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


››Calculate the molecular weightof a chemical link 0) location="/molarmass/" + urlencode(this.q.value); else alert("Please get in a chemical formula or surname of a substance."); return false;">Enter a chemistry formula: 0) location="/molarmass/" + urlencode(this.form.q.value); else alert("Please get in a chemical formula or surname of a substance."); return false;">

Browse the list ofcommon chemistry compounds.

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››More info onmolar mass and molecular weight

In chemistry, the formula weight is a quantity computed by multiply the atomic load (in atom mass units) that each element in a chemistry formula by the variety of atoms that that element present in the formula, then including all of these products together.

If the formula provided in calculating molar massive is the molecular formula, the formula load computed is the molecule weight. The percentage by weight of any kind of atom or team of atom in a compound deserve to be computed by splitting the total weight the the atom (or team of atoms) in the formula by the formula weight and multiplying by 100.

Formula weights space especially advantageous in identify the loved one weights the reagents and products in a chemical reaction. These loved one weights computed native the chemical equation space sometimes called equation weights.

Finding molar fixed starts v units that grams every mole (g/mol). Once calculating molecular weight of a chemistry compound, it tells us how many grams space in one mole of the substance. The formula load is simply the load in atomic mass devices of every the atom in a given formula.

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

A typical request top top this website is to convert grams come moles. To finish this calculation, you have to know what substance you are trying to convert. The reason is the the molar massive of the substance affects the conversion. This site explains how to discover molar mass.

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The atom weights provided on this site come native NIST, the national Institute that Standards and Technology. We use the most common isotopes. This is exactly how to calculation molar massive (average molecule weight), i beg your pardon is based on isotropically weight averages. This is no the same as molecular 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, i m sorry may additionally be referred to as standard atomic weight or mean atomic mass.


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