castro123 castro123

06-07-2016
Chemistry

contestada

In a chemical reaction, if a color change is detected, if an odor change is detected, or if a precipitate is formed, then:

a chemical reaction has definitely occurred

only physical reactions have occurred

a chemical reaction may have occurred

both physical and chemical reactions have definitely occurred

Respuesta :

WizKalista WizKalista

06-07-2016

a chemical reaction has definitely occured

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beautiful002002 beautiful002002

06-07-2016

c. a chemical reaction may have occurred

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