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A polystyrene,having the formula Br3C6H3(C3H8)n,contains 10.46% bromine by weight,find the value of n

A polystyrene,having the formula Br3C6H3(C3H8)n,contains 10.46% bromine by weight,find the value of n

Grade:12

1 Answers

Vikas TU
14149 Points
7 years ago
Br3 molecular weight = 240
Br3C6H3 weight = 315
C8H8 = 104
Molecular weight of whole compound would be=> 315 + 104n
% Br = 240/(315 + 104n) * 100 => 10.46%
On solving,
we get n = 19 approx.

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