The products of a chemical reaction can never have greater mass than the reactants

true or false

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

frequency or wavelenth of em radiation in a vacuum