\(2SO_2+O_2\underrightarrow{^{to,xt}}2SO_3\)
* \(n_{SO2}=\frac{P.V}{R.T}\)
\(\Rightarrow n_{SO2}=\frac{n.R.T}{P}\)
\(=\frac{0,15.0,082.250}{3,2}=0,96\left(l\right)\)
* \(n_{SO3}=\frac{P.V}{R.T}\)
\(\Rightarrow V_{SO3}=\frac{n.R.T}{P}=\frac{0,2.0,082.250}{3,2}=1,28\left(l\right)\)
* \(V_{O2}=3-V_{SO2}-V_{SO3}=0,76\left(l\right)\)
\(\Rightarrow\%V_{O2}=\frac{0,76}{3}.100\%=25,3\%\)