Ir746Au76Y2K73Gd56Cm837Tb652Hs1627
ElementSymbolAtomic weightAtomsMass percent
SodiumNa22.98976928480.0910
EuropiumEu151.964750.9398
AmericiumAm241.05682987317.3534
DubniumDb268.1255841.8572
CarbonC12.010710.0010
OxygenO15.99949081.1980
IodineI126.904472832.9615
IridiumIr192.21774611.8244
GoldAu196.966569761.2344
YttriumY88.9058520.0147
PotassiumK39.0983730.2354
GadoliniumGd157.25560.7262
CuriumCm243.06138983716.7761
TerbiumTb158.925356528.5446
HassiumHs270.1347162736.2424

Computing molar mass step by step

First, compute the number of each atom in Na48Eu75Am873Db84CO908I283Ir746Au76Y2K73Gd56Cm837Tb652Hs1627:
Na: 48, Eu: 75, Am: 873, Db: 84, C: 1, O: 908, I: 283, Ir: 746, Au: 76, Y: 2, K: 73, Gd: 56, Cm: 837, Tb: 652, Hs: 1627

Then, lookup atomic weights for each element in periodic table:
Na: 22.98976928, Eu: 151.964, Am: 241.0568291, Db: 268.12545, C: 12.0107, O: 15.9994, I: 126.90447, Ir: 192.217, Au: 196.966569, Y: 88.90585, K: 39.0983, Gd: 157.25, Cm: 243.0613891, Tb: 158.92535, Hs: 270.13465

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (Na48Eu75Am873Db84CO908I283Ir746Au76Y2K73Gd56Cm837Tb652Hs1627) = ∑ Counti * Weighti =
Count(Na) * Weight(Na) + Count(Eu) * Weight(Eu) + Count(Am) * Weight(Am) + Count(Db) * Weight(Db) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(I) * Weight(I) + Count(Ir) * Weight(Ir) + Count(Au) * Weight(Au) + Count(Y) * Weight(Y) + Count(K) * Weight(K) + Count(Gd) * Weight(Gd) + Count(Cm) * Weight(Cm) + Count(Tb) * Weight(Tb) + Count(Hs) * Weight(Hs) =
48 * 22.98976928 + 75 * 151.964 + 873 * 241.0568291 + 84 * 268.12545 + 1 * 12.0107 + 908 * 15.9994 + 283 * 126.90447 + 746 * 192.217 + 76 * 196.966569 + 2 * 88.90585 + 73 * 39.0983 + 56 * 157.25 + 837 * 243.0613891 + 652 * 158.92535 + 1627 * 270.13465 =
1212691.5047 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is CAm873Au76Cm837Db84Eu75Gd56Hs1627I283Ir746K73Na48O908Tb652Y2

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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