Which is a pure substance? a. mixture b. solution c. molecule

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Geothermal energy for industrial use is available almost anywhere. a.true b.false

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.