Question

The boling point of semple of water at atmosphere pressure is one 102 c thus the sample represtive a pure substance

Answer 1

No, it is not a pure substance because we know that the addition of substances increase the boiling point of water. In chemistry, pure water is distilled water which has the boiling point of 100°C.

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Answer 2

to confirm that whether this sample is a pure substance or not we should look at it's boiling point
if the boiling point is not equal to 100°C than this sample is not a pure substance