A polystyrene having the formula \( \mathrm{Br}_{3} \mathrm{C}_{6} \mathrm{H}_{3} \quad\left(\ma...

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A polystyrene having the formula \( \mathrm{Br}_{3} \mathrm{C}_{6} \mathrm{H}_{3} \quad\left(\mathrm{C}_{8} \mathrm{H}_{8}\right)_{\mathrm{n}} \), was prepared by heating styrene with tribromo benzoyl peroxide in the absence of air. If it was found to contain \( 10.45 \% \) of bromine by mass. Find the value of \( n \).
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