››Percent ingredient by element
Element Symbol Atomic Mass # the Atoms Mass Percent
HydrogenH1.0079411.600%
NitrogenN14.0067122.228%
OxygenO15.9994376.172%

››Similar chemical formulasNote the all formulas are case-sensitive.Did you average to find the molecular weight of one of these similar formulas?HNO3HNo3


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Browse the perform ofcommon chemical compounds.

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››More information onmolar mass and also molecular weight

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

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

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

The atomic weights provided on this site come from NIST, the national Institute that Standards and also Technology. We use the most typical isotopes. This is how to calculation molar fixed (average molecular weight), which is based upon isotropically load averages. This is no the exact same as molecular mass, which is the fixed of a solitary molecule the well-defined isotopes. For mass stoichiometric calculations, we space usually determining molar mass, which may likewise be dubbed standard atomic weight or typical atomic mass.

Formula weights are especially advantageous in identify the loved one weights the reagents and products in a chemical reaction. These loved one weights computed from the chemistry equation room sometimes called equation weights.

If the formula supplied in calculating molar mass is the molecule formula, the formula load computed is the molecule weight. The percent by weight of any kind of atom or group of atom in a compound have the right to be computed by separating the full weight the the atom (or team of atoms) in the formula by the formula weight and multiplying through 100.

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


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