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  4. A compound contains 28% N2 and 72% of a metal by weight. 3 atoms of the metal combines with 2 atoms of N. The atomic weight of metal is

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Q. A compound contains 28% $N_{2}$ and 72% of a metal by weight. 3 atoms of the metal combines with 2 atoms of N. The atomic weight of metal is

NTA AbhyasNTA Abhyas 2022

Solution:

Here 3 atoms of the metal combines with 2 atoms of N
Hence, the formula of the compound $=M_{3}N_{2}$
Suppose the atomic weight of metal = X
28 g of nitrogen combines $=3Xg$ metal
From question, 28 g nitrogen combines = 72 g metal
$3X=72$
So $X=24$
Atomic weight of metal = 24.