C18H22N4S2O2 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of C₁₈H₂₂N₄S₂O₂ is 390.5229 g/mol

Convert between C₁₈H₂₂N₄S₂O₂ weight and moles

Compound	Moles		Weight, g
C₁₈H₂₂N₄S₂O₂

Elemental composition of C₁₈H₂₂N₄S₂O₂

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	18	55.3598
Hydrogen	H	1.00794	22	5.6782
Nitrogen	N	14.0067	4	14.3466
Sulfur	S	32.065	2	16.4216
Oxygen	O	15.9994	2	8.1938

Computing molar mass step by step
First, compute the number of each atom in C₁₈H₂₂N₄S₂O₂: C: 18, H: 22, N: 4, S: 2, O: 2 Then, lookup atomic weights for each element in periodic table: C: 12.0107, H: 1.00794, N: 14.0067, S: 32.065, O: 15.9994 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₁₈H₂₂N₄S₂O₂) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(H) * Weight(H) + Count(N) * Weight(N) + Count(S) * Weight(S) + Count(O) * Weight(O) = 18 * 12.0107 + 22 * 1.00794 + 4 * 14.0067 + 2 * 32.065 + 2 * 15.9994 = 390.5229 g/mol

Mass percent composition	Atomic percent composition

Related compounds

Formula	Compound name
C₅H₇NOS	Penam
C₃H₃NOS	Isothiazolinone
C₂HNO₂S	Oxathiazolones
C₆H₅NSO	N-Sulfinylaniline
C₉H₉NOS	Asmic
C₄H₅NOS	Methylisothiazolinone
C₇H₅NOS	Benzisothiazolinone
C₅H₅NOS	Pyrithione
C₃H₇NO₂S	Cysteine
C₇H₅NO₃S	Saccharin

Formula in Hill system is C₁₈H₂₂N₄O₂S₂

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

Please let us know how we can improve this web app.

How to cite?

Choose languageDeutschEnglishEspañol Français Italiano Nederlands Polski Português Русский 中文日本語 한국어