Me in understanding the difference between k. s.p and k. i.p that is, solubility product and ionic product.
i have an exam tomorrow.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

it's c (engineer's do their work with mechanical stuff not on any living being)

the answer is 0.42 is that is an option. this question provides no info