Question

A metal nitride of formula in three and two contains 28% nitrogen and what is the atomic mass of the metal

Answer 1

Let the mass of the compound be 100 g.

Consider the metal is represented as M.

Mass of nitrogen is 28 g.

Mass of Metal is 72 g.

3 atom of metal combine with 2 atom of nitrogen.

Molecular formula of compound is M3N2.

Molecular mass of compound is 100 g.

Consider the atomic mass of compound be 'x' u.

Atomic mass of nitrogen is 14 u.

3x + (2*14) = 100

3x = 100- 28

3x = 72

x = 72/3

x = 24 g.

Atomic mass of metal is 24 u ...

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