The ratio of the mass of C-12 atom to that of an atom of element X (whose atomicity is four) is `1:9`. The molecular mass of element x is :-

Options

A. `480 g mol^(-1)`
B. `432 g mol^(-1)`
C. `36 g mol^(-1)`
D. `84 g mol^(-1)`

Answer

B

Explanation

Molecular mass `=("weight of molecule")/("weight of"(1)/(12) "th part of" C-12 "atom")`