a)\(2KMnO4-->K2MnO4+MnO2+O2\)
\(n_{KMnO4}=\frac{94,8}{158}=0,6\left(mol\right)\)
\(n_{O2}=\frac{1}{2}nKMnO4=0,3\left(mol\right)\)
\(V_{O2}=0,3.22,4=6,72\left(l\right)\)
b) \(2KClO3-->2KCl+3O2\)
\(n_{KClO3}=\frac{2}{3}n_{O2}=0,2\left(mol\right)\)
\(m_{KClO3}=0,2.122,5=24,5\left(g\right)\)
a) \(2KMnO_4\underrightarrow{^{to}}K_2MnO_4+MnO_2+O_2\)
nKMnO4=9,84/158=123/1975 (mol)
==> nO2=1/2nKMnO4=(1/2).(123/1975)=123/3950 (mol)
==> VO2=(123/3950).22,4=0,6975 (l)
b) \(2KClO_3\underrightarrow{^{to}}2KCl+3O_2\)
nKClO3=2/3nO2=(2/3).(123/3950)=41/1975 (mol)
==> mKClO3=(41/1975).122,5=2,543 (g)