I would say that the most polar is E) C-F, because polarity is proportional to the difference in electronegativity. Since carbon is the same in each molecule, you need to focus on non-carbon atom, which is the most polar.
B. Nanoscale
Because Nano- mean small and you’re measuring something on a ‘scale’
Hello!
The molarity of the HBr solution is 0,172 M.
Why?
The neutralization reaction between LiOH and HBr is the following:
HBr(aq) + LiOH(aq) → LiBr(aq) + H₂O(l)
To solve this exercise, we are going to apply the common titration equation:


Have a nice day!
Answer:
Yes, the formed product is calcium nitride,
.
Explanation:
Hello,
In this case, the answer is yes, since nitrogen in gaseous state is able to react with calcium in solid state to form calcium nitride as shown below:

This is possible since calcium losses two electrons and nitrogen gains three electrons to remain positively and negatively charged respectively, forming the aforementioned ionic compound.
Best regards.