Ta có: \(n_P=\dfrac{6,2}{31}=0,2\left(mol\right)\)
a. \(PTHH:4P+5O_2\overset{t^o}{--->}2P_2O_5\)
Theo PT: \(n_{O_2}=\dfrac{5}{4}.n_P=\dfrac{5}{4}.0,2=0,25\left(mol\right)\)
\(\Rightarrow V_{O_2}=0,25.22,4=5,5\left(lít\right)\)
b. Theo PT: \(n_{P_2O_5}=\dfrac{1}{2}.n_P=\dfrac{1}{2}.0,2=0,1\left(mol\right)\)
\(\Rightarrow m_{P_2O_5}=0,1.142=14,2\left(g\right)\)
\(n_P=\dfrac{6,2}{31}=0,2\left(mol\right)\\ 4P+5O_2-^{t^o}\rightarrow2P_2O_5\\ a.n_{O_2}=\dfrac{5}{4}n_P=0,25\left(mol\right)\\ \Rightarrow m_{O_2}=0,25.32=8\left(g\right)\\ b.BTKLm_P+m_{O_2}=m_{P_2O_5}\\ \Rightarrow m_{P_2O_5}=6,2+8=14,2\left(g\right)\)
