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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H1Li1Be1Na1Mg1K1Ca1SC1Ti1V1Cr1Mn1Fe1CO1NI1CU1Zn1Ga1Al1B1C1N1 is 1066.9694 g/mol

Convert between H1Li1Be1Na1Mg1K1Ca1SC1Ti1V1Cr1Mn1Fe1CO1NI1CU1Zn1Ga1Al1B1C1N1 weight and moles
CompoundMolesWeight, g
H1Li1Be1Na1Mg1K1Ca1SC1Ti1V1Cr1Mn1Fe1CO1NI1CU1Zn1Ga1Al1B1C1N1

Elemental composition of H1Li1Be1Na1Mg1K1Ca1SC1Ti1V1Cr1Mn1Fe1CO1NI1CU1Zn1Ga1Al1B1C1N1
ElementSymbolAtomic weightAtomsMass percent
HydrogenH1.0079410.0945
LithiumLi6.94110.6505
BerylliumBe9.01218210.8447
SodiumNa22.9897692812.1547
MagnesiumMg24.305012.2779
PotassiumK39.098313.6644
CalciumCa40.07813.7562
SulfurS32.06513.0052
CarbonC12.010744.5027
TitaniumTi47.86714.4863
VanadiumV50.941514.7744
ChromiumCr51.996114.8733
ManganeseMn54.93804515.1490
IronFe55.84515.2340
OxygenO15.999411.4995
NitrogenN14.006722.6255
IodineI126.90447111.8939
UraniumU238.02891122.3089
ZincZn65.3816.1276
GalliumGa69.72316.5347
AluminumAl26.981538612.5288
BoronB10.81111.0132

Computing molar mass step by step

First, compute the number of each atom in H1Li1Be1Na1Mg1K1Ca1SC1Ti1V1Cr1Mn1Fe1CO1NI1CU1Zn1Ga1Al1B1C1N1:
H: 1, Li: 1, Be: 1, Na: 1, Mg: 1, K: 1, Ca: 1, S: 1, C: 4, Ti: 1, V: 1, Cr: 1, Mn: 1, Fe: 1, O: 1, N: 2, I: 1, U: 1, Zn: 1, Ga: 1, Al: 1, B: 1

Then, lookup atomic weights for each element in periodic table:
H: 1.00794, Li: 6.941, Be: 9.012182, Na: 22.98976928, Mg: 24.305, K: 39.0983, Ca: 40.078, S: 32.065, C: 12.0107, Ti: 47.867, V: 50.9415, Cr: 51.9961, Mn: 54.938045, Fe: 55.845, O: 15.9994, N: 14.0067, I: 126.90447, U: 238.02891, Zn: 65.38, Ga: 69.723, Al: 26.9815386, B: 10.811

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (H1Li1Be1Na1Mg1K1Ca1SC1Ti1V1Cr1Mn1Fe1CO1NI1CU1Zn1Ga1Al1B1C1N1) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(K) * Weight(K) + Count(Ca) * Weight(Ca) + Count(S) * Weight(S) + Count(C) * Weight(C) + Count(Ti) * Weight(Ti) + Count(V) * Weight(V) + Count(Cr) * Weight(Cr) + Count(Mn) * Weight(Mn) + Count(Fe) * Weight(Fe) + Count(O) * Weight(O) + Count(N) * Weight(N) + Count(I) * Weight(I) + Count(U) * Weight(U) + Count(Zn) * Weight(Zn) + Count(Ga) * Weight(Ga) + Count(Al) * Weight(Al) + Count(B) * Weight(B) =
1 * 1.00794 + 1 * 6.941 + 1 * 9.012182 + 1 * 22.98976928 + 1 * 24.305 + 1 * 39.0983 + 1 * 40.078 + 1 * 32.065 + 4 * 12.0107 + 1 * 47.867 + 1 * 50.9415 + 1 * 51.9961 + 1 * 54.938045 + 1 * 55.845 + 1 * 15.9994 + 2 * 14.0067 + 1 * 126.90447 + 1 * 238.02891 + 1 * 65.38 + 1 * 69.723 + 1 * 26.9815386 + 1 * 10.811 =
1066.9694 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is C4HAlBBeCaCrFeGaIKLiMgMnN2NaOSTiUVZn

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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