H100B50C50N50O50F50P50S50KLrHgPoBiTlAtUNoFmEsSb100Pb31W50IRb molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₁₀₀B₅₀C₅₀N₅₀O₅₀F₅₀P₅₀S₅₀KLrHgPoBiTlAtUNoFmEsSb₁₀₀Pb₃₁W₅₀IRb is 37188.0538 g/mol

Convert between H₁₀₀B₅₀C₅₀N₅₀O₅₀F₅₀P₅₀S₅₀KLrHgPoBiTlAtUNoFmEsSb₁₀₀Pb₃₁W₅₀IRb weight and moles

Compound	Moles		Weight, g
H₁₀₀B₅₀C₅₀N₅₀O₅₀F₅₀P₅₀S₅₀KLrHgPoBiTlAtUNoFmEsSb₁₀₀Pb₃₁W₅₀IRb

Elemental composition of H₁₀₀B₅₀C₅₀N₅₀O₅₀F₅₀P₅₀S₅₀KLrHgPoBiTlAtUNoFmEsSb₁₀₀Pb₃₁W₅₀IRb

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	100	0.2710
Boron	B	10.811	50	1.4536
Carbon	C	12.0107	50	1.6149
Nitrogen	N	14.0067	50	1.8832
Oxygen	O	15.9994	50	2.1511
Fluorine	F	18.9984032	50	2.5544
Phosphorus	P	30.973762	50	4.1645
Sulfur	S	32.065	50	4.3112
Potassium	K	39.0983	1	0.1051
Lawrencium	Lr	262.1096	1	0.7048
Mercury	Hg	200.59	1	0.5394
Polonium	Po	208.982430	1	0.5620
Bismuth	Bi	208.98040	1	0.5620
Thallium	Tl	204.3833	1	0.5496
Astatine	At	209.987148	1	0.5647
Uranium	U	238.02891	1	0.6401
Nobelium	No	259.1010	1	0.6967
Fermium	Fm	257.095105	1	0.6913
Einsteinium	Es	252.08298	1	0.6779
Antimony	Sb	121.760	100	32.7417
Lead	Pb	207.2	31	17.2722
Tungsten	W	183.84	50	24.7176
Iodine	I	126.90447	1	0.3413
Rubidium	Rb	85.4678	1	0.2298

Computing molar mass step by step
First, compute the number of each atom in H₁₀₀B₅₀C₅₀N₅₀O₅₀F₅₀P₅₀S₅₀KLrHgPoBiTlAtUNoFmEsSb₁₀₀Pb₃₁W₅₀IRb: H: 100, B: 50, C: 50, N: 50, O: 50, F: 50, P: 50, S: 50, K: 1, Lr: 1, Hg: 1, Po: 1, Bi: 1, Tl: 1, At: 1, U: 1, No: 1, Fm: 1, Es: 1, Sb: 100, Pb: 31, W: 50, I: 1, Rb: 1 Then, lookup atomic weights for each element in periodic table: H: 1.00794, B: 10.811, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, P: 30.973762, S: 32.065, K: 39.0983, Lr: 262.10963, Hg: 200.59, Po: 208.9824304, Bi: 208.9804, Tl: 204.3833, At: 209.987148, U: 238.02891, No: 259.10103, Fm: 257.095105, Es: 252.08298, Sb: 121.76, Pb: 207.2, W: 183.84, I: 126.90447, Rb: 85.4678 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₁₀₀B₅₀C₅₀N₅₀O₅₀F₅₀P₅₀S₅₀KLrHgPoBiTlAtUNoFmEsSb₁₀₀Pb₃₁W₅₀IRb) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(B) * Weight(B) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(K) * Weight(K) + Count(Lr) * Weight(Lr) + Count(Hg) * Weight(Hg) + Count(Po) * Weight(Po) + Count(Bi) * Weight(Bi) + Count(Tl) * Weight(Tl) + Count(At) * Weight(At) + Count(U) * Weight(U) + Count(No) * Weight(No) + Count(Fm) * Weight(Fm) + Count(Es) * Weight(Es) + Count(Sb) * Weight(Sb) + Count(Pb) * Weight(Pb) + Count(W) * Weight(W) + Count(I) * Weight(I) + Count(Rb) * Weight(Rb) = 100 * 1.00794 + 50 * 10.811 + 50 * 12.0107 + 50 * 14.0067 + 50 * 15.9994 + 50 * 18.9984032 + 50 * 30.973762 + 50 * 32.065 + 1 * 39.0983 + 1 * 262.10963 + 1 * 200.59 + 1 * 208.9824304 + 1 * 208.9804 + 1 * 204.3833 + 1 * 209.987148 + 1 * 238.02891 + 1 * 259.10103 + 1 * 257.095105 + 1 * 252.08298 + 100 * 121.76 + 31 * 207.2 + 50 * 183.84 + 1 * 126.90447 + 1 * 85.4678 = 37188.0538 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₅₀H₁₀₀AtB₅₀BiEsF₅₀FmHgIKLrN₅₀NoO₅₀P₅₀Pb₃₁PoRbS₅₀Sb₁₀₀TlUW₅₀

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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