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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of ICl6Na9P4XeH6O3C4UZnCuAgAuRaGa2HgS(CH3C(NOH)C(NO)CH3) is 2288.8338 g/mol

Convert between ICl6Na9P4XeH6O3C4UZnCuAgAuRaGa2HgS(CH3C(NOH)C(NO)CH3) weight and moles
CompoundMolesWeight, g
ICl6Na9P4XeH6O3C4UZnCuAgAuRaGa2HgS(CH3C(NOH)C(NO)CH3)

Elemental composition of ICl6Na9P4XeH6O3C4UZnCuAgAuRaGa2HgS(CH3C(NOH)C(NO)CH3)
ElementSymbolAtomic weightAtomsMass percent
IodineI126.9044715.5445
ChlorineCl35.45369.2937
SodiumNa22.9897692899.0399
PhosphorusP30.97376245.4130
XenonXe131.29315.7362
HydrogenH1.00794130.5725
OxygenO15.999453.4951
CarbonC12.010784.1980
UraniumU238.02891110.3996
ZincZn65.3812.8565
CopperCu63.54612.7763
SilverAg107.868214.7128
GoldAu196.96656918.6055
RadiumRa226.02541019.8751
GalliumGa69.72326.0924
MercuryHg200.5918.7639
SulfurS32.06511.4009
NitrogenN14.006721.2239

Computing molar mass step by step

First, compute the number of each atom in ICl6Na9P4XeH6O3C4UZnCuAgAuRaGa2HgS(CH3C(NOH)C(NO)CH3):
I: 1, Cl: 6, Na: 9, P: 4, Xe: 1, H: 13, O: 5, C: 8, U: 1, Zn: 1, Cu: 1, Ag: 1, Au: 1, Ra: 1, Ga: 2, Hg: 1, S: 1, N: 2

Then, lookup atomic weights for each element in periodic table:
I: 126.90447, Cl: 35.453, Na: 22.98976928, P: 30.973762, Xe: 131.293, H: 1.00794, O: 15.9994, C: 12.0107, U: 238.02891, Zn: 65.38, Cu: 63.546, Ag: 107.8682, Au: 196.966569, Ra: 226.0254098, Ga: 69.723, Hg: 200.59, S: 32.065, N: 14.0067

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (ICl6Na9P4XeH6O3C4UZnCuAgAuRaGa2HgS(CH3C(NOH)C(NO)CH3)) = ∑ Counti * Weighti =
Count(I) * Weight(I) + Count(Cl) * Weight(Cl) + Count(Na) * Weight(Na) + Count(P) * Weight(P) + Count(Xe) * Weight(Xe) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(C) * Weight(C) + Count(U) * Weight(U) + Count(Zn) * Weight(Zn) + Count(Cu) * Weight(Cu) + Count(Ag) * Weight(Ag) + Count(Au) * Weight(Au) + Count(Ra) * Weight(Ra) + Count(Ga) * Weight(Ga) + Count(Hg) * Weight(Hg) + Count(S) * Weight(S) + Count(N) * Weight(N) =
1 * 126.90447 + 6 * 35.453 + 9 * 22.98976928 + 4 * 30.973762 + 1 * 131.293 + 13 * 1.00794 + 5 * 15.9994 + 8 * 12.0107 + 1 * 238.02891 + 1 * 65.38 + 1 * 63.546 + 1 * 107.8682 + 1 * 196.966569 + 1 * 226.0254098 + 2 * 69.723 + 1 * 200.59 + 1 * 32.065 + 2 * 14.0067 =
2288.8338 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C8H13AgAuCl6CuGa2HgIN2Na9O5P4RaSUXeZn

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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