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Grade: 12

                        

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

4 years ago

Answers : (1)

Vikas TU
12277 Points
							
First calculate the total molecular mass of the compound, Br3C6H3(C3H8)n that is: => 314.7 + 104n
And molecular weight of 3 Br atoms => 3 * 79.8 = > 240(approx.)
Now, 240/(314.7 + 104n) * 100 = 10.46
On simplifying this U would get n = 19 perhaps.
4 years ago
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