HELP ME WITH ONE OR BOTH OF THESE QUEATIONS PLEASE

What overall charge must all compounds have

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.