Answer:
Explanation has been given below.
Explanation:
Let's consider solubility equilibrium of an ionic insoluble compound e.g. 
Equilibrium constant of this solubility equilibrium is represented in terms of solubility product (
) which is expressed as-
![K_{sp}=[Ba^{2+}][SO_{4}^{2-}]](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%5BBa%5E%7B2%2B%7D%5D%5BSO_%7B4%7D%5E%7B2-%7D%5D)
Now, if we add an ionic salt e.g. 
with a common ion 
then concentration of increases.
But, at a constant temperature, is constant.
Therefore, to keep constant, excess amount of will combine with free 
ion in solution and produce .
Hence, as a whole, solubility of decreases.
The first one. observe that numerator and denominator are of same type in all other cases. but in 1st one, its length/volume which is crazy. how can one equate length to volume ? no way.
78. g on earth is 9.8 m/s^2 so F=ma and plugging in gives you F=(8kg)(9.8m/s^2) which is closest to 78 N.
The correct answer is B. a fossilized fish
That is because the scientist can use carbon dating to find the age of the fish, and that will tell the scientest the date of the layer of rock. :)
