H2C5O3P7S11Ar5Sc2Ti5Cu13Zn9I5Ac3Rn7AmCm115Ag56Au77He4893U999 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₂C₅O₃P₇S₁₁Ar₅Sc₂Ti₅Cu₁₃Zn₉I₅Ac₃Rn₇AmCm₁₁₅Ag₅₆Au₇₇He₄₈₉₃U₉₉₉ is 312191.4178 g/mol

Convert between H₂C₅O₃P₇S₁₁Ar₅Sc₂Ti₅Cu₁₃Zn₉I₅Ac₃Rn₇AmCm₁₁₅Ag₅₆Au₇₇He₄₈₉₃U₉₉₉ weight and moles

Compound	Moles		Weight, g
H₂C₅O₃P₇S₁₁Ar₅Sc₂Ti₅Cu₁₃Zn₉I₅Ac₃Rn₇AmCm₁₁₅Ag₅₆Au₇₇He₄₈₉₃U₉₉₉

Elemental composition of H₂C₅O₃P₇S₁₁Ar₅Sc₂Ti₅Cu₁₃Zn₉I₅Ac₃Rn₇AmCm₁₁₅Ag₅₆Au₇₇He₄₈₉₃U₉₉₉

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	2	0.0006
Carbon	C	12.0107	5	0.0192
Oxygen	O	15.9994	3	0.0154
Phosphorus	P	30.973762	7	0.0694
Sulfur	S	32.065	11	0.1130
Argon	Ar	39.948	5	0.0640
Scandium	Sc	44.955912	2	0.0288
Titanium	Ti	47.867	5	0.0767
Copper	Cu	63.546	13	0.2646
Zinc	Zn	65.38	9	0.1885
Iodine	I	126.90447	5	0.2032
Actinium	Ac	227.027752	3	0.2182
Radon	Rn	210.990601	7	0.4731
Americium	Am	241.056829	1	0.0772
Curium	Cm	243.061389	115	8.9535
Silver	Ag	107.8682	56	1.9349
Gold	Au	196.966569	77	4.8581
Helium	He	4.002602	4893	6.2733
Uranium	U	238.02891	999	76.1683

Computing molar mass step by step
First, compute the number of each atom in H₂C₅O₃P₇S₁₁Ar₅Sc₂Ti₅Cu₁₃Zn₉I₅Ac₃Rn₇AmCm₁₁₅Ag₅₆Au₇₇He₄₈₉₃U₉₉₉: H: 2, C: 5, O: 3, P: 7, S: 11, Ar: 5, Sc: 2, Ti: 5, Cu: 13, Zn: 9, I: 5, Ac: 3, Rn: 7, Am: 1, Cm: 115, Ag: 56, Au: 77, He: 4893, U: 999 Then, lookup atomic weights for each element in periodic table: H: 1.00794, C: 12.0107, O: 15.9994, P: 30.973762, S: 32.065, Ar: 39.948, Sc: 44.955912, Ti: 47.867, Cu: 63.546, Zn: 65.38, I: 126.90447, Ac: 227.0277521, Rn: 210.990601, Am: 241.0568291, Cm: 243.0613891, Ag: 107.8682, Au: 196.966569, He: 4.002602, U: 238.02891 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₂C₅O₃P₇S₁₁Ar₅Sc₂Ti₅Cu₁₃Zn₉I₅Ac₃Rn₇AmCm₁₁₅Ag₅₆Au₇₇He₄₈₉₃U₉₉₉) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Ar) * Weight(Ar) + Count(Sc) * Weight(Sc) + Count(Ti) * Weight(Ti) + Count(Cu) * Weight(Cu) + Count(Zn) * Weight(Zn) + Count(I) * Weight(I) + Count(Ac) * Weight(Ac) + Count(Rn) * Weight(Rn) + Count(Am) * Weight(Am) + Count(Cm) * Weight(Cm) + Count(Ag) * Weight(Ag) + Count(Au) * Weight(Au) + Count(He) * Weight(He) + Count(U) * Weight(U) = 2 * 1.00794 + 5 * 12.0107 + 3 * 15.9994 + 7 * 30.973762 + 11 * 32.065 + 5 * 39.948 + 2 * 44.955912 + 5 * 47.867 + 13 * 63.546 + 9 * 65.38 + 5 * 126.90447 + 3 * 227.0277521 + 7 * 210.990601 + 1 * 241.0568291 + 115 * 243.0613891 + 56 * 107.8682 + 77 * 196.966569 + 4893 * 4.002602 + 999 * 238.02891 = 312191.4178 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₅H₂Ac₃Ag₅₆AmAr₅Au₇₇Cm₁₁₅Cu₁₃He₄₈₉₃I₅O₃P₇Rn₇S₁₁Sc₂Ti₅U₉₉₉Zn₉

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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