Subject	impurity
Predicate	effect
Object	the freezing point of pure substances
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.2596
Neighborhood Sigma	0.2713
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source impurity effects the melting point and freezing point of pure substances 1 Answers.com Questions