x
S+O2=SO2
y
C+O2=CO2
n(O2)=28/22,4=1,25;
m(S)=32x; m(C)=44y;
система: 32x+12y=25
x+y=1,25
y=0,75; x=0,25;
w(S)=(0,25*32)/25=0,32(32%); w(C)=68%.
.......................................................................................................................................................................