a, \(2KClO_3\underrightarrow{^{to}}2KCl+3O_2\)
b,\(n_{KClO2}=\frac{49}{122,5}=0,4\left(mol\right)\)
\(\Rightarrow n_{O2}=0,6\left(mol\right)\)
\(\Rightarrow V_{O2}=0,6.22,4=13,44\left(l\right)\)
c,\(4P+5O_2\underrightarrow{^{to}}2P_2O_5\)
0,48_____0,6_______
\(\Rightarrow m_P=0,48.31=14,88\left(g\right)\)