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IrinaVladis [17]
3 years ago
5

A white solid was left out after a class had tidied up their

Chemistry
1 answer:
kirza4 [7]3 years ago
7 0

Answer:

LiBr

Explanation:

Group 1 metals give a characteristic colour when subjected to flame test. The colour can tell us exactly what the identity of metal being studied.

Now, Lithium metal gives a red flame. Hence the group 1 metal ion is Li^+. Similarly, bromides give a creamy precipitate when reacted with silver nitrate.

This means that the solid substance under study is LiBr.

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Molecular bromine is 24 percent dissociated at 1600 k and 1.00 bar in the equilibrium br2 (
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Br2 == 2Br

24% dissociated => n total moles, 0.24 mol*n of Br, and 0.76*n mol of Br2

=> partial pressure of Br, P Br = 0.24 bar, and
     partical pressure of Br2, P Br2 = 0.76 bar

kp = (P Br)^2 / P Br2 = (0.24)^2 / 0.76 = 0.0758


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