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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Al2Fe2H32Li12Na7Cl31F12O10Bi2Te5La2Ac9Y21PoUus9Au21Ag26Cs99 is 30110.5510 g/mol

Convert between Al2Fe2H32Li12Na7Cl31F12O10Bi2Te5La2Ac9Y21PoUus9Au21Ag26Cs99 weight and moles
CompoundMolesWeight, g
Al2Fe2H32Li12Na7Cl31F12O10Bi2Te5La2Ac9Y21PoUus9Au21Ag26Cs99

Elemental composition of Al2Fe2H32Li12Na7Cl31F12O10Bi2Te5La2Ac9Y21PoUus9Au21Ag26Cs99
ElementSymbolAtomic weightAtomsMass percent
AluminumAl26.981538620.1792
IronFe55.84520.3709
HydrogenH1.00794320.1071
LithiumLi6.941120.2766
SodiumNa22.9897692870.5345
ChlorineCl35.453313.6500
FluorineF18.9984032120.7571
OxygenO15.9994100.5314
BismuthBi208.9804021.3881
TelluriumTe127.6052.1189
LanthanumLa138.9054720.9226
ActiniumAc227.02775296.7858
YttriumY88.90585216.2006
PoloniumPo208.98243010.6941
TennessineUus292.20898.7340
GoldAu196.9665692113.7370
SilverAg107.8682269.3143
CesiumCs132.90545199943.6978

Computing molar mass step by step

First, compute the number of each atom in Al2Fe2H32Li12Na7Cl31F12O10Bi2Te5La2Ac9Y21PoUus9Au21Ag26Cs99:
Al: 2, Fe: 2, H: 32, Li: 12, Na: 7, Cl: 31, F: 12, O: 10, Bi: 2, Te: 5, La: 2, Ac: 9, Y: 21, Po: 1, Uus: 9, Au: 21, Ag: 26, Cs: 99

Then, lookup atomic weights for each element in periodic table:
Al: 26.9815386, Fe: 55.845, H: 1.00794, Li: 6.941, Na: 22.98976928, Cl: 35.453, F: 18.9984032, O: 15.9994, Bi: 208.9804, Te: 127.6, La: 138.90547, Ac: 227.0277521, Y: 88.90585, Po: 208.9824304, Uus: 292.20755, Au: 196.966569, Ag: 107.8682, Cs: 132.9054519

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (Al2Fe2H32Li12Na7Cl31F12O10Bi2Te5La2Ac9Y21PoUus9Au21Ag26Cs99) = ∑ Counti * Weighti =
Count(Al) * Weight(Al) + Count(Fe) * Weight(Fe) + Count(H) * Weight(H) + Count(Li) * Weight(Li) + Count(Na) * Weight(Na) + Count(Cl) * Weight(Cl) + Count(F) * Weight(F) + Count(O) * Weight(O) + Count(Bi) * Weight(Bi) + Count(Te) * Weight(Te) + Count(La) * Weight(La) + Count(Ac) * Weight(Ac) + Count(Y) * Weight(Y) + Count(Po) * Weight(Po) + Count(Uus) * Weight(Uus) + Count(Au) * Weight(Au) + Count(Ag) * Weight(Ag) + Count(Cs) * Weight(Cs) =
2 * 26.9815386 + 2 * 55.845 + 32 * 1.00794 + 12 * 6.941 + 7 * 22.98976928 + 31 * 35.453 + 12 * 18.9984032 + 10 * 15.9994 + 2 * 208.9804 + 5 * 127.6 + 2 * 138.90547 + 9 * 227.0277521 + 21 * 88.90585 + 1 * 208.9824304 + 9 * 292.20755 + 21 * 196.966569 + 26 * 107.8682 + 99 * 132.9054519 =
30110.5510 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is Ac9Ag26Al2Au21Bi2Cl31Cs99F12Fe2H32La2Li12Na7O10PoTe5Uus9Y21

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

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