A yransition metal M forms a volatile chloride which has a vapour density of 94.8.if it contains 74.75% of chlorine what will be the formula of the metal chloride?

vapor density =molecular mass/2

molecular mass = v.d *2 = 189.6
74.75% is chloride
therefore 74.75/100 * 189.6 = 141.72 g is of chloride
no. of atoms of chloride: 141.72/35.5 =3.99 = 4 
 

Therfore formula would be MCl4