47. A compound contains 28% of nitrogen and 72% of a metal by weight. Three atoms of the metal

combine with two atoms of nitrogen. Find the equivalent weight of the metal.

(a) 12 (b) 24 (c) 36 (d) 48

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47. A compound contains 28% of nitrogen and 72% of a metal by weight. Three atoms of the metal

combine with two atoms of nitrogen. Find the equivalent weight of the metal.

(a) 12 (b) 24 (c) 36 (d) 48

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and given that it is 28% by weight

let the weight of compound be x

therefore weight of nitrogen=

now given that there are two atoms of nitrogen

i.e.

now let the molecular mass of metal be M

given that metal is 72% by weight

therefore weight of metal=

now given that there are three atoms of metal

i.e.

now,equivalent weight =

there are two charge on metal

therefore,Equivalent weight of metal=

=12 ans....................