Molecular mass of "SO_2(m_1)=64 gm"
Molecular mass of "Cl_2(m_2)=35.5 \\times 2=71 \\ gm"
By using Graham law of diffusion,
"\\frac{r_1}{r_2}=\\sqrt{\\frac{m_2}{m_1}}"
where "r_1" and "r_2" are rate of diffusion respectively.
"r_1=2.4 \\ mol\/min"
Using the above equation,
"\\frac{2.4}{r_2}=\\sqrt{\\frac{71}{64}}\\implies r_2=2.28 \\ mol\/min"
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