Ta có:
a, \(n_{Fe3O4}=\frac{23,2}{232}=0,1\left(mol\right)\)
\(PTHH:3Fe+2O_2\rightarrow Fe_3O_4\)
______________0,2_______0,1
\(\Rightarrow V_{O2}=0,2.22,4=4,48\left(l\right)\)
b, \(2KClO_3\rightarrow2KCl+3O_2\)
Ta có:
\(n_{KClO3}=\frac{2}{15}\left(mol\right)\Rightarrow m_{KClO3}=\frac{2}{15}.122,5=\frac{49}{3}\left(g\right)\)