In the reaction 2mg (s) + o2 (g) + 2h2o (l) → 2mg2+ (aq) + 4oh– (aq), how many electrons are transferred? a. 0 b. 1 c. 2 d. 3 e. none of the above (this is not a redox reaction.)

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.