11. Calculate E°cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous. I,(s) + 2e- 21-(aq); E°= o.53 V Cr3+ (aq) + 3e- = Cr(s); E°= -0.74 V Overall reaction: 2Cr(s) + 312(s) → 2Cr³* (aq) + (aq) + 6I(aq)

(11.7) Identify the number of sigma bonds and pi bonds in a triple bond. O 1 sigma, 2 pi 2 sigma, 1 pi 3 sigma, 0 pi O 0 sigma, 3 pi

Briefly explain the term ‘chemoselectivity’

(5) 1. A series of compounds consists of an alcohol, an alkane, an ether, an alkyne, and an alkene. All the compounds have a similar size, shape, and mass; and all of them have approximately the same mp, except the alcohol, which has a much higher melting point than the others. What factor best explains this? A. polarity C. presence of pi bonds B. hydrogen bonding D. presence of oxygen