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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of CrCoOsTiMdNoLrPaUN2EuSmPmUupVSrCl2Rn2P2 is 3054.2390 g/mol

Convert between CrCoOsTiMdNoLrPaUN2EuSmPmUupVSrCl2Rn2P2 weight and moles
CompoundMolesWeight, g
CrCoOsTiMdNoLrPaUN2EuSmPmUupVSrCl2Rn2P2

Elemental composition of CrCoOsTiMdNoLrPaUN2EuSmPmUupVSrCl2Rn2P2
ElementSymbolAtomic weightAtomsMass percent
ChromiumCr51.996111.7024
CobaltCo58.93319511.9296
OsmiumOs190.2316.2284
TitaniumTi47.86711.5672
MendeleviumMd258.09843118.4505
NobeliumNo259.101018.4833
LawrenciumLr262.109618.5818
ProtactiniumPa231.0358817.5644
UraniumU238.0289117.7934
NitrogenN14.006720.9172
EuropiumEu151.96414.9755
SamariumSm150.3614.9230
PromethiumPm144.91274914.7446
MoscoviumUup288.192519.4358
VanadiumV50.941511.6679
StrontiumSr87.6212.8688
ChlorineCl35.45322.3216
RadonRn210.990601213.8162
PhosphorusP30.97376222.0282

Computing molar mass step by step

First, compute the number of each atom in CrCoOsTiMdNoLrPaUN2EuSmPmUupVSrCl2Rn2P2:
Cr: 1, Co: 1, Os: 1, Ti: 1, Md: 1, No: 1, Lr: 1, Pa: 1, U: 1, N: 2, Eu: 1, Sm: 1, Pm: 1, Uup: 1, V: 1, Sr: 1, Cl: 2, Rn: 2, P: 2

Then, lookup atomic weights for each element in periodic table:
Cr: 51.9961, Co: 58.933195, Os: 190.23, Ti: 47.867, Md: 258.098431, No: 259.10103, Lr: 262.10963, Pa: 231.03588, U: 238.02891, N: 14.0067, Eu: 151.964, Sm: 150.36, Pm: 144.912749, Uup: 288.19249, V: 50.9415, Sr: 87.62, Cl: 35.453, Rn: 210.990601, P: 30.973762

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (CrCoOsTiMdNoLrPaUN2EuSmPmUupVSrCl2Rn2P2) = ∑ Counti * Weighti =
Count(Cr) * Weight(Cr) + Count(Co) * Weight(Co) + Count(Os) * Weight(Os) + Count(Ti) * Weight(Ti) + Count(Md) * Weight(Md) + Count(No) * Weight(No) + Count(Lr) * Weight(Lr) + Count(Pa) * Weight(Pa) + Count(U) * Weight(U) + Count(N) * Weight(N) + Count(Eu) * Weight(Eu) + Count(Sm) * Weight(Sm) + Count(Pm) * Weight(Pm) + Count(Uup) * Weight(Uup) + Count(V) * Weight(V) + Count(Sr) * Weight(Sr) + Count(Cl) * Weight(Cl) + Count(Rn) * Weight(Rn) + Count(P) * Weight(P) =
1 * 51.9961 + 1 * 58.933195 + 1 * 190.23 + 1 * 47.867 + 1 * 258.098431 + 1 * 259.10103 + 1 * 262.10963 + 1 * 231.03588 + 1 * 238.02891 + 2 * 14.0067 + 1 * 151.964 + 1 * 150.36 + 1 * 144.912749 + 1 * 288.19249 + 1 * 50.9415 + 1 * 87.62 + 2 * 35.453 + 2 * 210.990601 + 2 * 30.973762 =
3054.2390 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is Cl2CoCrEuLrMdN2NoOsP2PaPmRn2SmSrTiUUupV

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, 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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