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