PTHH: \(2KClO_3\xrightarrow[to]{MnO_2}2KCl+3O_2\\ 0,2mol\rightarrow0,2mol:0,3mol\)
\(n_{KClO_3}=\dfrac{24,5}{122,5}=0,2\left(mol\right)\)
a. \(V_{O_2}=0,3.22,4=6,72\left(l\right)\)
b. PTHH: \(C+O_2\underrightarrow{to}CO_2\\ 0,3mol:0,3mol\rightarrow0,3mol\)
\(m_C=12.0,3=3,6\left(g\right)\)
\(m_{than}=\dfrac{3,6}{96\%}.100\%=3,75\left(g\right)\)