Question

A compound contains 28 percent of nitrogen and 72 percent of metal by weight. 3 atoms of metal combine with 2 atoms of N. Find the atomic weight of metal.

Answer 1

three atoms of M combine with 2 atoms of N

Equivalent wt of N = 14/3 (∵ valency of N in compound is 3)

∵ 288 g n combines with = 72g metal

∴ 14/3 N combines with = 72/28 * 14/3 = 12

∴ Eq. wt. of metal = 12

At wt of metal = Eq. wt * valency = 12 * 2 = 24 [Valency]

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