Question

The atomic mass of metal is 27u if its valency is 3 the vapour density of volatile metal chloride will be

Answer 1

let the metal be X .
atomic mass.(X )=27u
valency=3

It will form metal chloride of formula X(Cl)3 , whose molecular mass =
=atomic mass (X) + 3×atomic mass(Cl )
= 27 + 3×35.5
= 27 + 106.5
= 135.5

Vapour density= Molecular mass/2
= 135.5/2
=67.75