C5H4O2S3P2Re7Fe4U7He90Ga5Y2W80BI4Zn89As123Mg7 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of C₅H₄O₂S₃P₂Re₇Fe₄U₇He₉₀Ga₅Y₂W₈₀BI₄Zn₈₉As₁₂₃Mg₇ is 34763.8595 g/mol

Convert between C₅H₄O₂S₃P₂Re₇Fe₄U₇He₉₀Ga₅Y₂W₈₀BI₄Zn₈₉As₁₂₃Mg₇ weight and moles

Compound	Moles		Weight, g
C₅H₄O₂S₃P₂Re₇Fe₄U₇He₉₀Ga₅Y₂W₈₀BI₄Zn₈₉As₁₂₃Mg₇

Elemental composition of C₅H₄O₂S₃P₂Re₇Fe₄U₇He₉₀Ga₅Y₂W₈₀BI₄Zn₈₉As₁₂₃Mg₇

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	5	0.1727
Hydrogen	H	1.00794	4	0.0116
Oxygen	O	15.9994	2	0.0920
Sulfur	S	32.065	3	0.2767
Phosphorus	P	30.973762	2	0.1782
Rhenium	Re	186.207	7	3.7494
Iron	Fe	55.845	4	0.6426
Uranium	U	238.02891	7	4.7929
Helium	He	4.002602	90	1.0362
Gallium	Ga	69.723	5	1.0028
Yttrium	Y	88.90585	2	0.5115
Tungsten	W	183.84	80	42.3060
Boron	B	10.811	1	0.0311
Iodine	I	126.90447	4	1.4602
Zinc	Zn	65.38	89	16.7381
Arsenic	As	74.92160	123	26.5084
Magnesium	Mg	24.3050	7	0.4894

Computing molar mass step by step
First, compute the number of each atom in C₅H₄O₂S₃P₂Re₇Fe₄U₇He₉₀Ga₅Y₂W₈₀BI₄Zn₈₉As₁₂₃Mg₇: C: 5, H: 4, O: 2, S: 3, P: 2, Re: 7, Fe: 4, U: 7, He: 90, Ga: 5, Y: 2, W: 80, B: 1, I: 4, Zn: 89, As: 123, Mg: 7 Then, lookup atomic weights for each element in periodic table: C: 12.0107, H: 1.00794, O: 15.9994, S: 32.065, P: 30.973762, Re: 186.207, Fe: 55.845, U: 238.02891, He: 4.002602, Ga: 69.723, Y: 88.90585, W: 183.84, B: 10.811, I: 126.90447, Zn: 65.38, As: 74.9216, Mg: 24.305 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₅H₄O₂S₃P₂Re₇Fe₄U₇He₉₀Ga₅Y₂W₈₀BI₄Zn₈₉As₁₂₃Mg₇) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(S) * Weight(S) + Count(P) * Weight(P) + Count(Re) * Weight(Re) + Count(Fe) * Weight(Fe) + Count(U) * Weight(U) + Count(He) * Weight(He) + Count(Ga) * Weight(Ga) + Count(Y) * Weight(Y) + Count(W) * Weight(W) + Count(B) * Weight(B) + Count(I) * Weight(I) + Count(Zn) * Weight(Zn) + Count(As) * Weight(As) + Count(Mg) * Weight(Mg) = 5 * 12.0107 + 4 * 1.00794 + 2 * 15.9994 + 3 * 32.065 + 2 * 30.973762 + 7 * 186.207 + 4 * 55.845 + 7 * 238.02891 + 90 * 4.002602 + 5 * 69.723 + 2 * 88.90585 + 80 * 183.84 + 1 * 10.811 + 4 * 126.90447 + 89 * 65.38 + 123 * 74.9216 + 7 * 24.305 = 34763.8595 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₅H₄As₁₂₃BFe₄Ga₅He₉₀I₄Mg₇O₂P₂Re₇S₃U₇W₈₀Y₂Zn₈₉

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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