The boiling point of water in city A is 100°C, city B is 97°C and city C is 95°C. Which city is at the highest elevation?

you need to have a picture of the atom that way we can answer it

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l