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How many atoms do a mercury vapour molecule consist of, if the vapour density of mercury vapour relative to air is 6.92? (Atomic mass of mercury is 200). The average molar mass of air is 29g/mol.

Answer»


Solution :`("VAPOUR DENSITY of Hg vapour")/("Vapour density of air")=("MOLAR mass of Hg")/("Molar mass of Air")`
`(6.92)/(1)=(m)/(29)` or m=200g/mol.


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