››Percent composition by element
Element Symbol Atomic Mass # the Atoms Mass Percent
SodiumNa22.989770274.186%
OxygenO15.9994125.814%


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Browse the perform ofcommon chemistry compounds.

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››More details onmolar mass and molecular weight

In chemistry, the formula weight is a amount computed by multiply the atomic load (in atom mass units) the each aspect in a chemical formula by the number of atoms that that element present in the formula, then adding all of these commodities together.

Finding molar massive starts v units of grams per mole (g/mol). Once calculating molecular load of a chemistry compound, it tells us how numerous grams are in one mole of that substance. The formula load is just the weight in atomic mass systems of every the atom in a provided formula.

Formula weights space especially valuable in identify the loved one weights the reagents and also products in a chemical reaction. These loved one weights computed native the chemistry equation space sometimes referred to as equation weights.

Using the chemistry formula that the compound and also the periodic table the elements, we can add up the atom weights and calculate molecular weight of the substance.

A common request top top this site is to transform grams come moles. To complete this calculation, you need to know what substance you are trying come convert. The reason is that the molar massive of the substance affects the conversion. This site describes how to find molar mass.

The atomic weights supplied on this site come indigenous NIST, the national Institute of Standards and Technology. We usage the most usual isotopes. This is exactly how to calculation molar fixed (average molecular weight), which is based upon isotropically load averages. This is no the very same as molecule mass, i m sorry is the mass of a solitary molecule the well-defined isotopes. For bulk stoichiometric calculations, we room usually identify molar mass, which may likewise be dubbed standard atomic weight or average atomic mass.

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If the formula offered in calculating molar fixed is the molecular formula, the formula load computed is the molecular weight. The portion by weight of any kind of atom or group of atom in a compound have the right to be computed by splitting the complete weight that the atom (or group of atoms) in the formula by the formula weight and multiplying through 100.


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