Bạn tham khảo nha!
a) MFe2O3= 56x2+16x3 = 160
%Fe= 56x2/160x100%= 70%
%O= 16x3/160x100%= 30%
b) MSO3= 32+16x3= 80
%S= 32/80x100%= 40%
%O= 16x3/80x100%= 60%
c) MH2SO4= 1x2+ 32+ 16x4= 98
%H= 1x2/98x100%= 2%
%S= 32/98x100%= 33%
%O= 16x4/98x100%= 65%
d) MCuSO4= 64+ 32+ 16x4= 160
%Cu= 64/160x100%= 40%
%S= 32/160x100%=20%
%O= 16x4/160x100%= 40%
e) MP2O5= 31x2+ 16x5= 142
%P= 31x2/142x100%= 43,7%
%O= 16x5/142x100%= 56,3%
f) MAl(OH)3= 27+ (16x3)+ (1x3)= 78
%Al= 27/78x100%= 34,6%
%O= 16x3/78x100%= 61,5%
%H= 1x3/78x100%= 3,9%
