Question

In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is _____% (nearest integer)
(Relative atomic masses of Ag and Br are 108 u and 80 u, respectively).

Answer 1

$188$ g AgBr has $80$ g of Br
∴ $0.4$ g AgBr $=\frac {80}{188} × 0.4$
% of Br in given organic compound
$= \frac {80 × 0.4}{188 × 0.5 }× 100$
≈ 34%

So, the answer is 34%.