Two ways 2 Describe two ways in which sodium chloride is different from chlorine. (for 7th graders)

its first and third is your answer i did the qustion the fourth isnt right

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