\(n_{KClO_3\left(bđ\right)}=\dfrac{147}{122,5}=1,2\left(mol\right)\)
=> \(n_{KClO_3\left(pư\right)}=\dfrac{1,2.80}{100}=0,96\left(mol\right)\)
PTHH: \(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)
0,96------------->1,44
=> \(V_{O_2}=1,44.22,4=32,256\left(l\right)\)
mD = 147 - 1,44.32 = 100,92 (g)
\(\%m_{KClO_3\left(D\right)}=\dfrac{m_{KClO_3\left(D\right)}}{m_D}.100\%=\dfrac{\left(1,2-0,96\right).122,5}{100,92}.100\%=29,132\%\)