The following reaction is carried out in an open flask: Mg(s) + 2 HCl (aq) -> MgCl2 (aq) + H2 (g) If 48.0 grams of magnesium reacts with excess hydrochloric acid (HCl), how many grams of hydrogen gas are produced?

Which statement is actually 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.