ATOMS, MOLECULES AND STOICHIOMETRY
ATOMS, MOLECULES AND STOICHIOMETRY GCE Advance subsidiary Level CHEMISTRY 9701 (AS LEVEL CHEMISTRY 9701) RELATIVE ATOMIC MASS: Atomic mass of an isotopes of an element compound with 1/12 th part of an isotopes of carbon-12 is called relative atomic mass or relative isotopic mass. The relative atomic mass can be calculated by multiplying the relative isotopic mass of each isotopes by its isotopic abundance divided by total number of atomics. e.g; Chlorine have two isotopes of relative atomic mass 35 and 37 with relative abundance 75% and 25% respectively. The relative atomic of mass of chlorine is; (35x75) + (37 x 25) Ar of chlorine = ...