Chapter 8 Chemical Composition Chemistry B2A. Atomic mass unit (amu) = × g Atomic Weight Atoms are so tiny. We use a new unit of mass: Molar mass is the mass in grams of one mole of particles (atoms, ions, molecules, formula units). Equal to the numerical value of the ...
of boiling ethyl alcohol which dissolved all but grams of polymeric material. When the alcoholic solution was allowed to cool, a finely di- 0o vided solid separated out and was removed by filtration. This solid, which proved to be dimeric ethylene adipamide,- was recrystallized twice from ...