\(n_{KClO_3}=\dfrac{29.4}{122.5}=0.24\left(mol\right)\)
\(2KClO_3\underrightarrow{^{^{t^0}}}2KCl+3O_2\)
\(0.24.....................0.36\)
KClO3 : Kali clorat
KCl : Kali clorua
\(V_{O_2}=0.36\cdot22.4=8.064\left(l\right)\)
\(b.\)
\(n_P=\dfrac{6.2}{31}=0.2\left(mol\right)\)
\(4P+5O_2\underrightarrow{^{^{t^0}}}2P_2O_5\)
Lập tỉ lệ :
\(\dfrac{0.2}{4}< \dfrac{0.36}{5}\) => O2 dư
\(n_{O_2\left(dư\right)}=0.36-0.2\cdot\dfrac{5}{4}=0.11\left(mol\right)\)
\(m_{O_2}=0.11\cdot32=3.52\left(g\right)\)
\(m_{P_2O_5}=0.1\cdot142=14.2\left(g\right)\)
Chúc em học tốt nhé !