\(n_{Fe}=\frac{5,6}{56}=0,1\left(mol\right)\)
\(n_S=\frac{6,4}{32}=0,2\left(mol\right)\)
\(PTHH:Fe+S\rightarrow FeS\)
Trước____ 0,1__0,2_________
Phứng__0,1___0,1__________
Sau _____0 ___0,1____ 0,1___
\(\Rightarrow m_{FeS}=0,1.88=8,8\left(g\right)\)
Fe+S--->FeS
n S=6,4/32=0,2(mol)
n Fe=5,6/56=0,1(mol)
-->S dư
n FeS=n Fe=0,1(mol)
m FeS=0,1.88=8,8(g)