% Ca = (masa Ca/masa molara compus)*100=(40/56)*100=71,429%
%O = (masa O/masa molara compus)*100=(16/56)*100=28,571%
sau %O=100-%Ca = 28,571%
FORMULA ESTE VALABILA PT ORICE COMPUS
%C=(12/16)*100=75%
%H=(4/16)*100=25%
%Mg=(24/95)*100=25,263%
%Cl=(2*35,5/95)*100=74,737%