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Law of Conservation of Mass
The number and type of atoms in the reactants will always be the same as the number and type of atoms in the products.
Molar Mass
It is a particular substance until: kg mol -1, kg/mol. Dividing the mass of a substance by amount of substance.
Molecular Mass
Calculated as the mass of substance related to 1/12th of the mass.
Atomic Mass Unit
a unit of mass used to describe matter at the atomic scal
