Question

fill on the blanks...a pure substantance has a fixed_or_at constant temperature
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Answer 1

Answer:

A pure substance has a fixed MASS and VOLUME at a constant temperature

Explanation : mass is independent of temperature - for a pure substance -- so there will be no change observed in mass

volume is inversely proportional to temperature - but if no change is made to temperature (i.e. constant temperature) --- there will be no change observed in volume.