miu Ca(OH)2=40+32+2=74g/mol
74 gCa(OH)2.....40g Ca......32gO......2gH
100..........x...................y.............z
x=54,05 g %Ca y=43,24 g%O z=2,7g %H
miu Mg3(PO4)2=72+62+128=262g/mol
262gMg3(PO4)2.....74g Mg........62g P..........128g O
100.........................a.......................b............c
a=28,24 g%Mg b=23,66 g% P c=48,85g % O
