Hg98As4PB8Cd91Cr4NI96At100283U56PU98NP455CeIO137Og17383 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Hg₉₈As₄PB₈Cd₉₁Cr₄NI₉₆At₁₀₀₂₈₃U₅₆PU₉₈NP₄₅₅CeIO₁₃₇Og₁₇₃₈₃ is 21154103.7848 g/mol

Convert between Hg₉₈As₄PB₈Cd₉₁Cr₄NI₉₆At₁₀₀₂₈₃U₅₆PU₉₈NP₄₅₅CeIO₁₃₇Og₁₇₃₈₃ weight and moles

Compound	Moles		Weight, g
Hg₉₈As₄PB₈Cd₉₁Cr₄NI₉₆At₁₀₀₂₈₃U₅₆PU₉₈NP₄₅₅CeIO₁₃₇Og₁₇₃₈₃

Elemental composition of Hg₉₈As₄PB₈Cd₉₁Cr₄NI₉₆At₁₀₀₂₈₃U₅₆PU₉₈NP₄₅₅CeIO₁₃₇Og₁₇₃₈₃

Element	Symbol	Atomic weight	Atoms	Mass percent
Mercury	Hg	200.59	98	0.0929
Arsenic	As	74.92160	4	0.0014
Phosphorus	P	30.973762	457	0.0669
Boron	B	10.811	8	0.0004
Cadmium	Cd	112.411	91	0.0484
Chromium	Cr	51.9961	4	0.0010
Nitrogen	N	14.0067	2	0.0001
Iodine	I	126.90447	97	0.0582
Astatine	At	209.987148	100283	99.5464
Uranium	U	238.02891	154	0.1733
Cerium	Ce	140.116	1	0.0007
Oxygen	O	15.9994	137	0.0104
Oganesson	Og	0.0000000	17383	0.0000

Computing molar mass step by step
First, compute the number of each atom in Hg₉₈As₄PB₈Cd₉₁Cr₄NI₉₆At₁₀₀₂₈₃U₅₆PU₉₈NP₄₅₅CeIO₁₃₇Og₁₇₃₈₃: Hg: 98, As: 4, P: 457, B: 8, Cd: 91, Cr: 4, N: 2, I: 97, At: 100283, U: 154, Ce: 1, O: 137, Og: 17383 Then, lookup atomic weights for each element in periodic table: Hg: 200.59, As: 74.9216, P: 30.973762, B: 10.811, Cd: 112.411, Cr: 51.9961, N: 14.0067, I: 126.90447, At: 209.987148, U: 238.02891, Ce: 140.116, O: 15.9994, Og: 0 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Hg₉₈As₄PB₈Cd₉₁Cr₄NI₉₆At₁₀₀₂₈₃U₅₆PU₉₈NP₄₅₅CeIO₁₃₇Og₁₇₃₈₃) = ∑ Count_i * Weight_i = Count(Hg) * Weight(Hg) + Count(As) * Weight(As) + Count(P) * Weight(P) + Count(B) * Weight(B) + Count(Cd) * Weight(Cd) + Count(Cr) * Weight(Cr) + Count(N) * Weight(N) + Count(I) * Weight(I) + Count(At) * Weight(At) + Count(U) * Weight(U) + Count(Ce) * Weight(Ce) + Count(O) * Weight(O) + Count(Og) * Weight(Og) = 98 * 200.59 + 4 * 74.9216 + 457 * 30.973762 + 8 * 10.811 + 91 * 112.411 + 4 * 51.9961 + 2 * 14.0067 + 97 * 126.90447 + 100283 * 209.987148 + 154 * 238.02891 + 1 * 140.116 + 137 * 15.9994 + 17383 * 0 = 21154103.7848 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is As₄At₁₀₀₂₈₃B₈Cd₉₁CeCr₄Hg₉₈I₉₇N₂O₁₃₇Og₁₇₃₈₃P₄₅₇U₁₅₄

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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