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Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of No3In2Mg((C5H8O2)H4OI2)*3PuHg2Cl6PoNi is 4764.0702 g/mol

Convert between No3In2Mg((C5H8O2)H4OI2)*3PuHg2Cl6PoNi weight and moles
CompoundMolesWeight, g
No3In2Mg((C5H8O2)H4OI2)*3PuHg2Cl6PoNi

Elemental composition of No3In2Mg((C5H8O2)H4OI2)*3PuHg2Cl6PoNi
ElementSymbolAtomic weightAtomsMass percent
NobeliumNo259.1010316.3159
IndiumIn114.81824.8202
MagnesiumMg24.305010.5102
PlutoniumPu238.049560314.9903
MercuryHg200.59625.2629
ChlorineCl35.4531813.3951
PoloniumPo208.982430313.1599
NickelNi58.693433.6960
HydrogenH1.00794120.2539
OxygenO15.999431.0075
IodineI126.9044725.3276
CarbonC12.010751.2606

Computing molar mass step by step

First, compute the number of each atom in No3In2Mg((C5H8O2)H4OI2)*3PuHg2Cl6PoNi:
No: 3, In: 2, Mg: 1, Pu: 3, Hg: 6, Cl: 18, Po: 3, Ni: 3, H: 12, O: 3, I: 2, C: 5

Then, lookup atomic weights for each element in periodic table:
No: 259.10103, In: 114.818, Mg: 24.305, Pu: 238.0495599, Hg: 200.59, Cl: 35.453, Po: 208.9824304, Ni: 58.6934, H: 1.00794, O: 15.9994, I: 126.90447, C: 12.0107

Now, compute the sum of products of number of atoms to the atomic weight:
Molar mass (No3In2Mg((C5H8O2)H4OI2)*3PuHg2Cl6PoNi) = ∑ Counti * Weighti =
Count(No) * Weight(No) + Count(In) * Weight(In) + Count(Mg) * Weight(Mg) + Count(Pu) * Weight(Pu) + Count(Hg) * Weight(Hg) + Count(Cl) * Weight(Cl) + Count(Po) * Weight(Po) + Count(Ni) * Weight(Ni) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(I) * Weight(I) + Count(C) * Weight(C) =
3 * 259.10103 + 2 * 114.818 + 1 * 24.305 + 3 * 238.0495599 + 6 * 200.59 + 18 * 35.453 + 3 * 208.9824304 + 3 * 58.6934 + 12 * 1.00794 + 3 * 15.9994 + 2 * 126.90447 + 5 * 12.0107 =
4764.0702 g/mol


Mass Percent CompositionAtomic Percent Composition
No: 16.32%In: 4.82%Mg: 0.51%Pu: 14.99%Hg: 25.26%Cl: 13.40%Po: 13.16%Ni: 3.70%O: 1.01%I: 5.33%C: 1.26%
No Nobelium (16.32%)
In Indium (4.82%)
Mg Magnesium (0.51%)
Pu Plutonium (14.99%)
Hg Mercury (25.26%)
Cl Chlorine (13.40%)
Po Polonium (13.16%)
Ni Nickel (3.70%)
O Oxygen (1.01%)
I Iodine (5.33%)
C Carbon (1.26%)
No: 4.92%In: 3.28%Mg: 1.64%Pu: 4.92%Hg: 9.84%Cl: 29.51%Po: 4.92%Ni: 4.92%H: 19.67%O: 4.92%I: 3.28%C: 8.20%
No Nobelium (4.92%)
In Indium (3.28%)
Mg Magnesium (1.64%)
Pu Plutonium (4.92%)
Hg Mercury (9.84%)
Cl Chlorine (29.51%)
Po Polonium (4.92%)
Ni Nickel (4.92%)
H Hydrogen (19.67%)
O Oxygen (4.92%)
I Iodine (3.28%)
C Carbon (8.20%)
Mass Percent Composition
No: 16.32%In: 4.82%Mg: 0.51%Pu: 14.99%Hg: 25.26%Cl: 13.40%Po: 13.16%Ni: 3.70%O: 1.01%I: 5.33%C: 1.26%
No Nobelium (16.32%)
In Indium (4.82%)
Mg Magnesium (0.51%)
Pu Plutonium (14.99%)
Hg Mercury (25.26%)
Cl Chlorine (13.40%)
Po Polonium (13.16%)
Ni Nickel (3.70%)
O Oxygen (1.01%)
I Iodine (5.33%)
C Carbon (1.26%)
Atomic Percent Composition
No: 4.92%In: 3.28%Mg: 1.64%Pu: 4.92%Hg: 9.84%Cl: 29.51%Po: 4.92%Ni: 4.92%H: 19.67%O: 4.92%I: 3.28%C: 8.20%
No Nobelium (4.92%)
In Indium (3.28%)
Mg Magnesium (1.64%)
Pu Plutonium (4.92%)
Hg Mercury (9.84%)
Cl Chlorine (29.51%)
Po Polonium (4.92%)
Ni Nickel (4.92%)
H Hydrogen (19.67%)
O Oxygen (4.92%)
I Iodine (3.28%)
C Carbon (8.20%)

Related
Oxidation state calculator
Compound properties

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

  1. 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.
  2. 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).
  3. Calculate molar mass of each element: multiply the atomic mass of each element by the number of atoms of that element in the compound.
  4. 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

Practice what you learned:

Weights of atoms and isotopes are from NIST article.

Related: Molecular weights of amino acids

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