Note: N n means the number of relative element. MW= N 1xMW 1+N 2xMW 2+N 3xMW 3+…+N nxMW n 1 mol consists of exactly 6.02214076 * 10 23 molecules.
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. (1 u is equal to 1/12 the mass of one atom of carbon-12) Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). a pollution of 1 gram of benzene in a certain amount of water converts to NA/78.11≈ 7.7098 × 1021 molecules polluting that water! Using the above calculator you could find that e.g. Or 1 mole of a substance will contain Avogadro's number of that substance. The term "mole" is defined in that one mole of a substance with a molecular (or atomic) mass of one, will have a mass of 1 gram. Avogadro's number (N A) or Avogadro's constant (6.0221 x 10 23) is also important in this field. 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". 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.
Molecular mass or molar mass are used in stoichiometry calculations in chemistry.
To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.ĭefinitions of molecular mass, molecular weight, molar mass and molar weight: Instructions to calculate molar mass (molecular weight) of a chemical compound:
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