C2H2O8S2 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of C₂H₂O₈S₂ is 218.1625 g/mol

Convert between C₂H₂O₈S₂ weight and moles

Compound	Moles		Weight, g
C₂H₂O₈S₂

Elemental composition of C₂H₂O₈S₂

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	2	11.0108
Hydrogen	H	1.00794	2	0.9240
Oxygen	O	15.9994	8	58.6697
Sulfur	S	32.065	2	29.3955

Computing molar mass step by step
First, compute the number of each atom in C₂H₂O₈S₂: C: 2, H: 2, O: 8, S: 2 Then, lookup atomic weights for each element in periodic table: C: 12.0107, H: 1.00794, O: 15.9994, S: 32.065 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₂H₂O₈S₂) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(S) * Weight(S) = 2 * 12.0107 + 2 * 1.00794 + 8 * 15.9994 + 2 * 32.065 = 218.1625 g/mol

Mass percent composition	Atomic percent composition

Related compounds

Formula	Compound name
CH₂OS	Sulfine
C₂H₆OS	Dmso
C₂H₆SO	2-Mercaptoethanol
CH₄O₄S	Methyl bisulfate
CH₂SO₂	Sulfene
C₅H₆SO	Furan-2-ylmethanethiol
C₄H₈OS	Methional
C₅H₄OS	Thiophene-2-carboxaldehyde
C₇H₈OS	Methyl phenyl sulfoxide
C₂H₄SO	Ethylene episulfoxide

Formula in Hill system is C₂H₂O₈S₂

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

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.
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).
Calculate molar mass of each element: multiply the atomic mass of each element by the number of atoms of that element in the compound.
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.

molecular weights calculated today

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