The equiv. wt. of an element is 9. If it forms volatile chloride of vapour density 58.5. What is the approximate at wt. of the element ?

Options

A. 9
B. 18
C. 27
D. 54

Answer

C

Explanation

Let, the molecular formula of the chloride is `MCl_(x)` and at wt. of the element is a
` :. 9x +x xx 35.5= 58.5 xx 2(E = a//x) `
`x = ( 58.5 xx 2)/( 44.5) = 2.63`
The nearest whole no. of 2.63 = 3
`:.` approximate at wt. of the element `= 9 xx 3 = 27`