D. i'm pretty sure. hope that helps!
The H3O in a solution is 12.57.
<u>Explanation</u>:
The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH.
pOH = -log[H3O]
pOH = -log(3.75x10^-2)
= 1.43
Now, pH = 14 - 1.43
= 12.57
The H3O in a solution is 12.57.
Use the trends in the ionization energies of the elements to explain the following observations. (a) Elements on the left side of the periodic table are more likely than those on the right to form positive ions. Ionization energies measure the tendency of a neutral atom to resist the loss of electrons.
Not any answer choices so this is the best answer that i can give you.
Answer:
electron revolving in a shell is associated with a definite amount of energy. The energy changes when it jumps to another shell that is so say when it goes from one level of energy level to another. Thus shell also gives the energy of a electron besides its location and are therefore called energy levels.