Characterize the following compounds as soluble or insoluble in water. (a) CaCO3 soluble insoluble (b) ZnSO4 soluble insoluble (c) Hg(NO3)2 soluble insoluble (d) PbSO4 soluble insoluble (e) NH4ClO4 soluble insoluble

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

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.