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20-12-2020
Chemistry

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The melting points of four impure samples of lead(II) bromide were measured. The results are
shown.
Which sample is the most pure?
temperature when
the sample started
to melt/ °C
temperature when
the sample finished
melting/°C
А
342
355
B
353
360
С
365
371
D
372
373
А
o

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20-12-2020

Answer:

D

372

373

Explanation:

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