Which energy source can be renewed in less than a week? a ton of coal
a barrel of oil
the charge on a solar battery cell
the ethanol produced by an acre of corn

In this synthesis reaction what products will form

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.

Which property of water causes water drops to bead on a freshly waxed car?