#### Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Hg2Cl2 is 472.0860 g/mol
Compound name is mercury(i) chloride

Convert between Hg2Cl2 weight and moles
CompoundMolesWeight, g
Hg2Cl2

Elemental composition of Hg2Cl2
ElementSymbolAtomic weightAtomsMass percent
MercuryHg200.59284.9803
ChlorineCl35.453215.0197

Mass percent compositionAtomic percent composition

Sample reactions for Hg2Cl2
EquationReaction type
Hg2Cl2 + SnCl2 = Hg + SnCl4double replacement
Hg2Cl2 + HI = Hg2I2 + HCldouble replacement

Formula in Hill system is Cl2Hg2

### 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, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
• parantesis () or brackets [].
• Common compound names.
Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, water, nitric acid, potassium permanganate, ethanol, fructose.

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 of molecular mass, molecular weight, molar mass and molar weight

• 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.
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.