\(n_{SO_3}=\dfrac{m}{M}=\dfrac{4}{80}=0,05\left(mol\right)\)
⇒ \(V_{SO_3\left(đktc\right)}=n.22,4=0,05.22,4=1,12\left(l\right)\)
\(n_{CH_4}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)
⇒ \(V_{CH_4\left(đktc\right)}=n.22,4=1,5.22,4=33,6\left(l\right)\)