4) The rotational spectrum of HCl has lines 21.1 cm-¹ apart. Calculate the moment of inertia and bond length of HCl.
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- A hypothetical NH molecule makes a rotational-level transition from l=3 to l=1 and gives off a photon of wavelength 1.800 nm in doing so. What is the seperation between the two atoms in this molecule if we model them as point masses? The mass of hydrogen 1.67 * 10^-27 kg, and the mass of nitrogen is 2.33 * 10^-26 kg.1. Cohesive energy of bcc and fcc neon. Using the Lennard-Jones potetial, calculate the ratio of the cohesive energies of neon in the bcc and fcc structures (Ans. 0.958). The lattice sums for the bcc structures are Σ;pi12 = 9.11418; Σ;pij6 = 12.25332. In terms of band diagram, explain the differences between metal, semiconductor, dielectric and superconductor.
- The number of normal modes of vibration depends on the shape of the molecule, but not on the number of atoms in the molecule. True False1. Write down all the possible Burgers vectors of perfect dislocations in an FCC metal. 2. For an a/2[1 dislocation line moving on a (11-1) plane in an FCC crystal, what are the line directions (in Miller indices) if the dislocation is of (i) pure screw and (ii) pure edge character? For an a/2[1 dislocation line moving on a (11-1) plane in an FCC crystal, what are the line directions (in Miller indices) if the dislocation is of (i) pure screw and (ii) pure edge character?Below is the LCAO for the sp3 hybrid orbital. What is the value for the c²? (The answer mus be a number, not a fraction) Ya = C($25 +02p₂ +$2p, + $2p:) 2Px