Subject	concentration
Predicate	affect
Object	rate of chemical reaction
Modality	Modality Occurrences some[subj/changing] 1
Polarity	POSITIVE
Plausibility	0.7919
Neighborhood Sigma	0.7920
Local Sigma	0.7985
Example Sentences	Sentence Occurrences Source changing concentration affect the rate of a chemical reaction 1 Google Autocomplete concentration affects the rate of chemical reaction 2 Answers.com Questions