\(n_{KClO_3}=\frac{m_{KClO_3}}{M_{KClO_3}}=\frac{9,8}{122,5}=0,08\left(mol\right)\)
\(PTHH:2KClO_3\rightarrow2KCl+3O_2\)
\(Theo-PT:2-----2--3\left(mol\right)\)
\(Theo-đề:0,08----x---y--\left(mol\right)\)
\(\Rightarrow n_{KCl}=x=\frac{0,08\cdot2}{2}=0,08\left(mol\right)\)
\(\Rightarrow m_{KCl}=n_{KCl}.M_{KCl}=0,08.74,5=5,96\left(g\right)\)
\(\Rightarrow n_{O_2}=y=\frac{0,08\cdot3}{2}=0,12\left(mol\right)\)
\(\Rightarrow V_{O_2}=n_{O_2}.22,4=0,12\cdot22,4=2,688\left(l\right)\)
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