Al201C540O120P30S30Cl120N90H840Pb70W60O240B9Tl3B3F9V21Se17 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Al₂₀₁C₅₄₀O₁₂₀P₃₀S₃₀Cl₁₂₀N₉₀H₈₄₀Pb₇₀W₆₀O₂₄₀B₉Tl₃B₃F₉V₂₁Se₁₇ is 54782.0057 g/mol

Convert between Al₂₀₁C₅₄₀O₁₂₀P₃₀S₃₀Cl₁₂₀N₉₀H₈₄₀Pb₇₀W₆₀O₂₄₀B₉Tl₃B₃F₉V₂₁Se₁₇ weight and moles

Compound	Moles		Weight, g
Al₂₀₁C₅₄₀O₁₂₀P₃₀S₃₀Cl₁₂₀N₉₀H₈₄₀Pb₇₀W₆₀O₂₄₀B₉Tl₃B₃F₉V₂₁Se₁₇

Elemental composition of Al₂₀₁C₅₄₀O₁₂₀P₃₀S₃₀Cl₁₂₀N₉₀H₈₄₀Pb₇₀W₆₀O₂₄₀B₉Tl₃B₃F₉V₂₁Se₁₇

Element	Symbol	Atomic weight	Atoms	Mass percent
Aluminum	Al	26.9815386	201	9.8998
Carbon	C	12.0107	540	11.8392
Oxygen	O	15.9994	360	10.5140
Phosphorus	P	30.973762	30	1.6962
Sulfur	S	32.065	30	1.7560
Chlorine	Cl	35.453	120	7.7660
Nitrogen	N	14.0067	90	2.3011
Hydrogen	H	1.00794	840	1.5455
Lead	Pb	207.2	70	26.4758
Tungsten	W	183.84	60	20.1351
Boron	B	10.811	12	0.2368
Thallium	Tl	204.3833	3	1.1193
Fluorine	F	18.9984032	9	0.3121
Vanadium	V	50.9415	21	1.9528
Selenium	Se	78.96	17	2.4503

Computing molar mass step by step
First, compute the number of each atom in Al₂₀₁C₅₄₀O₁₂₀P₃₀S₃₀Cl₁₂₀N₉₀H₈₄₀Pb₇₀W₆₀O₂₄₀B₉Tl₃B₃F₉V₂₁Se₁₇: Al: 201, C: 540, O: 360, P: 30, S: 30, Cl: 120, N: 90, H: 840, Pb: 70, W: 60, B: 12, Tl: 3, F: 9, V: 21, Se: 17 Then, lookup atomic weights for each element in periodic table: Al: 26.9815386, C: 12.0107, O: 15.9994, P: 30.973762, S: 32.065, Cl: 35.453, N: 14.0067, H: 1.00794, Pb: 207.2, W: 183.84, B: 10.811, Tl: 204.3833, F: 18.9984032, V: 50.9415, Se: 78.96 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Al₂₀₁C₅₄₀O₁₂₀P₃₀S₃₀Cl₁₂₀N₉₀H₈₄₀Pb₇₀W₆₀O₂₄₀B₉Tl₃B₃F₉V₂₁Se₁₇) = ∑ Count_i * Weight_i = Count(Al) * Weight(Al) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Cl) * Weight(Cl) + Count(N) * Weight(N) + Count(H) * Weight(H) + Count(Pb) * Weight(Pb) + Count(W) * Weight(W) + Count(B) * Weight(B) + Count(Tl) * Weight(Tl) + Count(F) * Weight(F) + Count(V) * Weight(V) + Count(Se) * Weight(Se) = 201 * 26.9815386 + 540 * 12.0107 + 360 * 15.9994 + 30 * 30.973762 + 30 * 32.065 + 120 * 35.453 + 90 * 14.0067 + 840 * 1.00794 + 70 * 207.2 + 60 * 183.84 + 12 * 10.811 + 3 * 204.3833 + 9 * 18.9984032 + 21 * 50.9415 + 17 * 78.96 = 54782.0057 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₅₄₀H₈₄₀Al₂₀₁B₁₂Cl₁₂₀F₉N₉₀O₃₆₀P₃₀Pb₇₀S₃₀Se₁₇Tl₃V₂₁W₆₀

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