\(n_P=\dfrac{6,2}{31}=0,2\left(mol\right)\); \(n_{O_2}=\dfrac{7,437}{24,79}=0,3\left(mol\right)\)
PTHH: \(4P+5O_2\underrightarrow{t^o}2P_2O_5\)
Xét tỉ lệ: \(\dfrac{0,2}{4}< \dfrac{0,3}{5}\) => Hiệu suất tính theo P
\(n_{P\left(pư\right)}=\dfrac{0,2.80}{100}=0,16\left(mol\right)\)
PTHH: \(4P+5O_2\underrightarrow{t^o}2P_2O_5\)
0,16------->0,08
=> \(m_{P_2O_5}=0,08.142=11,36\left(g\right)\)