They become more stable because they achieve a full outer shell of valence electrons with the magic number of 8.
multiply the number of each atom with its molecular mass. (see the periodic table)
5*12 + 12*1 = 72 gram per mole.
Or more accurately: 5*12.01078 + 12*1.007947 = 72.149264 g/mole
The answer is- The solubility of a given solute in a given solvent typically depends on temperature.