Which of the following phase changes occur at point B on the phase diagram shown below? A) boiling
B) melting
C)sublimation
D) condensation

C. sublimation

Option C is correct answer

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

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