Band structure digarams

See attached problem. I am having trouble on all parts of the problem.

Chemical Bonding

Problem numbers 6 and 7 from the following attachment are rather confusing. I completed the problems, but I'm not sure if I did them correctly. I am very confused as to how to figure out how to complete problems 6 and 7. For 6, I was told that the Phosphorous triple bond is much weaker than its single bond and that the Nitrogen triple bond is not much weaker than the nitrogen single bond. Just by looking at the bond dissociation energies, I would have no idea I how to understand this concept. Also, nitrogen is quite electronegative so it prefers to have the electrons closer to itself--is this statement true for applying it to question number 6? For question number 7, I was told that the fi... click for more

Chemical Bonding

I have been having trouble figuring out how to do problems 8-10 in the attachment below. I completed the problems, but I would like to make sure that I have the correct answers and that I understand the solutions to the problems.

A simple Entroy question:

A) Define entropy. Why is entroy considered an absolute quantity? B) For each of the pairs of substances below, choose the one expected to have the greater absolute entropy. Explain your answer. Assume 1 mol of each substance. i) Cu(s) or C(graphite) at the same temperature and pressure ii) Ne(g) at 5.0atm or Ne(g) at 0.10atm, both at the same temperature. iii) Liquid water or liquid hexane, both at the same temperature and presure. iv) Ca(s) at 300K or Ca(s) at 500K, both at the same pressure.

Deals with molecular orbitals and symmetry (symmetry functions such as Sn, Cn, sigma v, sigma h, and i)

(see attachment) Please complete #1-7. I will have worked on them as well and I would like to compare my answers to see if I'm on the right track. Thank you!