Printed from https://www.webqc.org

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Bi64Os64Pb2TlHg2Au4Pt8Ir16Re32W8Ta32U16Pa8Th4Ba2Cs is 52205.5766 g/mol

Convert between Bi64Os64Pb2TlHg2Au4Pt8Ir16Re32W8Ta32U16Pa8Th4Ba2Cs weight and moles
CompoundMolesWeight, g
Bi64Os64Pb2TlHg2Au4Pt8Ir16Re32W8Ta32U16Pa8Th4Ba2Cs

Elemental composition of Bi64Os64Pb2TlHg2Au4Pt8Ir16Re32W8Ta32U16Pa8Th4Ba2Cs
ElementSymbolAtomic weightAtomsMass percent
BismuthBi208.980406425.6194
OsmiumOs190.236423.3207
LeadPb207.220.7938
ThalliumTl204.383310.3915
MercuryHg200.5920.7685
GoldAu196.96656941.5092
PlatinumPt195.08482.9895
IridiumIr192.217165.8911
RheniumRe186.2073211.4138
TungstenW183.8482.8172
TantalumTa180.947883211.0914
UraniumU238.02891167.2951
ProtactiniumPa231.0358883.5404
ThoriumTh232.0380641.7779
BariumBa137.32720.5261
CesiumCs132.905451910.2546

Computing molar mass step by step

First, compute the number of each atom in Bi64Os64Pb2TlHg2Au4Pt8Ir16Re32W8Ta32U16Pa8Th4Ba2Cs:
Bi: 64, Os: 64, Pb: 2, Tl: 1, Hg: 2, Au: 4, Pt: 8, Ir: 16, Re: 32, W: 8, Ta: 32, U: 16, Pa: 8, Th: 4, Ba: 2, Cs: 1

Then, lookup atomic weights for each element in periodic table:
Bi: 208.9804, Os: 190.23, Pb: 207.2, Tl: 204.3833, Hg: 200.59, Au: 196.966569, Pt: 195.084, Ir: 192.217, Re: 186.207, W: 183.84, Ta: 180.94788, U: 238.02891, Pa: 231.03588, Th: 232.03806, Ba: 137.327, Cs: 132.9054519

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (Bi64Os64Pb2TlHg2Au4Pt8Ir16Re32W8Ta32U16Pa8Th4Ba2Cs) = ∑ Counti * Weighti =
Count(Bi) * Weight(Bi) + Count(Os) * Weight(Os) + Count(Pb) * Weight(Pb) + Count(Tl) * Weight(Tl) + Count(Hg) * Weight(Hg) + Count(Au) * Weight(Au) + Count(Pt) * Weight(Pt) + Count(Ir) * Weight(Ir) + Count(Re) * Weight(Re) + Count(W) * Weight(W) + Count(Ta) * Weight(Ta) + Count(U) * Weight(U) + Count(Pa) * Weight(Pa) + Count(Th) * Weight(Th) + Count(Ba) * Weight(Ba) + Count(Cs) * Weight(Cs) =
64 * 208.9804 + 64 * 190.23 + 2 * 207.2 + 1 * 204.3833 + 2 * 200.59 + 4 * 196.966569 + 8 * 195.084 + 16 * 192.217 + 32 * 186.207 + 8 * 183.84 + 32 * 180.94788 + 16 * 238.02891 + 8 * 231.03588 + 4 * 232.03806 + 2 * 137.327 + 1 * 132.9054519 =
52205.5766 g/mol


Mass percent compositionAtomic percent composition

Formula in Hill system is Au4Ba2Bi64CsHg2Ir16Os64Pa8Pb2Pt8Re32Ta32Th4TlU16W8

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
Please let us know how we can improve this web app.
Menu Balance Molar mass Gas laws Units Chemistry tools Periodic table Chemical forum Symmetry Constants Contribute Contact us
How to cite?
Choose languageDeutschEnglishEspañolFrançaisItalianoNederlandsPolskiPortuguêsРусский中文日本語한국어