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9. In the graphic below we have two types of materials X and Y: i) a & b refer to material "X" in the absence of an external magnetic field and in the presence of magnetic field respectively. "c" refers to material "Y" with different domains having different orientations of electron spin and "d" refers to material "Y" under the influence of an external magnetic field. Identify whether (X or Y) is paramagnetic or ferromagnetic or neither. ii) ii) X: (a) (b) AAA. TTTTT Y: (c) (d)

What in Bacha'2H2O? 3 the true percen tage of weter

Would you expect a C¬C s bond formed by sp2–sp2 overlap to be stronger or weaker than a C¬C s bond formed by sp3–sp3 overlap?

water Drew holedre interacting with each possible point of norecole. Use pekel cheres Cこ

Tramisol (shown below) is an anthelmintic used to control intestinal and lung worms in sheep and cattle. How many asymmetric centers are present in this structure? S ·N· N

stion 1 Consider the prochiral compound shown below. Is this the re or si face? re Osi 9 MacBook Air 80

hat is meant by the term driving forces? Why are mailer spread and energy spread considered to be driving forces?

the following figure shows the bond distances for the homonuclear diatomics of the 2 nd period p-block elements, as well as those for some of the ions derived from these species.      i) Note that N 2 + has a longer bond distance than N 2, but O 2 + has a shorter bond distance than O 2. Explain this difference.       ii) Estimate the bond distance of N 2 - and justify your answer.

4. Draw the LCAO MO diagram of CO₂ and show its ground-state electron configuration using the D₂h point group (hint: find the LCAO MOs of O₂ first). Use the approximate relative energies of C and O orbitals below: E 2p 2s C O 2p 2s axes: X 0=C=0- N