U1C81I9O18P6N15Se3Sb3F3Xe3Lr3Cs9S3H72 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of U₁C₈₁I₉O₁₈P₆N₁₅Se₃Sb₃F₃Xe₃Lr₃Cs₉S₃H₇₂ is 6241.2470 g/mol

Convert between U₁C₈₁I₉O₁₈P₆N₁₅Se₃Sb₃F₃Xe₃Lr₃Cs₉S₃H₇₂ weight and moles

Compound	Moles		Weight, g
U₁C₈₁I₉O₁₈P₆N₁₅Se₃Sb₃F₃Xe₃Lr₃Cs₉S₃H₇₂

Elemental composition of U₁C₈₁I₉O₁₈P₆N₁₅Se₃Sb₃F₃Xe₃Lr₃Cs₉S₃H₇₂

Element	Symbol	Atomic weight	Atoms	Mass percent
Uranium	U	238.02891	1	3.8138
Carbon	C	12.0107	81	15.5877
Iodine	I	126.90447	9	18.2999
Oxygen	O	15.9994	18	4.6143
Phosphorus	P	30.973762	6	2.9777
Nitrogen	N	14.0067	15	3.3663
Selenium	Se	78.96	3	3.7954
Antimony	Sb	121.760	3	5.8527
Fluorine	F	18.9984032	3	0.9132
Xenon	Xe	131.293	3	6.3109
Lawrencium	Lr	262.1096	3	12.5989
Cesium	Cs	132.9054519	9	19.1652
Sulfur	S	32.065	3	1.5413
Hydrogen	H	1.00794	72	1.1628

Computing molar mass step by step
First, compute the number of each atom in U₁C₈₁I₉O₁₈P₆N₁₅Se₃Sb₃F₃Xe₃Lr₃Cs₉S₃H₇₂: U: 1, C: 81, I: 9, O: 18, P: 6, N: 15, Se: 3, Sb: 3, F: 3, Xe: 3, Lr: 3, Cs: 9, S: 3, H: 72 Then, lookup atomic weights for each element in periodic table: U: 238.02891, C: 12.0107, I: 126.90447, O: 15.9994, P: 30.973762, N: 14.0067, Se: 78.96, Sb: 121.76, F: 18.9984032, Xe: 131.293, Lr: 262.10963, Cs: 132.9054519, S: 32.065, H: 1.00794 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (U₁C₈₁I₉O₁₈P₆N₁₅Se₃Sb₃F₃Xe₃Lr₃Cs₉S₃H₇₂) = ∑ Count_i * Weight_i = Count(U) * Weight(U) + Count(C) * Weight(C) + Count(I) * Weight(I) + Count(O) * Weight(O) + Count(P) * Weight(P) + Count(N) * Weight(N) + Count(Se) * Weight(Se) + Count(Sb) * Weight(Sb) + Count(F) * Weight(F) + Count(Xe) * Weight(Xe) + Count(Lr) * Weight(Lr) + Count(Cs) * Weight(Cs) + Count(S) * Weight(S) + Count(H) * Weight(H) = 1 * 238.02891 + 81 * 12.0107 + 9 * 126.90447 + 18 * 15.9994 + 6 * 30.973762 + 15 * 14.0067 + 3 * 78.96 + 3 * 121.76 + 3 * 18.9984032 + 3 * 131.293 + 3 * 262.10963 + 9 * 132.9054519 + 3 * 32.065 + 72 * 1.00794 = 6241.2470 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₈₁H₇₂Cs₉F₃I₉Lr₃N₁₅O₁₈P₆S₃Sb₃Se₃UXe₃

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, 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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