Ta có:
\(n_{CH4}=\frac{6,72}{22,4}=0,3\left(mol\right)\)
\(PTHH:CH_4+O_2\rightarrow CO_2+H_2O\)
_______0,3_______0,3_____________
\(\Rightarrow V_{O2}=0,3.22,4=6,72\left(l\right)\)
\(PTHH:2KClO_3\rightarrow2KCl+3O_2\)
__________0,2_________________0,3
\(\Rightarrow m_{KClO3}=0,2.122,5=24,5\left(g\right)\)