Q 1(a) Methane, CH4 is a tetrahedral molecule and does not exhibit a permanent dipole moment (i.e. it has a dipole moment of 0). Nonetheless, in microwave spectroscopy methane does exhibit a weak, but measurable absorbance. Explain why you think this is the case? Q 1(b) The diatomic molecule 12C32S has been detected in interstellar gas clouds by microwave spectroscopy. The masses of the two atoms are C = 12.00 amu and S= 31.972 amu and 12C32S has an equilibrium bond length of 1.534 Å. Predict which rotational transition in 12C32S will have the greatest population at a temperature of 85 K.

.Assuming reasonable bond lengths, estimate the frequency of the J=15 – 14 transition in the linear molecule N≡C-(C≡C)6-H. In which region of the electromagnetic spectrum does it lie

Propose a structure for a molecule with formula C4H4 that meets the following description: Contains 2 sp carbons and 2 sp² carbons • In cases where there is more than one answer, just draw one. • Explicitly draw all H atoms.

A carbon is covalently attached to =O, -CH2-CH3, and -CH3. It is best called a(n):     aldehyde     fatty acid     ketone     carbohydrate     alcohol     amino acid   The movement of low-density lipoprotein (LDL) particles into our body cells from the bloodstream occurs by:     passive transport       a channel protein       facilitated diffusion       active transport       exocytosis     Chlorophyll fluorescence occurs when electrons are unable to move forward in the reactions of photosynthesis because the reactions are slowing down. Which of the following would be likely to cause an increase in chlorophyll fluorescence, i.e. by slowing down photosynthesis? choose one or more, or none  1-making more thylakoid membranes in chloroplasts 2-giving chloroplasts access to more CO2 3-raising the pH of the thylakoid spaces