Which will diffuse faster ,ammonia or CO₂? what are their relative rates of diffusion.

1. Diffusion depends on several factors namely temperature,density and concentration.
2. Density for Ammonia(gas) at STP is 0.73 kg/m³ and for Carbon dioxide is 1.98 kg/m³.
3. Thus,as CO₂ will diffuse faster due to higher density as compared to NH₃.
4. Relative Rate of Diffusion :

        $\frac{r_{N{H}_3}}{r_{C{O}_2}} = \frac{\sqrt{m_{C{O}_2}}}{\sqrt{m_{NH3}}}=\sqrt{\frac{17.0}{44}}=0.38$