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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of FeCl2N6C30H24 is 595.3028 g/mol

Convert between FeCl2N6C30H24 weight and moles
CompoundMolesWeight, g
FeCl2N6C30H24

Elemental composition of FeCl2N6C30H24
ElementSymbolAtomic weightAtomsMass percent
IronFe55.84519.3809
ChlorineCl35.453211.9109
NitrogenN14.0067614.1172
CarbonC12.01073060.5274
HydrogenH1.00794244.0636

Computing molar mass step by step

First, compute the number of each atom in FeCl2N6C30H24:
Fe: 1, Cl: 2, N: 6, C: 30, H: 24

Then, lookup atomic weights for each element in periodic table:
Fe: 55.845, Cl: 35.453, N: 14.0067, C: 12.0107, H: 1.00794

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (FeCl2N6C30H24) = ∑ Counti * Weighti =
Count(Fe) * Weight(Fe) + Count(Cl) * Weight(Cl) + Count(N) * Weight(N) + Count(C) * Weight(C) + Count(H) * Weight(H) =
1 * 55.845 + 2 * 35.453 + 6 * 14.0067 + 30 * 12.0107 + 24 * 1.00794 =
595.3028 g/mol


Mass percent compositionAtomic percent composition

Related compounds
FormulaCompound name
C8H20Cl4FeNTetraethylammonium tetrachloroferrate
C8H15Cl4FeN21-Butyl-3-methylimidazolium tetrachloroferrate
C4H24Cl7FeN4Tetrakis(methylammonium) hexachloroferrate(III) chloride
C44H28N4ClFeIron(tetraphenylporphyrinato) chloride
C20N4H20FeCl2Dichlorotetrakis(pyridine)iron(II)

Formula in Hill system is C30H24Cl2FeN6

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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