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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of AcPuScTiTcGeAsYZr(HHeBeLiBCNOFNeNaAlAr)9AuAgUAtHf(C6H5)9(CH3)(C2H5)Pr(C4H9) is 4675.8919 g/mol

Convert between AcPuScTiTcGeAsYZr(HHeBeLiBCNOFNeNaAlAr)9AuAgUAtHf(C6H5)9(CH3)(C2H5)Pr(C4H9) weight and moles
CompoundMolesWeight, g
AcPuScTiTcGeAsYZr(HHeBeLiBCNOFNeNaAlAr)9AuAgUAtHf(C6H5)9(CH3)(C2H5)Pr(C4H9)

Elemental composition of AcPuScTiTcGeAsYZr(HHeBeLiBCNOFNeNaAlAr)9AuAgUAtHf(C6H5)9(CH3)(C2H5)Pr(C4H9)
ElementSymbolAtomic weightAtomsMass percent
ActiniumAc227.02775214.8553
PlutoniumPu238.04956015.0910
ScandiumSc44.95591210.9614
TitaniumTi47.86711.0237
TechnetiumTc96.90636512.0725
GermaniumGe72.6411.5535
ArsenicAs74.9216011.6023
YttriumY88.9058511.9014
ZirconiumZr91.22411.9509
GoldAu196.96656914.2124
SilverAg107.868212.3069
UraniumU238.0289115.0906
AstatineAt209.98714814.4908
HafniumHf178.4913.8172
PraseodymiumPr140.9076513.0135
CarbonC12.01077017.9805
HydrogenH1.00794711.5305
HeliumHe4.00260290.7704
BerylliumBe9.01218291.7346
LithiumLi6.94191.3360
BoronB10.81192.0809
NitrogenN14.006792.6960
OxygenO15.999493.0795
FluorineF18.998403293.6567
NeonNe20.179793.8841
SodiumNa22.9897692894.4250
AluminumAl26.981538695.1933
ArgonAr39.94897.6891

Computing molar mass step by step

First, compute the number of each atom in AcPuScTiTcGeAsYZr(HHeBeLiBCNOFNeNaAlAr)9AuAgUAtHf(C6H5)9(CH3)(C2H5)Pr(C4H9):
Ac: 1, Pu: 1, Sc: 1, Ti: 1, Tc: 1, Ge: 1, As: 1, Y: 1, Zr: 1, Au: 1, Ag: 1, U: 1, At: 1, Hf: 1, Pr: 1, C: 70, H: 71, He: 9, Be: 9, Li: 9, B: 9, N: 9, O: 9, F: 9, Ne: 9, Na: 9, Al: 9, Ar: 9

Then, lookup atomic weights for each element in periodic table:
Ac: 227.0277521, Pu: 238.0495599, Sc: 44.955912, Ti: 47.867, Tc: 96.906365, Ge: 72.64, As: 74.9216, Y: 88.90585, Zr: 91.224, Au: 196.966569, Ag: 107.8682, U: 238.02891, At: 209.987148, Hf: 178.49, Pr: 140.90765, C: 12.0107, H: 1.00794, He: 4.002602, Be: 9.012182, Li: 6.941, B: 10.811, N: 14.0067, O: 15.9994, F: 18.9984032, Ne: 20.1797, Na: 22.98976928, Al: 26.9815386, Ar: 39.948

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (AcPuScTiTcGeAsYZr(HHeBeLiBCNOFNeNaAlAr)9AuAgUAtHf(C6H5)9(CH3)(C2H5)Pr(C4H9)) = ∑ Counti * Weighti =
Count(Ac) * Weight(Ac) + Count(Pu) * Weight(Pu) + Count(Sc) * Weight(Sc) + Count(Ti) * Weight(Ti) + Count(Tc) * Weight(Tc) + Count(Ge) * Weight(Ge) + Count(As) * Weight(As) + Count(Y) * Weight(Y) + Count(Zr) * Weight(Zr) + Count(Au) * Weight(Au) + Count(Ag) * Weight(Ag) + Count(U) * Weight(U) + Count(At) * Weight(At) + Count(Hf) * Weight(Hf) + Count(Pr) * Weight(Pr) + Count(C) * Weight(C) + Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Be) * Weight(Be) + Count(Li) * Weight(Li) + Count(B) * Weight(B) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(Ne) * Weight(Ne) + Count(Na) * Weight(Na) + Count(Al) * Weight(Al) + Count(Ar) * Weight(Ar) =
1 * 227.0277521 + 1 * 238.0495599 + 1 * 44.955912 + 1 * 47.867 + 1 * 96.906365 + 1 * 72.64 + 1 * 74.9216 + 1 * 88.90585 + 1 * 91.224 + 1 * 196.966569 + 1 * 107.8682 + 1 * 238.02891 + 1 * 209.987148 + 1 * 178.49 + 1 * 140.90765 + 70 * 12.0107 + 71 * 1.00794 + 9 * 4.002602 + 9 * 9.012182 + 9 * 6.941 + 9 * 10.811 + 9 * 14.0067 + 9 * 15.9994 + 9 * 18.9984032 + 9 * 20.1797 + 9 * 22.98976928 + 9 * 26.9815386 + 9 * 39.948 =
4675.8919 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C70H71AcAgAl9Ar9AsAtAuB9Be9F9GeHe9HfLi9N9Na9Ne9O9PrPuScTcTiUYZr

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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