4P+5O2---->2P2O5
n\(_P=0,1\left(mol\right)\)
n\(_{O2}=\frac{5}{32}=0,156\left(mol\right)\)
=> O2 dư
Theo pthh
n\(_{O2}=\frac{5}{4}n_P=0,125\left(mol\right)\)
n\(_{O2}dư=0,156-0,125=0,031\left(mol\right)\)
m\(_{O2}dư=0,031.32=0,992\left(g\right)\)
Theo pthh
n\(_{P2O5}=\frac{1}{2}n_P=0,05\left(mol\right)\)
m\(_{P2O5}=0,05.142=7,1\left(g\right)\)