a piece of metal with a mass of 121 g is placed in a 50 ml graduated cylinder. the water level rises from 20. ml to 35 ml. what is the density of the metal?

8.067 g/cm^3

Explanation:

Density = Mass/Volume

where mass = 121g and

Volume = (35 - 20) = 15ml

where 1ml = 1cm^3

So Density = 121/15

;Density = 8.067 g/cm^3

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