MNa2SO4 = 23.2+32+16.4 = 142 g/mol
=> %Na/Na2SO4 = 100.23.2/142 = 32,39%
=> %S/Na2SO4 = 100.32/142 = 32,39% = 22.54%
=> %O/Na2SO4 = 100.16.4/142 = 45,07%
MCaCO3 = 40+12+16.3 = 100 g/mol
=> %Ca/CaCO3 = 100.40/100 = 40%
=> %C/CaCO3 = 100.12/100 = 12%
=> %O/CaCO3 = 100.16.3/100=48%
MAl2(SO4)3 = 27.2+3(32+16.4) = 342 g/mol
=> %Al/Al2(SO4)3 = 100.27.2/342 = 15,79%
=> %S/Al2(SO4)3 = 100.32/342 = 28,07%
=> %O/Al2(SO4)3 = 100.16.12/342 = 56,14%
MCa(OH)2 = 40+2(1+16) = 74 g/mol
=> %Ca/Ca(OH)2 = 100.40/74 = 54,05%
=> %O/Ca(OH)2 = 100.32/74 = 43,24%
=> %O/Ca(OH)2 = 100.2/74 = 2,71%
MNaHCO3 = 23+1+12+16.3 = 84 g/mol
=> %Na/NaHCO3 = 100.23/84 = 27,38%
=> %H/NaHCO3 = 100.1/84 = 1,19%
=> %C/NaHCO3 = 100.12/84 = 14,29%
=> %O/NaHCO3 = 100.16.3/84 = 57,14%