Help please I really need it. :(

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.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced