Questions: Chemically pure substances will freeze: Over a range of temperatures. At a specific temperature. Chemically pure substances tend not to freeze.

Chemically pure substances will freeze: Over a range of temperatures. At a specific temperature. Chemically pure substances tend not to freeze.
Transcript text: Chemically pure substances will freeze: Over a range of temperatures. At a specific temperature. Chemically pure substances tend not to freeze.
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Solution

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Solution Steps

Step 1: Understanding Freezing of Pure Substances

Chemically pure substances have a specific freezing point, which is the temperature at which they transition from liquid to solid.

Step 2: Analyzing the Options
  • "Over a range of temperatures" implies a gradual transition, which is not typical for pure substances.
  • "At a specific temperature" aligns with the definition of a pure substance having a distinct freezing point.
  • "Chemically pure substances tend not to freeze" is incorrect as pure substances do freeze at their specific freezing points.

Final Answer

The answer is: \(\boxed{\text{At a specific temperature}}\)

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