The chloride of a metal (M) contains 65.5% of chlorine. 100 ml of the vapour of the chloride of the metal at STP weights 0.72 g. The molecular formula of the metal chloride is:

Options

A. MCl
B. `MCl_(2)`
C. `MCl_(3)`
D. `MCl_(4)`

Answer

C

Explanation

Molecular mass of metal chloride
`=(0.72 xx 22400)/(100) = 161.28`
Mass of chlorine in molar mass of chloride
`=(65.5 xx 161.28)/(100) = 105.64 g`
Mole atoms of chlorine in one mole of chloride
`= (105.64 )/(35.5)= 3`