››Percent composition by element
Element Symbol Atomic Mass # that Atoms Mass Percent
MercuryHg200.59192.613%
OxygenO15.999417.387%


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Browse the list ofcommon chemical compounds.

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››More details onmolar mass and also molecular weight

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

Finding molar fixed starts with units that grams per mole (g/mol). Once calculating molecular weight of a chemical compound, the tells us how numerous grams room in one mole of the substance. The formula weight is just the weight in atomic mass units of every the atom in a given formula.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or team of atom in a compound can be computed by dividing the total weight of the atom (or team of atoms) in the formula by the formula weight and also multiplying by 100.

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

A typical request top top this site is to transform grams to moles. To finish this calculation, you have to know what substance you space trying to convert. The factor is the the molar fixed of the substance affects the conversion. This site defines how to uncover molar mass.

Formula weights are especially useful in identify the relative weights that reagents and also products in a chemistry reaction. These family member weights computed native the chemical equation space sometimes called equation weights.

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The atomic weights used on this site come indigenous NIST, the national Institute of Standards and Technology. We usage the most usual isotopes. This is how to calculation molar massive (average molecular weight), i beg your pardon is based on isotropically weighted averages. This is not the same as molecular mass, i m sorry is the massive of a single molecule the well-defined isotopes. For bulk stoichiometric calculations, we are usually identify molar mass, i beg your pardon may likewise be called standard atomic weight or average atomic mass.


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