The molar mass of a compound is equal to the sum of the atomic masses of its constituent atoms in g/mole.Although there is no physical way of measuring the number of moles of a compound, we can relate its mass to the number of moles by using the compound's molar mass as a direct conversion factor.To convert between mass and number of moles, you can use the molar mass of the substance. Then, you can use Avogadro's number to convert the number of moles to number of atoms.
1 mole of a pure substance has a mass equal to its molar mass expressed in grams. This is known as the molar mass, M, and has the units g mol-1.So 2 moles of a substance would have a mass = 2 x molar mass .3 moles of a substance would have a mass = 3 x molar mass etc This leads to the formula:
mass = moles x molar mass
May 19th, 2015
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