A movable chamber has a volume of 18,5 L (at a temperature
of 18.5°C) Assuming no gas escapes and the pressure
remains constant, what is the temperature when the
chamber has a volume of 19.8 L?

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

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