please show the mechanism

3a. 3b

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C D chemical symbol, chemical formula or Lewis structure H :0: I | H H-C-C-0-C-H F₂ H :O: ||| : 0: H H 1 .. H H 1 HIC-C-N-C-H H H :NEN 0: boiling point (Choose one) ✓ (Choose one) ✓ (Choose one) (Choose one) X

Final answers in skeletal form

The following plot shows the potential energy of two Cl atomsas a function of the distance between them. (a) If the two atomsare very far away from each other, what is their potential energyof interaction? (b) We know that the Cl2 molecule exists. Whatis the approximate bond length and bond strength for the Cl–Cl bond in Cl2 from this graph? (c) If the Cl2 molecule is compressedunder higher and higher pressure, does the Cl–Cl bondbecome stronger or weaker?

Testosterone is an anabolic steroid. The structure of testosterone is shown below. What is the idealised bond angle at the indicated atom (i) ? Hint: atom (iv) has been completed for you as an example. (iv) bond angle: 109.5°, geometry of the electron pairs: tetrahedral, shape of the bonds: tetrahedral iii |||I H H ….………|||I H ii iv

A 0.325 g sample of a gaseous hydrocarbon (compound containing carbon and hydrogen only) occupies a volume of 193 mL at 749 mmHg and 26.1°C. Determine the molecular mass, and write a plausible Lewis structure for this hydrocarbon.

The face indicated by the arrow in the molecule below is the: A) Re face B) Si face C) R face D) S face H₂C H3C II. O H CH3 CH 3