Answer:
Percentage of mass of solute in aqueous phase is 28.57%.
Explanation:
- Fraction of solute in aqueous phase.

= Used volume of aqueous solution
= Used volume of organic solution
D = partition coefficient.

Mass of solute in aqueous phase = 

Therefore, Percentage of mass of solute in aqueous phase is 28.57%.
Answer:
A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.
Explanation:
Answer: The given transition metal ions in order of decreasing number of unpaired electrons are as follows.

Explanation:
In atomic orbitals, the distribution of electrons of an atom is called electronic configuration.
The electronic configuration in terms of noble gases for the given elements are as follows.
- Atomic number of Fe is 26.
![Fe^{3+} - [Ar] 3d^{5}](https://tex.z-dn.net/?f=Fe%5E%7B3%2B%7D%20-%20%5BAr%5D%203d%5E%7B5%7D)
So, there is only 1 unpaired electron present in
.
- Atomic number of Mn is 25.
![Mn^{4+} - [Ar]3d^{3}](https://tex.z-dn.net/?f=Mn%5E%7B4%2B%7D%20-%20%5BAr%5D3d%5E%7B3%7D)
So, there are only 3 unpaired electrons present in
.
- Atomic number of V is 23.
![V^{3+} - [Ar] 3d^{2}](https://tex.z-dn.net/?f=V%5E%7B3%2B%7D%20-%20%5BAr%5D%203d%5E%7B2%7D)
So, there are only 2 unpaired electrons present in
.
- Atomic number of Ni is 28.
![Ni^{2+} - [Ar] 3d^{8}](https://tex.z-dn.net/?f=Ni%5E%7B2%2B%7D%20-%20%5BAr%5D%203d%5E%7B8%7D)
So, there will be 2 unpaired electrons present in
.
- Atomic number of Cu is 29.
![Cu^{+} - [Ar] 3d^{10}](https://tex.z-dn.net/?f=Cu%5E%7B%2B%7D%20-%20%5BAr%5D%203d%5E%7B10%7D)
So, there is no unpaired electron present in
.
Therefore, given transition metal ions in order of decreasing number of unpaired electrons are as follows.

Thus, we can conclude that given transition metal ions in order of decreasing number of unpaired electrons are as follows.

The molarity of a solution is the number of moles of a substance in one liter of that substance.
The molar mass of ammonium sulfate (NH4)2SO4 is 132.14 grams/mole
Calculate the moles of ammonium sulfate:
(4.50 grams)/(132.14 grams/mole) = 0.0341 moles of ammonium sulfate
convert mL to Liters 250. mL becomes 0.250 liters
Take the number of moles over the number of liters
0.0341 moles / 0.250 liters = 0.136 molar or 0.136M = molarity of the solution