Answer to Question #66769 in Physical Chemistry for richick dubey

Question

How many atoms do mercury vapour molecules consist of if the density of mercury vapour relative to air is 6.92.The average mass of air is 29g/mol

Answer 1

D air (mercury vapour) = M(mercury vapour) / M(air)
M(mercury vapour) = D air (mercury vapour)*M(air) = 6.92*29 = 200.68 (g/mol)
M(Hg) = 200.6 g/mol that’s why mercury vapour molecules consist of 1 atom

Answer: mercury vapour molecules consist of 1 atom