![]() So, the above method can be used for any molecule to calculate it’s gram molecular mass. For practical purposes we use a much-simplified formula which is, to use this formula we use the concept that the weight of one mole of a substance will be equal to its atomic weight. It is always expressed in the unit grams/mole (g/mol).īut the above-mentioned formula seems to be complicated to use it in actual calculations. Gram Formula Mass = mass of the solute/formula mass of the solute. The actual formula for calculating the Gram Molecular Mass of a substance is : This is a fundamental SI unit and is denoted as N A. The number is equal to 6.02214076×10 23 and is known as Avogadro’s constant. The law states that equal volumes of gases under equal temperature and pressure will contain the same number of molecules.Īvogadro’s number is named in his honor. he is most famous for proposing Avogadro’s law. Lorenzo Romano Amedeo Carlo Avogadro was an Italian scientist. ![]() This concept is used extensively across organic, inorganic, and physical chemistry. Thus mole is a fundamental quantity when chemical calculations are involved. ![]() The atomic mass of one mole of an element, molecular compound or ionic compound is known as the Gram formula mass (a.k.a. 6.023 x 10 23 number of molecules or atoms (depending on the type of compound it is) is present in one mole of a substance. Weight of one mole of an element, ionic compound or molecular compound is the Gram formula mass. ![]() 2 Solved Examples for Gram Formula Mass Gram Formula Mass
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