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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of I4C2H2F3K2Y2V4P4N1O3B2U3S2W5Fe2Bi1Ga4He6Li8Ne7Sn3Lv3Lr2Np3Y1 is 5453.1221 g/mol

Convert between I4C2H2F3K2Y2V4P4N1O3B2U3S2W5Fe2Bi1Ga4He6Li8Ne7Sn3Lv3Lr2Np3Y1 weight and moles
CompoundMolesWeight, g
I4C2H2F3K2Y2V4P4N1O3B2U3S2W5Fe2Bi1Ga4He6Li8Ne7Sn3Lv3Lr2Np3Y1

Elemental composition of I4C2H2F3K2Y2V4P4N1O3B2U3S2W5Fe2Bi1Ga4He6Li8Ne7Sn3Lv3Lr2Np3Y1
ElementSymbolAtomic weightAtomsMass percent
IodineI126.9044749.3088
CarbonC12.010720.4405
HydrogenH1.0079420.0370
FluorineF18.998403231.0452
PotassiumK39.098321.4340
YttriumY88.9058534.8911
VanadiumV50.941543.7367
PhosphorusP30.97376242.2720
NitrogenN14.006710.2569
OxygenO15.999430.8802
BoronB10.81120.3965
UraniumU238.02891313.0950
SulfurS32.06521.1760
TungstenW183.84516.8564
IronFe55.84522.0482
BismuthBi208.9804013.8323
GalliumGa69.72345.1144
HeliumHe4.00260260.4404
LithiumLi6.94181.0183
NeonNe20.179772.5904
TinSn118.71036.5308
LivermoriumLv0.000000030.0000
LawrenciumLr262.109629.6132
NeptuniumNp236.04657312.9860

Computing molar mass step by step

First, compute the number of each atom in I4C2H2F3K2Y2V4P4N1O3B2U3S2W5Fe2Bi1Ga4He6Li8Ne7Sn3Lv3Lr2Np3Y1:
I: 4, C: 2, H: 2, F: 3, K: 2, Y: 3, V: 4, P: 4, N: 1, O: 3, B: 2, U: 3, S: 2, W: 5, Fe: 2, Bi: 1, Ga: 4, He: 6, Li: 8, Ne: 7, Sn: 3, Lv: 3, Lr: 2, Np: 3

Then, lookup atomic weights for each element in periodic table:
I: 126.90447, C: 12.0107, H: 1.00794, F: 18.9984032, K: 39.0983, Y: 88.90585, V: 50.9415, P: 30.973762, N: 14.0067, O: 15.9994, B: 10.811, U: 238.02891, S: 32.065, W: 183.84, Fe: 55.845, Bi: 208.9804, Ga: 69.723, He: 4.002602, Li: 6.941, Ne: 20.1797, Sn: 118.71, Lv: 0, Lr: 262.10963, Np: 236.04657

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (I4C2H2F3K2Y2V4P4N1O3B2U3S2W5Fe2Bi1Ga4He6Li8Ne7Sn3Lv3Lr2Np3Y1) = ∑ Counti * Weighti =
Count(I) * Weight(I) + Count(C) * Weight(C) + Count(H) * Weight(H) + Count(F) * Weight(F) + Count(K) * Weight(K) + Count(Y) * Weight(Y) + Count(V) * Weight(V) + Count(P) * Weight(P) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(B) * Weight(B) + Count(U) * Weight(U) + Count(S) * Weight(S) + Count(W) * Weight(W) + Count(Fe) * Weight(Fe) + Count(Bi) * Weight(Bi) + Count(Ga) * Weight(Ga) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Ne) * Weight(Ne) + Count(Sn) * Weight(Sn) + Count(Lv) * Weight(Lv) + Count(Lr) * Weight(Lr) + Count(Np) * Weight(Np) =
4 * 126.90447 + 2 * 12.0107 + 2 * 1.00794 + 3 * 18.9984032 + 2 * 39.0983 + 3 * 88.90585 + 4 * 50.9415 + 4 * 30.973762 + 1 * 14.0067 + 3 * 15.9994 + 2 * 10.811 + 3 * 238.02891 + 2 * 32.065 + 5 * 183.84 + 2 * 55.845 + 1 * 208.9804 + 4 * 69.723 + 6 * 4.002602 + 8 * 6.941 + 7 * 20.1797 + 3 * 118.71 + 3 * 0 + 2 * 262.10963 + 3 * 236.04657 =
5453.1221 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C2H2B2BiF3Fe2Ga4He6I4K2Li8Lr2Lv3NNe7Np3O3P4S2Sn3U3V4W5Y3

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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