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A polystyrne having formula Br(3)C(6)H(3...

A polystyrne having formula `Br_(3)C_(6)H_(3)(C_(3)H_(8))_(n)` found to contain 10.46% of bromine by weight. Find the value of n. (At. wt. Br = 80)

Text Solution

Verified by Experts

Let the wt of compound is 100 gm & molecular wt is M
Then moles of compound `=100/M`
Moles of Br `=100/M times 3`
wt of `Br=100/M times 3 times 80=10.46`
M = 2294.45 = 240 + 75 + 44 n , Hence n = 45
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