a)n P=12,4/31=0,4(mol)
b) 4P+5O2---->2P2O5
c) Theo pthh
n O2=5/4n P=0,5(mol)
V O2=0,5.22,4=11,2(l)
V kk=11,2.5=56(l)
c) Theo pthh
n P2O5=1/2n P=0,2(mol)
m P2O5=0,2.142=28,4(g)
Chúc bạn học tốt
a) \(n_P=\frac{12,4}{31}=0,4mol\)
b) \(4P+5O_2\underrightarrow{t^o}2P_2O_5\)
c)\(V_{O_2}=0,5.22,4=11,2l\)
\(V_{kk}=5.V_{O_2}=5.11,2=56l\)
d)\(m_{P_2O_5}=n.M=0,2.142=28,4g\)
số mol P là;\(n=\frac{12,4}{31}=0,4\left(mol\right)\)
\(4P+5O_2\rightarrow2P_2O_5\)
\(V_{kk}=5.V_{O_2}=5.\left(0,4.5:4.22,4\right)=56\left(l\right)\)
\(m_{P_2O_5}=n.M=\left(0,4.2:4\right).\left(31.2+16.5\right)=28,4\left(g\right)\)