Which of the following has the greatest mass, in grams? 1) 1 atom of gold (au) 2) 1.0 mol mercury (hg) atoms 3) 2.0 mole of chlorine (cl) atoms 4) 25 atoms of mercury (hg)

1 atom of gold is answer

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