Cr4Mn5Fe4Co7Ni6Cu5Zn4Ga3Ge2As4Se4Br5Kr6Rb4Sr3Y3Zr3Nb5Mo8Tc6 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Cr₄Mn₅Fe₄Co₇Ni₆Cu₅Zn₄Ga₃Ge₂As₄Se₄Br₅Kr₆Rb₄Sr₃Y₃Zr₃Nb₅Mo₈Tc₆ is 6881.0516 g/mol

Convert between Cr₄Mn₅Fe₄Co₇Ni₆Cu₅Zn₄Ga₃Ge₂As₄Se₄Br₅Kr₆Rb₄Sr₃Y₃Zr₃Nb₅Mo₈Tc₆ weight and moles

Compound	Moles		Weight, g
Cr₄Mn₅Fe₄Co₇Ni₆Cu₅Zn₄Ga₃Ge₂As₄Se₄Br₅Kr₆Rb₄Sr₃Y₃Zr₃Nb₅Mo₈Tc₆

Elemental composition of Cr₄Mn₅Fe₄Co₇Ni₆Cu₅Zn₄Ga₃Ge₂As₄Se₄Br₅Kr₆Rb₄Sr₃Y₃Zr₃Nb₅Mo₈Tc₆

Element	Symbol	Atomic weight	Atoms	Mass percent
Chromium	Cr	51.9961	4	3.0226
Manganese	Mn	54.938045	5	3.9920
Iron	Fe	55.845	4	3.2463
Cobalt	Co	58.933195	7	5.9952
Nickel	Ni	58.6934	6	5.1178
Copper	Cu	63.546	5	4.6175
Zinc	Zn	65.38	4	3.8006
Gallium	Ga	69.723	3	3.0398
Germanium	Ge	72.64	2	2.1113
Arsenic	As	74.92160	4	4.3552
Selenium	Se	78.96	4	4.5900
Bromine	Br	79.904	5	5.8061
Krypton	Kr	83.798	6	7.3068
Rubidium	Rb	85.4678	4	4.9683
Strontium	Sr	87.62	3	3.8201
Yttrium	Y	88.90585	3	3.8761
Zirconium	Zr	91.224	3	3.9772
Niobium	Nb	92.90638	5	6.7509
Molybdenum	Mo	95.96	8	11.1564
Technetium	Tc	96.906365	6	8.4498

Computing molar mass step by step
First, compute the number of each atom in Cr₄Mn₅Fe₄Co₇Ni₆Cu₅Zn₄Ga₃Ge₂As₄Se₄Br₅Kr₆Rb₄Sr₃Y₃Zr₃Nb₅Mo₈Tc₆: Cr: 4, Mn: 5, Fe: 4, Co: 7, Ni: 6, Cu: 5, Zn: 4, Ga: 3, Ge: 2, As: 4, Se: 4, Br: 5, Kr: 6, Rb: 4, Sr: 3, Y: 3, Zr: 3, Nb: 5, Mo: 8, Tc: 6 Then, lookup atomic weights for each element in periodic table: Cr: 51.9961, Mn: 54.938045, Fe: 55.845, Co: 58.933195, Ni: 58.6934, Cu: 63.546, Zn: 65.38, Ga: 69.723, Ge: 72.64, As: 74.9216, Se: 78.96, Br: 79.904, Kr: 83.798, Rb: 85.4678, Sr: 87.62, Y: 88.90585, Zr: 91.224, Nb: 92.90638, Mo: 95.96, Tc: 96.906365 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Cr₄Mn₅Fe₄Co₇Ni₆Cu₅Zn₄Ga₃Ge₂As₄Se₄Br₅Kr₆Rb₄Sr₃Y₃Zr₃Nb₅Mo₈Tc₆) = ∑ Count_i * Weight_i = Count(Cr) * Weight(Cr) + Count(Mn) * Weight(Mn) + Count(Fe) * Weight(Fe) + Count(Co) * Weight(Co) + Count(Ni) * Weight(Ni) + Count(Cu) * Weight(Cu) + Count(Zn) * Weight(Zn) + Count(Ga) * Weight(Ga) + Count(Ge) * Weight(Ge) + Count(As) * Weight(As) + Count(Se) * Weight(Se) + Count(Br) * Weight(Br) + Count(Kr) * Weight(Kr) + Count(Rb) * Weight(Rb) + Count(Sr) * Weight(Sr) + Count(Y) * Weight(Y) + Count(Zr) * Weight(Zr) + Count(Nb) * Weight(Nb) + Count(Mo) * Weight(Mo) + Count(Tc) * Weight(Tc) = 4 * 51.9961 + 5 * 54.938045 + 4 * 55.845 + 7 * 58.933195 + 6 * 58.6934 + 5 * 63.546 + 4 * 65.38 + 3 * 69.723 + 2 * 72.64 + 4 * 74.9216 + 4 * 78.96 + 5 * 79.904 + 6 * 83.798 + 4 * 85.4678 + 3 * 87.62 + 3 * 88.90585 + 3 * 91.224 + 5 * 92.90638 + 8 * 95.96 + 6 * 96.906365 = 6881.0516 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is As₄Br₅Co₇Cr₄Cu₅Fe₄Ga₃Ge₂Kr₆Mn₅Mo₈Nb₅Ni₆Rb₄Se₄Sr₃Tc₆Y₃Zn₄Zr₃

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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