Subject	chemical formula
Predicate	be used
Object	to determine the number of atoms of each element
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.6116
Neighborhood Sigma	0.6116
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source chemical formulas are used to determine the number of atoms of each element found in compound 1 Answers.com Questions