Answer:- B- 
Explanations:- Sharing of electrons takes place between non metals and the bond formed by the sharing of electrons is known as covalent bond. In first choice we only have a zinc metal and so no sharing of electrons would be possible here.
In third choice we have NaCl. Na is a metal and Cl is a non metal. The property of metals is to transfer its valence electrons to the non metal and the bond formed is known as ionic bond. So, third choice is also not correct.
In choice B we have sulfate ion that has sulfur and oxygen atoms and both of these are non metals. So, sharing of electrons is present here between the S and O atoms and covalent bonds are formed.
So, choice B- is the right answer.
Answer:
0.725 moles
Explanation:
Use the mole = mass/mr equation to find the moles.
Mole = 14.5/20 (Neon's Mr) = 0.725 Moles
There doesn't seem to be a clear answer, it is placed in the center when it's substances is on the corners it doesn't give anything else
Answer:
W = ΔKE = 1/2mv₂⁽²⁾ - 1/2mv₁⁽²⁾
Explanation:
Work means Change In Kinetic Energy.
Kinetic-Energy is equal to change in velocity multiplied by mass and divided by 2
∴ KE = 1/2m²
Change in Kinetic-Energy =KE₂ - KE₁
=1/2mv₂⁽²⁾ - 1/2mv₁⁽²⁾
I think the correct answer from the choices listed above is the second option. The other true statement would be that the solution contains more hydronium ions than hydroxide ions. Since <span>pH = -log[H3O+]. As pH decreases, the acidity increases. Hope this answers the question.</span>
