››Percent composition by element
Element Symbol Atomic Mass # the Atoms Mass Percent
HydrogenH1.00794613.128%
CarbonC12.0107252.143%
OxygenO15.9994134.730%


››Calculate the molecule weightof a chemical link 0) location="/molarmass/" + urlencode(this.q.value); rather alert("Please go into 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 enter a chemistry formula or surname of a substance."); return false;">

Browse the list ofcommon chemistry compounds.

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››More info onmolar mass and also molecular weight

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

Finding molar fixed starts through units the grams per mole (g/mol). When calculating molecular load of a chemistry compound, that tells united state how many 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.

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

The atom weights provided on this website come from NIST, the national Institute that Standards and Technology. We use the most usual isotopes. This is exactly how to calculate molar massive (average molecule weight), i beg your pardon is based upon isotropically weighted averages. This is not the same as molecule mass, which is the massive of a single molecule that well-defined isotopes. For bulk stoichiometric calculations, we space usually identify molar mass, i beg your pardon may likewise be called standard atomic weight or typical atomic mass.

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

A common request on this website is to transform grams come moles. To finish this calculation, you need to know what substance you room trying to convert. The factor is that the molar mass of the problem affects the conversion. This site defines how to uncover molar mass.

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Formula weights room especially helpful in identify the loved one weights that reagents and products in a chemistry reaction. These loved one weights computed indigenous the chemistry equation space sometimes referred to as equation weights.


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