Đặt mT = a (g)
\(\rightarrow\left\{{}\begin{matrix}m_{O_2}=50\%.a=0,5a\left(g\right)\\m_{O_3}=a-0,5a=0,5a\left(g\right)\end{matrix}\right.\\ \rightarrow\left\{{}\begin{matrix}n_{O_2}=\dfrac{0,5a}{32}=0,015625a\left(mol\right)\\n_{O_3}=\dfrac{0,5a}{48}=\dfrac{a}{96}\left(mol\right)\end{matrix}\right.\\ \rightarrow M_T=\dfrac{a}{0,015625a+\dfrac{a}{96}}=38,4\left(\dfrac{g}{mol}\right)\)
=> dT/He = \(\dfrac{38,4}{4}=9,6\)