What is the reduction half-reaction for 2Mg + O2 + 2Mgo? O A. Mg → Mg2+ + 2e
O B. 202- → 02 + 4e
O C. O2 + 4e- → 202-
O D. Mg2+ + 2e → Mg

State the formula for density in words and mathematical symbols

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.