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%X=mass Xmass compound×100%%X=mass Xmass compound×100%
molecular or molar mass(amu orgmol)empirical formula mass(amu orgmol)=nformula units/moleculemolecular or molar mass(amu orgmol)empirical formula mass(amu orgmol)=nformula units/molecule
(AxBy)n = AnxBny
M=mol soluteL solutionM=mol soluteL solution
C1V1 = C2V2
Percent by mass=mass of solutemass of solution×100Percent by mass=mass of solutemass of solution×100
ppm=mass solutemass solution×106ppmppm=mass solutemass solution×106ppm
ppb=mass solutemass solution×109ppbppb=mass solutemass solution×109ppb
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