# What is the density of Mercury with respect to air?

The density of Mercury is 13,593 kg/m3, whereas the density of air (at sea level and 20 degress C) is about 1.2 kg/m3. Hence, Mercury is about 11,328 times denser than air. (Divide 13,593 by 1.2.) Note that the density of air varies greatly with temperature and pressure.

### How many atoms do mercury vapor molecules consist of if the density of mercury vapor relative to air is 6.92The average mass of air is 29gmole?

29g air=1mole 29g of air corresponds to 22.4l of air therefoe 1litre of air=29/22.4=1.3 relative density=6.92 therefore 6.92*1.3=Density of mercury=8.96g/l 8.96g of Hg vapour corresponds to 1 litre of mercury therefore 8.96*22.4g of mercury vapour corresponds to 1 mole of mercury therefore 200g of mercury vapour corresponds to 1 mole of mercury at wt of mercury =200 therefore mercury vapour contains 1 atom of mercury