Answer: 
Explanation:
Solubility product is defined as the equilibrium constant in which a solid ionic compound is dissolved to produce its ions in solution. It is represented as
The equation for the ionization of the
is given as:

When the solubility of
is S moles/liter, then the solubility of
will be S moles/liter and solubility of
will be 2S moles/liter.
By stoichiometry of the reaction:
1 mole of
gives 1 mole of
and 2 moles of 
![K_{sp}=[Ba^{2+}][F^{-}]^2](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%5BBa%5E%7B2%2B%7D%5D%5BF%5E%7B-%7D%5D%5E2)



Thus
for
is 
Answer:
CO
Explanation:
the rest are elements. CO is made up of one carbon atom and one oxygen atom
Answer: There are 20 milliliters of 1.0 M HCl is required to be diluted to make 200 mL of a 0.1 M solution.
Explanation:
Given:
= 1.0 M,
= ?
= 0.1 M,
= 200 mL
Formula used is as follows.

Substitute values into the above formula as follows.

Thus, we can conclude that there are 20 milliliters of 1.0 M HCl is required to be diluted to make 200 mL of a 0.1 M solution.
potassium is just below the sodium in periodic table in s group !
so the valence electron of sodium and potassium is same and that is 1