1.

A compound made of two elements A and B are found to contain 25% A (Atomic mass 12.5) and 75% B (Atomic mass 37.5). The simplest formula of the compound is _______. (A) AB (B) AB2 (C) AB3 (D) A3B

Answer»

Correct option: (A) AB

Elements% CompositionAtomic MassMolesRatio
A2512.5\(\frac{25}{12.5} = 2\)\(\frac{2}{2} = 1\)
B7537.5\(\frac{75}{37.5} = 2\)\(\frac{2}{2} = 1\)

Hence, the simplest formula of the compound is AB.


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