4P+5O2-to>2P2O5
0,05--0,0625------0,025 mol
n P=\(\dfrac{1,55}{31}\)=0,05 mol
=>VO2=0,0625.22,4=1,4l
=> mP2O5=0,025.142=3,55g
\(n_P=\dfrac{1,55}{31}=0,05\left(mol\right)\\ 4P+5O_2\rightarrow\left(t^o\right)2P_2O_5\\ a,n_{O_2}=\dfrac{5}{4}.0,05=0,0625\left(mol\right)\\ V_{O_2\left(đktc\right)}=0,0625.22,4=1,4\left(l\right)\\ b,n_{P_2O_5}=\dfrac{0,05}{2}=0,025\left(mol\right)\\ \Rightarrow m_{P_2O_5}=0,025.142=3,55\left(g\right)\)
Đáng ra thấy tên T.Anh anh sẽ x24,79 nhưng đề cho đkc anh x22,4 nè.