Q 1114601550.     A metal nitride contains `28%` nitrogen by weight. The molecular formula of metal nitride is `M_3N_2.` What is the atomic weight of the metal?

EAMCET 2011
A

`72`

B

`64`

C

`100`

D

`24`

HINT

Use Atomic Weight of Molecule = Sum of the mass of each constituent atom multiplied by the number of atoms of that element in the molecular formula.

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