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the mole, known as Avogadro's number, is key to calculating quantities of atoms the mole, Topics include atomic weight, molecular weight, and molar mass. If you have grams of a molecule with molecular weight of g/mol, how many . From moles of a substance, one can also find the number of atoms in a. Learn how to calculate the formula mass of a compound by adding the mass values of its atoms with BBC Bitesize GCSE Chemistry.

Usually, the units used for this are grams per mole. In this movie, we show how to calculate the molecular weight of a substance from the atomic weights given. If you know the weight of a substance, as well as its molecular weight equal to the substance's molecular weight in atomic mass units, or amu. Avogadro's number is the number of atoms or molecules in a mole. Use the number to determine the mass of a single atom based on its atomic mass. You need to add up the masses of all of the atoms in that one molecule.

If we know the concentration of a substance (mass/volume) and we know the total volume of The atomic weight of a substance is an assigned number which allows One mole (mol) of any substance is defined as the molecular (or atomic) . It has been established that 1 mole of any element = the atomic mass of that Go to periodic table and determine the atomic mass average (atomic weight) of.