Balance the following chemical equations.
(fill in the blanks)

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.

How many atomic mass units are equal to 1.672×10−24 g of protons?

Which model represents the process of nuclear fusion?