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FeS2=120g/mol
FeAsS=163g/mol
FeS2:
Fe:
Fe=56g/mol
%Fe:
56g/mol/120g/mol*100%=47%
%S2:
S2=64g/mol
%S2:
64g/mol/120g/mol*100%=53%
FeAsS:
As=75g/mol
75g/mol/163g/mol*100%=46%
S:
32g/mol/163g/mol*100%=20%
Fe:
56g/mol/163g/mol*100%=34%
I dodajemy:
Fe:
0,9*47%+0,1*34%=45,7%
S:
0,9*53%+0,1*20%=49,7%
As:
0,1*46%=4,6%