Mass Of Elements

Molecular Weight Calculator

This online calculator you can use for computing the average molecular weight (MW) of molecules by entering the chemical formulas (for example C3H4OH(COOH)3 ). Or you can choose by one of the next two option-lists, which contains a series of common organic compounds (including their chemical formula) and all the elements. The molecular mass calculator will recognize the entered formula's, which are included in the list of organic compounds.
The calculator handles at most two different bracket levels. Make sure you enter the molecule of crystallization at last (e.g. C2HCl3O.H2O ).

!!!Lenntech BV cannot be held responsible for errors in the calculation,
the program itself or the explanation. For question or remarks please contact us.
This Calculator has been tested on Internet Explorer version 6 only,
Firefox might not show all fields correctly.

Molecular mass or molar mass are used in stoichiometry calculations in chemistry.
In related terms, another unit of mass often used is Dalton (Da) or unified atomic mass unit (u) when describing atomic masses and molecular masses. It is defined to be 1/12 of the mass of one atom of carbon-12 and in older works is also abbreviated as 'amu'.

Also, important in this field is Avogadro's number (N_A) or Avogadro's constant (6.0221 x 10²³).
The term 'mole' is defined in that one mole of a substance with a molecular (or atomic) mass of one (1), will have a mass of 1 gram. Or 1 mole of a substance will contain Avogadro's number of that substance. Using the above calculator you could find that e.g. a pollution of 1 gram of benzene in a certain amount of water converts to N_A/78.11≈ 7.7098 × 10²¹ molecules polluting that water!

[ Calculators ] [ Converters ] [ Periodic Table ]

Mass Of Elements In Grams
Mass Of Elements In Periodic Table
Mass Of Elements Calculator
Mass Of Elements

More from 'Calculators'

Since a mass spectrometer separates and detects ions of slightly different masses, it easily distinguishes different isotopes of a given element. This is manifested most dramatically for compounds containing bromine and chlorine, as illustrated by the following examples.
Mass percent composition describes the relative quantities of elements in a chemical compound. Mass percent composition is also known percent by weight. It is abbreviated as w/w%. For a solution, mass percent equals the mass of an element in one mole of the compound divided by the molar mass of the compound, multiplied by 100%.

Select elements and see the molar mass of the compound. Chemical formula (Hill notation) Molar mass (g/mol) Modify. For example in the element oxygen, the atomic mass is 15.9994u so that would also mean that 1 mol of oxygen weighs 15.9994g. In 1mole of a substance there is a set number of atoms or molecules (6.022140857×10^23).

Lenntech (European Head Office)

Mass Of Elements In Grams

Distributieweg 3
2645 EG Delfgauw
The Netherlands
Phone: +31 152 610 900
fax: +31 152 616 289
e-mail: info@lenntech.com

Mass Of Elements In Periodic Table

Lenntech USA LLC (Americas)

5975 Sunset Drive
South Miami, FL 33143
USA
Phone: +1 877 453 8095
e-mail: info@lenntech.com

Mass Of Elements Calculator

Lenntech DMCC (Middle East)

Level 5 - OFFICE #8-One JLT Tower
Jumeirah Lake Towers
Dubai - U.A.E.
Phone: +971 4 429 5853
e-mail: info@lenntech.com