a) PTHH: C + O2 -to-> CO2
x_____________x_____x(mol)
S+ O2 -to-> SO2
y__y________y(mol)
b) Ta có:
\(\left\{{}\begin{matrix}12x+32y=5,6\\32x+32y=9,6\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,2\\y=0,1\end{matrix}\right.\)
mC=0,2.12=2,4(g)
mS=0,1.32=3,2(g)
c)
\(\%mC=\dfrac{2,4}{5,6}.100\approx42,857\%\\ \rightarrow\%mS\approx100\%-42,857\%\approx57,143\%\)
d)
\(\%nCO2=\dfrac{x}{x+y}.100\%=\dfrac{0,2}{0,2+0,1}.100\approx66,667\%\\ \rightarrow\%nSO2=\dfrac{y}{x+y}.100\%=\dfrac{0,1}{0,2+0,1}.100\approx33,333\%\)
a)nO2=m/M=9,6/32=0,3 (mol)
C + O2 ->t° CO2
1:1:1
x/12 :(x/12) :x/12 mol
S + O2->t° SO2
1:1:1
5,6-x/32: (5,6-x/32): 5,6-x/32 mol
gọi x là số gam của cacbon
nC=m/M=x/12(mol)
nS=5,6-x/12 (mol)
b)ta có phương trinh
5,6-x/32+x/12=0,3
<=>3(5,6-x)/96 + 8x/96= 28,8/96
->3(5,6-x)+8x=28,8
<=> 16,8 -3x+8x=28,8
<=>-3x+8x=12
<=>5x=12
<=>x=2,4
-> mC=2,4(g)
mS=5,6-2,4=3,2(g)
c)%mC=2,4/5,6.100%= 42,857%
%mS=100%-42,857%=57,143%
d)%nCO2=0,2/0,3.100%=66,7%
%nSO2=100%-66,7%=33,3%